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30 changed files with 386 additions and 1006 deletions

4
.gitignore vendored
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@ -3,10 +3,6 @@ skyview
build/
dist/
# Debian package build artifacts
debian/usr/bin/skyview
debian/usr/bin/beast-dump
# Configuration
config.json

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@ -1,26 +1,13 @@
PACKAGE_NAME=skyview
BINARY_NAME=skyview
BUILD_DIR=build
VERSION=$(shell git describe --tags --always --dirty 2>/dev/null || echo "dev")
LDFLAGS=-w -s -X main.version=$(VERSION)
.PHONY: build build-all clean run dev test lint deb deb-clean install-deps
.PHONY: build clean run dev test lint deb deb-clean install-deps
# Build main skyview binary
build:
@echo "Building skyview..."
@echo "Building $(BINARY_NAME)..."
@mkdir -p $(BUILD_DIR)
go build -ldflags="$(LDFLAGS)" -o $(BUILD_DIR)/skyview ./cmd/skyview
# Build beast-dump utility binary
build-beast-dump:
@echo "Building beast-dump..."
@mkdir -p $(BUILD_DIR)
go build -ldflags="$(LDFLAGS)" -o $(BUILD_DIR)/beast-dump ./cmd/beast-dump
# Build all binaries
build-all: build build-beast-dump
@echo "Built all binaries successfully:"
@ls -la $(BUILD_DIR)/
go build -ldflags="-w -s -X main.version=$(VERSION)" -o $(BUILD_DIR)/$(BINARY_NAME) ./cmd/skyview
clean:
@echo "Cleaning..."

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@ -17,14 +17,13 @@ A high-performance, multi-source ADS-B aircraft tracking application that connec
- **Multi-view Dashboard**: Map, Table, Statistics, Coverage, and 3D Radar views
### Professional Visualization
- **Signal Analysis**: Signal strength visualization and coverage analysis
- **Signal Analysis**: Signal strength heatmaps and coverage analysis
- **Range Circles**: Configurable range rings for each receiver
- **Flight Trails**: Historical aircraft movement tracking
- **3D Radar View**: Three.js-powered 3D visualization
- **Statistics Dashboard**: Aircraft count timeline *(additional charts under construction)* 🚧
- **3D Radar View**: Three.js-powered 3D visualization (optional)
- **Statistics Dashboard**: Live charts and metrics
- **Smart Origin**: Auto-calculated map center based on receiver locations
- **Map Controls**: Center on aircraft, reset to origin, toggle overlays
- **Signal Heatmaps**: Coverage heatmap visualization *(under construction)* 🚧
### Aircraft Data
- **Complete Mode S Decoding**: Position, velocity, altitude, heading
@ -52,7 +51,7 @@ A high-performance, multi-source ADS-B aircraft tracking application that connec
```bash
# Install
sudo dpkg -i skyview_0.0.2_amd64.deb
sudo dpkg -i skyview_2.0.0_amd64.deb
# Configure
sudo nano /etc/skyview/config.json
@ -120,18 +119,9 @@ Access the web interface at `http://localhost:8080`
### Views Available:
- **Map View**: Interactive aircraft tracking with receiver locations
- **Table View**: Sortable aircraft data with multi-source information
- **Statistics**: Aircraft count timeline *(additional charts planned)* 🚧
- **Coverage**: Signal strength analysis *(heatmaps under construction)* 🚧
- **3D Radar**: Three-dimensional aircraft visualization *(controls under construction)* 🚧
### 🚧 Features Under Construction
Some advanced features are currently in development:
- **Message Rate Charts**: Per-source message rate visualization
- **Signal Strength Distribution**: Signal strength histogram analysis
- **Altitude Distribution**: Aircraft altitude distribution charts
- **Interactive Heatmaps**: Leaflet.heat-based coverage heatmaps
- **3D Radar Controls**: Interactive 3D view manipulation (reset, auto-rotate, range)
- **Enhanced Error Notifications**: User-friendly toast notifications for issues
- **Statistics**: Live metrics and historical charts
- **Coverage**: Signal strength analysis and heatmaps
- **3D Radar**: Three-dimensional aircraft visualization
## 🔧 Building
@ -203,7 +193,7 @@ make check # Run all checks
### Systemd Service (Debian/Ubuntu)
```bash
# Install package
sudo dpkg -i skyview_0.0.2_amd64.deb
sudo dpkg -i skyview_2.0.0_amd64.deb
# Configure sources in /etc/skyview/config.json
# Start service
@ -259,9 +249,9 @@ MIT License - see [LICENSE](LICENSE) file for details.
## 🆘 Support
- [Issues](https://kode.naiv.no/olemd/skyview/issues)
- [Documentation](https://kode.naiv.no/olemd/skyview/wiki)
- [Configuration Examples](https://kode.naiv.no/olemd/skyview/src/branch/main/examples)
- [GitHub Issues](https://github.com/skyview/skyview/issues)
- [Documentation](https://github.com/skyview/skyview/wiki)
- [Configuration Examples](https://github.com/skyview/skyview/tree/main/examples)
---

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@ -6,7 +6,7 @@
// - index.html: Main web interface with aircraft tracking map
// - css/style.css: Styling for the web interface
// - js/app.js: JavaScript client for WebSocket communication and map rendering
// - icons/*.svg: Type-specific SVG icons for aircraft markers
// - aircraft-icon.svg: SVG icon for aircraft markers
// - favicon.ico: Browser icon
//
// The embedded filesystem is used by the HTTP server to serve static content

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@ -0,0 +1,5 @@
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="#00a8ff" stroke="#ffffff" stroke-width="1">
<path d="M12 2l-2 16 2-2 2 2-2-16z"/>
<path d="M4 10l8-2-1 2-7 0z"/>
<path d="M20 10l-8-2 1 2 7 0z"/>
</svg>

After

Width:  |  Height:  |  Size: 224 B

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@ -195,8 +195,8 @@ body {
.display-options {
position: absolute;
top: 320px;
right: 10px;
top: 10px;
left: 10px;
z-index: 1000;
background: rgba(45, 45, 45, 0.95);
border: 1px solid #404040;
@ -417,115 +417,6 @@ body {
color: #ffffff !important;
}
/* Under Construction Styles */
.under-construction {
color: #ff8c00;
font-size: 0.8em;
font-weight: normal;
margin-left: 8px;
}
.construction-notice {
background: rgba(255, 140, 0, 0.1);
border: 1px solid #ff8c00;
border-radius: 4px;
padding: 8px;
margin: 8px 0;
font-size: 0.9em;
color: #ff8c00;
text-align: center;
}
/* Toast Notifications */
.toast-notification {
position: fixed;
top: 20px;
right: 20px;
background: rgba(40, 40, 40, 0.95);
border: 1px solid #555;
border-radius: 6px;
padding: 12px 20px;
color: #ffffff;
font-size: 0.9em;
max-width: 300px;
z-index: 10000;
transform: translateX(320px);
transition: transform 0.3s ease-in-out;
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}
.toast-notification.error {
border-color: #ff8c00;
background: rgba(255, 140, 0, 0.1);
color: #ff8c00;
}
.toast-notification.show {
transform: translateX(0);
}
/* Version Info */
.version-info {
font-size: 0.6em;
color: #888;
font-weight: normal;
margin-left: 8px;
}
/* Repository Link */
.repo-link {
color: #888;
text-decoration: none;
font-size: 0.7em;
margin-left: 6px;
opacity: 0.6;
transition: opacity 0.2s ease, color 0.2s ease;
}
.repo-link:hover {
color: #4a9eff;
opacity: 1;
text-decoration: none;
}
/* Collapsible Sections */
.collapsible-header {
cursor: pointer;
user-select: none;
display: flex;
justify-content: space-between;
align-items: center;
margin: 0 0 8px 0;
padding: 4px 0;
border-bottom: 1px solid #444;
}
.collapsible-header:hover {
color: #4a9eff;
}
.collapse-indicator {
font-size: 0.8em;
transition: transform 0.2s ease;
color: #888;
}
.collapsible-header.collapsed .collapse-indicator {
transform: rotate(-90deg);
}
.collapsible-content {
overflow: hidden;
transition: max-height 0.3s ease;
max-height: 200px;
}
.collapsible-content.collapsed {
max-height: 0;
margin: 0;
padding: 0;
}
.leaflet-popup-tip {
background: #2d2d2d !important;
}

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@ -28,7 +28,7 @@
<body>
<div id="app">
<header class="header">
<h1>SkyView <span class="version-info">v0.0.2</span> <a href="https://kode.naiv.no/olemd/skyview" target="_blank" class="repo-link" title="Project Repository"></a></h1>
<h1>SkyView</h1>
<!-- Status indicators -->
<div class="status-section">
@ -81,13 +81,10 @@
<button id="toggle-dark-mode" title="Toggle dark/light mode">🌙 Night Mode</button>
</div>
<!-- Options -->
<!-- Display options -->
<div class="display-options">
<h4 class="collapsible-header collapsed" id="display-options-header">
<span>Options</span>
<span class="collapse-indicator"></span>
</h4>
<div class="option-group collapsible-content collapsed" id="display-options-content">
<h4>Display Options</h4>
<div class="option-group">
<label>
<input type="checkbox" id="show-site-positions" checked>
<span>Site Positions</span>
@ -208,19 +205,16 @@
<canvas id="aircraft-chart"></canvas>
</div>
<div class="chart-card">
<h3>Message Rate by Source <span class="under-construction">🚧 Under Construction</span></h3>
<h3>Message Rate by Source</h3>
<canvas id="message-chart"></canvas>
<div class="construction-notice">This chart is planned but not yet implemented</div>
</div>
<div class="chart-card">
<h3>Signal Strength Distribution <span class="under-construction">🚧 Under Construction</span></h3>
<h3>Signal Strength Distribution</h3>
<canvas id="signal-chart"></canvas>
<div class="construction-notice">This chart is planned but not yet implemented</div>
</div>
<div class="chart-card">
<h3>Altitude Distribution <span class="under-construction">🚧 Under Construction</span></h3>
<h3>Altitude Distribution</h3>
<canvas id="altitude-chart"></canvas>
<div class="construction-notice">This chart is planned but not yet implemented</div>
</div>
</div>
</div>
@ -239,11 +233,10 @@
<!-- 3D Radar View -->
<div id="radar3d-view" class="view">
<div class="radar3d-controls">
<div class="construction-notice">🚧 3D Controls Under Construction</div>
<button id="radar3d-reset" disabled>Reset View</button>
<button id="radar3d-auto-rotate" disabled>Auto Rotate</button>
<button id="radar3d-reset">Reset View</button>
<button id="radar3d-auto-rotate">Auto Rotate</button>
<label>
<input type="range" id="radar3d-range" min="10" max="500" value="100" disabled>
<input type="range" id="radar3d-range" min="10" max="500" value="100">
Range: <span id="radar3d-range-value">100</span> km
</label>
</div>

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@ -107,9 +107,6 @@ class SkyView {
});
}
// Setup collapsible sections
this.setupCollapsibleSections();
const toggleDarkModeBtn = document.getElementById('toggle-dark-mode');
if (toggleDarkModeBtn) {
toggleDarkModeBtn.addEventListener('click', () => {
@ -461,43 +458,6 @@ class SkyView {
// Clean up old trail data, etc.
}, 30000);
}
setupCollapsibleSections() {
// Setup Display Options collapsible
const displayHeader = document.getElementById('display-options-header');
const displayContent = document.getElementById('display-options-content');
if (displayHeader && displayContent) {
displayHeader.addEventListener('click', () => {
const isCollapsed = displayContent.classList.contains('collapsed');
if (isCollapsed) {
// Expand
displayContent.classList.remove('collapsed');
displayHeader.classList.remove('collapsed');
} else {
// Collapse
displayContent.classList.add('collapsed');
displayHeader.classList.add('collapsed');
}
// Save state to localStorage
localStorage.setItem('displayOptionsCollapsed', !isCollapsed);
});
// Restore saved state (default to collapsed)
const savedState = localStorage.getItem('displayOptionsCollapsed');
const shouldCollapse = savedState === null ? true : savedState === 'true';
if (shouldCollapse) {
displayContent.classList.add('collapsed');
displayHeader.classList.add('collapsed');
} else {
displayContent.classList.remove('collapsed');
displayHeader.classList.remove('collapsed');
}
}
}
}
// Initialize application when DOM is ready

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@ -362,14 +362,6 @@ export class AircraftManager {
<div class="detail-row">
<strong>Type:</strong> ${type}
</div>
${aircraft.TransponderCapability ? `
<div class="detail-row">
<strong>Transponder:</strong> ${aircraft.TransponderCapability}
</div>` : ''}
${aircraft.SignalQuality ? `
<div class="detail-row">
<strong>Signal Quality:</strong> ${aircraft.SignalQuality}
</div>` : ''}
<div class="detail-grid">
<div class="detail-item">

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@ -352,14 +352,8 @@ export class MapManager {
}
createHeatmapOverlay(data) {
// 🚧 Under Construction: Heatmap visualization not yet implemented
// Planned: Use Leaflet.heat library for proper heatmap rendering
console.log('Heatmap overlay requested but not yet implemented');
// Show user-visible notice
if (window.uiManager) {
window.uiManager.showError('Heatmap visualization is under construction 🚧');
}
// Simplified heatmap implementation
// In production, would use proper heatmap library like Leaflet.heat
}
setSelectedSource(sourceId) {

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@ -316,22 +316,6 @@ export class UIManager {
showError(message) {
console.error(message);
// Simple toast notification implementation
const toast = document.createElement('div');
toast.className = 'toast-notification error';
toast.textContent = message;
// Add to page
document.body.appendChild(toast);
// Show toast with animation
setTimeout(() => toast.classList.add('show'), 100);
// Auto-remove after 5 seconds
setTimeout(() => {
toast.classList.remove('show');
setTimeout(() => document.body.removeChild(toast), 300);
}, 5000);
// Could implement toast notifications here
}
}

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beast-dump-with-heli.bin Normal file

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@ -5,16 +5,14 @@
// in human-readable format on the console.
//
// Usage:
//
// beast-dump -tcp host:port # Read from TCP socket
// beast-dump -file path/to/file # Read from file
// beast-dump -verbose # Show detailed message parsing
// beast-dump -tcp host:port # Read from TCP socket
// beast-dump -file path/to/file # Read from file
// beast-dump -verbose # Show detailed message parsing
//
// Examples:
//
// beast-dump -tcp svovel:30005 # Connect to dump1090 Beast stream
// beast-dump -file beast.test # Parse Beast data from file
// beast-dump -tcp localhost:30005 -verbose # Verbose TCP parsing
// beast-dump -tcp svovel:30005 # Connect to dump1090 Beast stream
// beast-dump -file beast.test # Parse Beast data from file
// beast-dump -tcp localhost:30005 -verbose # Verbose TCP parsing
package main
import (
@ -44,11 +42,11 @@ type BeastDumper struct {
parser *beast.Parser
decoder *modes.Decoder
stats struct {
totalMessages int64
validMessages int64
aircraftSeen map[uint32]bool
startTime time.Time
lastMessageTime time.Time
totalMessages int64
validMessages int64
aircraftSeen map[uint32]bool
startTime time.Time
lastMessageTime time.Time
}
}
@ -104,11 +102,11 @@ func NewBeastDumper(config *Config) *BeastDumper {
config: config,
decoder: modes.NewDecoder(0.0, 0.0), // beast-dump doesn't have reference position, use default
stats: struct {
totalMessages int64
validMessages int64
aircraftSeen map[uint32]bool
startTime time.Time
lastMessageTime time.Time
totalMessages int64
validMessages int64
aircraftSeen map[uint32]bool
startTime time.Time
lastMessageTime time.Time
}{
aircraftSeen: make(map[uint32]bool),
startTime: time.Now(),

15
config.json.example Normal file
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@ -0,0 +1,15 @@
{
"server": {
"address": ":8080",
"port": 8080
},
"dump1090": {
"host": "192.168.1.100",
"data_port": 30003
},
"origin": {
"latitude": 37.7749,
"longitude": -122.4194,
"name": "San Francisco"
}
}

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@ -1,10 +1,10 @@
Package: skyview
Version: 0.0.2
Version: 2.0.0
Section: net
Priority: optional
Architecture: amd64
Depends: systemd
Maintainer: Ole-Morten Duesund <glemt.net>
Maintainer: SkyView Team <admin@skyview.local>
Description: Multi-source ADS-B aircraft tracker with Beast format support
SkyView is a standalone application that connects to multiple dump1090 Beast
format TCP streams and provides a modern web frontend for aircraft tracking.
@ -20,4 +20,4 @@ Description: Multi-source ADS-B aircraft tracker with Beast format support
- Mobile-responsive design
- Systemd integration for service management
- Beast-dump utility for raw ADS-B data analysis
Homepage: https://kode.naiv.no/olemd/skyview
Homepage: https://github.com/skyview/skyview

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@ -5,34 +5,35 @@ case "$1" in
configure)
# Create skyview user and group if they don't exist
if ! getent group skyview >/dev/null 2>&1; then
addgroup --system --quiet skyview
addgroup --system skyview
fi
if ! getent passwd skyview >/dev/null 2>&1; then
adduser --system --ingroup skyview --home /var/lib/skyview \
--no-create-home --disabled-password --quiet skyview
--no-create-home --disabled-password skyview
fi
# Create directories with proper permissions
mkdir -p /var/lib/skyview /var/log/skyview >/dev/null 2>&1 || true
chown skyview:skyview /var/lib/skyview /var/log/skyview >/dev/null 2>&1 || true
chmod 755 /var/lib/skyview /var/log/skyview >/dev/null 2>&1 || true
mkdir -p /var/lib/skyview
mkdir -p /var/log/skyview
chown skyview:skyview /var/lib/skyview
chown skyview:skyview /var/log/skyview
chmod 755 /var/lib/skyview
chmod 755 /var/log/skyview
# Set permissions on config files
# Set permissions on config file
if [ -f /etc/skyview/config.json ]; then
chown root:skyview /etc/skyview/config.json >/dev/null 2>&1 || true
chmod 640 /etc/skyview/config.json >/dev/null 2>&1 || true
chown root:skyview /etc/skyview/config.json
chmod 640 /etc/skyview/config.json
fi
# Enable and start the service
systemctl daemon-reload
systemctl enable skyview.service
# Handle systemd service
systemctl daemon-reload >/dev/null 2>&1 || true
# Check if service was previously enabled
if systemctl is-enabled skyview >/dev/null 2>&1; then
# Service was enabled, restart it
systemctl restart skyview >/dev/null 2>&1 || true
fi
echo "SkyView has been installed and configured."
echo "Edit /etc/skyview/config.json to configure your dump1090 sources."
echo "Then run: systemctl start skyview"
;;
esac

BIN
debian/usr/bin/beast-dump vendored Executable file

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@ -1,4 +1,4 @@
.TH BEAST-DUMP 1 "2025-08-24" "SkyView 0.0.2" "User Commands"
.TH BEAST-DUMP 1 "2024-08-24" "SkyView 2.0.0" "User Commands"
.SH NAME
beast-dump \- Utility for analyzing raw ADS-B data in Beast binary format
.SH SYNOPSIS
@ -90,6 +90,6 @@ Beast format files typically use .bin or .beast extensions.
.BR skyview (1),
.BR dump1090 (1)
.SH BUGS
Report bugs at: https://kode.naiv.no/olemd/skyview/issues
Report bugs at: https://github.com/skyview/skyview/issues
.SH AUTHOR
Ole-Morten Duesund <glemt.net>
SkyView Team <admin@skyview.local>

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@ -1,4 +1,4 @@
.TH SKYVIEW 1 "2025-08-24" "SkyView 0.0.2" "User Commands"
.TH SKYVIEW 1 "2024-08-24" "SkyView 2.0.0" "User Commands"
.SH NAME
skyview \- Multi-source ADS-B aircraft tracker with Beast format support
.SH SYNOPSIS
@ -83,6 +83,6 @@ Coverage heatmaps and range circles
.BR beast-dump (1),
.BR dump1090 (1)
.SH BUGS
Report bugs at: https://kode.naiv.no/olemd/skyview/issues
Report bugs at: https://github.com/skyview/skyview/issues
.SH AUTHOR
Ole-Morten Duesund <glemt.net>
SkyView Team <admin@skyview.local>

View file

@ -88,12 +88,12 @@ func NewParser(r io.Reader, sourceID string) *Parser {
// ReadMessage reads and parses a single Beast message from the stream.
//
// The parsing process:
// 1. Search for the escape character (0x1A) that marks message start
// 2. Read and validate the message type byte
// 3. Read the 48-bit timestamp (big-endian, padded to 64-bit)
// 4. Read the signal level byte
// 5. Read the message payload (length depends on message type)
// 6. Process escape sequences in the payload data
// 1. Search for the escape character (0x1A) that marks message start
// 2. Read and validate the message type byte
// 3. Read the 48-bit timestamp (big-endian, padded to 64-bit)
// 4. Read the signal level byte
// 5. Read the message payload (length depends on message type)
// 6. Process escape sequences in the payload data
//
// The parser can recover from protocol errors by continuing to search for
// the next valid message boundary. Status messages are currently skipped

View file

@ -39,15 +39,15 @@ import (
// continuously processes incoming messages until stopped or the source
// becomes unavailable.
type BeastClient struct {
source *merger.Source // Source configuration and status
merger *merger.Merger // Data merger for multi-source fusion
decoder *modes.Decoder // Mode S/ADS-B message decoder
conn net.Conn // TCP connection to Beast source
parser *beast.Parser // Beast format message parser
source *merger.Source // Source configuration and status
merger *merger.Merger // Data merger for multi-source fusion
decoder *modes.Decoder // Mode S/ADS-B message decoder
conn net.Conn // TCP connection to Beast source
parser *beast.Parser // Beast format message parser
msgChan chan *beast.Message // Buffered channel for parsed messages
errChan chan error // Error reporting channel
stopChan chan struct{} // Shutdown signal channel
wg sync.WaitGroup // Wait group for goroutine coordination
errChan chan error // Error reporting channel
stopChan chan struct{} // Shutdown signal channel
wg sync.WaitGroup // Wait group for goroutine coordination
// Reconnection parameters
reconnectDelay time.Duration // Initial reconnect delay
@ -102,9 +102,9 @@ func (c *BeastClient) Start(ctx context.Context) {
// Stop gracefully shuts down the client and all associated goroutines.
//
// The shutdown process:
// 1. Signals all goroutines to stop via stopChan
// 2. Closes the TCP connection if active
// 3. Waits for all goroutines to complete
// 1. Signals all goroutines to stop via stopChan
// 2. Closes the TCP connection if active
// 3. Waits for all goroutines to complete
//
// This method blocks until the shutdown is complete.
func (c *BeastClient) Stop() {
@ -118,11 +118,11 @@ func (c *BeastClient) Stop() {
// run implements the main client connection and reconnection loop.
//
// This method handles the complete client lifecycle:
// 1. Connection establishment with timeout
// 2. Exponential backoff on connection failures
// 3. Message parsing and processing goroutine management
// 4. Connection monitoring and failure detection
// 5. Automatic reconnection on disconnection
// 1. Connection establishment with timeout
// 2. Exponential backoff on connection failures
// 3. Message parsing and processing goroutine management
// 4. Connection monitoring and failure detection
// 5. Automatic reconnection on disconnection
//
// The exponential backoff starts at reconnectDelay (5s) and doubles on each
// failure up to maxReconnect (60s), then resets on successful connection.
@ -210,10 +210,10 @@ func (c *BeastClient) readMessages() {
// processMessages runs in a dedicated goroutine to decode and merge aircraft data.
//
// For each received Beast message, this method:
// 1. Decodes the Mode S/ADS-B message payload
// 2. Extracts aircraft information (position, altitude, speed, etc.)
// 3. Updates the data merger with new aircraft state
// 4. Updates source statistics (message count)
// 1. Decodes the Mode S/ADS-B message payload
// 2. Extracts aircraft information (position, altitude, speed, etc.)
// 3. Updates the data merger with new aircraft state
// 4. Updates source statistics (message count)
//
// Invalid or unparseable messages are silently discarded to maintain
// system stability. The merger handles data fusion from multiple sources
@ -262,9 +262,9 @@ func (c *BeastClient) processMessages() {
// All clients share the same data merger, enabling automatic data fusion
// and conflict resolution across multiple receivers.
type MultiSourceClient struct {
clients []*BeastClient // Managed Beast clients
merger *merger.Merger // Shared data merger for all sources
mu sync.RWMutex // Protects clients slice
clients []*BeastClient // Managed Beast clients
merger *merger.Merger // Shared data merger for all sources
mu sync.RWMutex // Protects clients slice
}
// NewMultiSourceClient creates a client manager for multiple Beast format sources.
@ -292,9 +292,9 @@ func NewMultiSourceClient(merger *merger.Merger) *MultiSourceClient {
// AddSource registers and configures a new Beast format data source.
//
// This method:
// 1. Registers the source with the data merger
// 2. Creates a new BeastClient for the source
// 3. Adds the client to the managed clients list
// 1. Registers the source with the data merger
// 2. Creates a new BeastClient for the source
// 3. Adds the client to the managed clients list
//
// The source is not automatically started; call Start() to begin connections.
// Sources can be added before or after starting the multi-source client.

View file

@ -22,7 +22,6 @@ package merger
import (
"encoding/json"
"fmt"
"log"
"math"
"sync"
"time"
@ -34,31 +33,8 @@ import (
const (
// MaxDistance represents an infinite distance for initialization
MaxDistance = float64(999999)
// Position validation constants
MaxSpeedKnots = 2000.0 // Maximum plausible aircraft speed (roughly Mach 3 at cruise altitude)
MaxDistanceNautMiles = 500.0 // Maximum position jump distance in nautical miles
MaxAltitudeFeet = 60000 // Maximum altitude in feet (commercial ceiling ~FL600)
MinAltitudeFeet = -500 // Minimum altitude (below sea level but allow for dead sea, etc.)
// Earth coordinate bounds
MinLatitude = -90.0
MaxLatitude = 90.0
MinLongitude = -180.0
MaxLongitude = 180.0
// Conversion factors
KnotsToKmh = 1.852
NmToKm = 1.852
)
// ValidationResult represents the result of position validation checks.
type ValidationResult struct {
Valid bool // Whether the position passed all validation checks
Errors []string // List of validation failures for debugging
Warnings []string // List of potential issues (not blocking)
}
// Source represents a data source (dump1090 receiver or similar ADS-B source).
// It contains both static configuration and dynamic status information used
// for data fusion decisions and source monitoring.
@ -112,32 +88,29 @@ func (a *AircraftState) MarshalJSON() ([]byte, error) {
// Create a struct that mirrors AircraftState but with ICAO24 as string
return json.Marshal(&struct {
// From embedded modes.Aircraft
ICAO24 string `json:"ICAO24"`
Callsign string `json:"Callsign"`
Latitude float64 `json:"Latitude"`
Longitude float64 `json:"Longitude"`
Altitude int `json:"Altitude"`
BaroAltitude int `json:"BaroAltitude"`
GeomAltitude int `json:"GeomAltitude"`
VerticalRate int `json:"VerticalRate"`
GroundSpeed int `json:"GroundSpeed"`
Track int `json:"Track"`
Heading int `json:"Heading"`
Category string `json:"Category"`
Squawk string `json:"Squawk"`
Emergency string `json:"Emergency"`
OnGround bool `json:"OnGround"`
Alert bool `json:"Alert"`
SPI bool `json:"SPI"`
NACp uint8 `json:"NACp"`
NACv uint8 `json:"NACv"`
SIL uint8 `json:"SIL"`
TransponderCapability string `json:"TransponderCapability"`
TransponderLevel uint8 `json:"TransponderLevel"`
SignalQuality string `json:"SignalQuality"`
SelectedAltitude int `json:"SelectedAltitude"`
SelectedHeading float64 `json:"SelectedHeading"`
BaroSetting float64 `json:"BaroSetting"`
ICAO24 string `json:"ICAO24"`
Callsign string `json:"Callsign"`
Latitude float64 `json:"Latitude"`
Longitude float64 `json:"Longitude"`
Altitude int `json:"Altitude"`
BaroAltitude int `json:"BaroAltitude"`
GeomAltitude int `json:"GeomAltitude"`
VerticalRate int `json:"VerticalRate"`
GroundSpeed int `json:"GroundSpeed"`
Track int `json:"Track"`
Heading int `json:"Heading"`
Category string `json:"Category"`
Squawk string `json:"Squawk"`
Emergency string `json:"Emergency"`
OnGround bool `json:"OnGround"`
Alert bool `json:"Alert"`
SPI bool `json:"SPI"`
NACp uint8 `json:"NACp"`
NACv uint8 `json:"NACv"`
SIL uint8 `json:"SIL"`
SelectedAltitude int `json:"SelectedAltitude"`
SelectedHeading float64 `json:"SelectedHeading"`
BaroSetting float64 `json:"BaroSetting"`
// From AircraftState
Sources map[string]*SourceData `json:"sources"`
@ -159,32 +132,29 @@ func (a *AircraftState) MarshalJSON() ([]byte, error) {
Flag string `json:"flag"`
}{
// Copy all fields from Aircraft
ICAO24: fmt.Sprintf("%06X", a.Aircraft.ICAO24),
Callsign: a.Aircraft.Callsign,
Latitude: a.Aircraft.Latitude,
Longitude: a.Aircraft.Longitude,
Altitude: a.Aircraft.Altitude,
BaroAltitude: a.Aircraft.BaroAltitude,
GeomAltitude: a.Aircraft.GeomAltitude,
VerticalRate: a.Aircraft.VerticalRate,
GroundSpeed: a.Aircraft.GroundSpeed,
Track: a.Aircraft.Track,
Heading: a.Aircraft.Heading,
Category: a.Aircraft.Category,
Squawk: a.Aircraft.Squawk,
Emergency: a.Aircraft.Emergency,
OnGround: a.Aircraft.OnGround,
Alert: a.Aircraft.Alert,
SPI: a.Aircraft.SPI,
NACp: a.Aircraft.NACp,
NACv: a.Aircraft.NACv,
SIL: a.Aircraft.SIL,
TransponderCapability: a.Aircraft.TransponderCapability,
TransponderLevel: a.Aircraft.TransponderLevel,
SignalQuality: a.Aircraft.SignalQuality,
SelectedAltitude: a.Aircraft.SelectedAltitude,
SelectedHeading: a.Aircraft.SelectedHeading,
BaroSetting: a.Aircraft.BaroSetting,
ICAO24: fmt.Sprintf("%06X", a.Aircraft.ICAO24),
Callsign: a.Aircraft.Callsign,
Latitude: a.Aircraft.Latitude,
Longitude: a.Aircraft.Longitude,
Altitude: a.Aircraft.Altitude,
BaroAltitude: a.Aircraft.BaroAltitude,
GeomAltitude: a.Aircraft.GeomAltitude,
VerticalRate: a.Aircraft.VerticalRate,
GroundSpeed: a.Aircraft.GroundSpeed,
Track: a.Aircraft.Track,
Heading: a.Aircraft.Heading,
Category: a.Aircraft.Category,
Squawk: a.Aircraft.Squawk,
Emergency: a.Aircraft.Emergency,
OnGround: a.Aircraft.OnGround,
Alert: a.Aircraft.Alert,
SPI: a.Aircraft.SPI,
NACp: a.Aircraft.NACp,
NACv: a.Aircraft.NACv,
SIL: a.Aircraft.SIL,
SelectedAltitude: a.Aircraft.SelectedAltitude,
SelectedHeading: a.Aircraft.SelectedHeading,
BaroSetting: a.Aircraft.BaroSetting,
// Copy all fields from AircraftState
Sources: a.Sources,
@ -268,7 +238,7 @@ type Merger struct {
sources map[string]*Source // Source ID -> source information
icaoDB *icao.Database // ICAO country lookup database
mu sync.RWMutex // Protects all maps and slices
historyLimit int // Maximum history points to retain
historyLimit int // Maximum history points to retain
staleTimeout time.Duration // Time before aircraft considered stale (15 seconds)
updateMetrics map[uint32]*updateMetric // ICAO24 -> update rate calculation data
}
@ -321,13 +291,13 @@ func (m *Merger) AddSource(source *Source) {
// UpdateAircraft merges new aircraft data from a source using intelligent fusion strategies.
//
// This is the core method of the merger, handling:
// 1. Aircraft state creation for new aircraft
// 2. Source data tracking and statistics
// 3. Multi-source data fusion with conflict resolution
// 4. Historical data updates with retention limits
// 5. Distance and bearing calculations
// 6. Update rate metrics
// 7. Source status maintenance
// 1. Aircraft state creation for new aircraft
// 2. Source data tracking and statistics
// 3. Multi-source data fusion with conflict resolution
// 4. Historical data updates with retention limits
// 5. Distance and bearing calculations
// 6. Update rate metrics
// 7. Source status maintenance
//
// Data fusion strategies:
// - Position: Use source with strongest signal
@ -447,46 +417,28 @@ func (m *Merger) UpdateAircraft(sourceID string, aircraft *modes.Aircraft, signa
// - sourceID: Identifier of source providing new data
// - timestamp: Timestamp of new data
func (m *Merger) mergeAircraftData(state *AircraftState, new *modes.Aircraft, sourceID string, timestamp time.Time) {
// Position - use source with best signal or most recent, but validate first
// Position - use source with best signal or most recent
if new.Latitude != 0 && new.Longitude != 0 {
// Always validate position before considering update
validation := m.validatePosition(new, state, timestamp)
updatePosition := false
if !validation.Valid {
// Log validation errors and skip position update
icaoHex := fmt.Sprintf("%06X", new.ICAO24)
for _, err := range validation.Errors {
log.Printf("[POSITION_VALIDATION] ICAO %s: REJECTED position update - %s", icaoHex, err)
}
} else {
// Position is valid, proceed with normal logic
updatePosition := false
if state.Latitude == 0 {
// First position update
if state.Latitude == 0 {
// First position update
updatePosition = true
} else if srcData, ok := state.Sources[sourceID]; ok {
// Use position from source with strongest signal
currentBest := m.getBestSignalSource(state)
if currentBest == "" || srcData.SignalLevel > state.Sources[currentBest].SignalLevel {
updatePosition = true
} else if currentBest == sourceID {
// Same source as current best - allow updates for moving aircraft
updatePosition = true
} else if srcData, ok := state.Sources[sourceID]; ok {
// Use position from source with strongest signal
currentBest := m.getBestSignalSource(state)
if currentBest == "" || srcData.SignalLevel > state.Sources[currentBest].SignalLevel {
updatePosition = true
} else if currentBest == sourceID {
// Same source as current best - allow updates for moving aircraft
updatePosition = true
}
}
if updatePosition {
state.Latitude = new.Latitude
state.Longitude = new.Longitude
state.PositionSource = sourceID
}
}
// Log warnings even if position is valid
for _, warning := range validation.Warnings {
icaoHex := fmt.Sprintf("%06X", new.ICAO24)
log.Printf("[POSITION_VALIDATION] ICAO %s: WARNING - %s", icaoHex, warning)
if updatePosition {
state.Latitude = new.Latitude
state.Longitude = new.Longitude
state.PositionSource = sourceID
}
}
@ -557,27 +509,6 @@ func (m *Merger) mergeAircraftData(state *AircraftState, new *modes.Aircraft, so
if new.BaroSetting != 0 {
state.BaroSetting = new.BaroSetting
}
// Transponder information - use most recent non-empty
if new.TransponderCapability != "" {
state.TransponderCapability = new.TransponderCapability
}
if new.TransponderLevel > 0 {
state.TransponderLevel = new.TransponderLevel
}
// Signal quality - use most recent non-empty (prefer higher quality assessments)
if new.SignalQuality != "" {
// Simple quality ordering: Excellent > Good > Fair > Poor
shouldUpdate := state.SignalQuality == "" ||
(new.SignalQuality == "Excellent") ||
(new.SignalQuality == "Good" && state.SignalQuality != "Excellent") ||
(new.SignalQuality == "Fair" && state.SignalQuality == "Poor")
if shouldUpdate {
state.SignalQuality = new.SignalQuality
}
}
}
// updateHistories adds data points to historical tracking arrays.
@ -599,31 +530,14 @@ func (m *Merger) mergeAircraftData(state *AircraftState, new *modes.Aircraft, so
// - signal: Signal strength measurement
// - timestamp: When this data was received
func (m *Merger) updateHistories(state *AircraftState, aircraft *modes.Aircraft, sourceID string, signal float64, timestamp time.Time) {
// Position history with validation
// Position history
if aircraft.Latitude != 0 && aircraft.Longitude != 0 {
// Validate position before adding to history
validation := m.validatePosition(aircraft, state, timestamp)
if validation.Valid {
state.PositionHistory = append(state.PositionHistory, PositionPoint{
Time: timestamp,
Latitude: aircraft.Latitude,
Longitude: aircraft.Longitude,
Source: sourceID,
})
} else {
// Log validation errors for debugging
icaoHex := fmt.Sprintf("%06X", aircraft.ICAO24)
for _, err := range validation.Errors {
log.Printf("[POSITION_VALIDATION] ICAO %s: REJECTED - %s", icaoHex, err)
}
}
// Log warnings even for valid positions
for _, warning := range validation.Warnings {
icaoHex := fmt.Sprintf("%06X", aircraft.ICAO24)
log.Printf("[POSITION_VALIDATION] ICAO %s: WARNING - %s", icaoHex, warning)
}
state.PositionHistory = append(state.PositionHistory, PositionPoint{
Time: timestamp,
Latitude: aircraft.Latitude,
Longitude: aircraft.Longitude,
Source: sourceID,
})
}
// Signal history
@ -671,10 +585,10 @@ func (m *Merger) updateHistories(state *AircraftState, aircraft *modes.Aircraft,
// updateUpdateRate calculates and maintains the message update rate for an aircraft.
//
// The calculation:
// 1. Records the timestamp of each update
// 2. Maintains a sliding 30-second window of updates
// 3. Calculates updates per second over this window
// 4. Updates the aircraft's UpdateRate field
// 1. Records the timestamp of each update
// 2. Maintains a sliding 30-second window of updates
// 3. Calculates updates per second over this window
// 4. Updates the aircraft's UpdateRate field
//
// This provides real-time feedback on data quality and can help identify
// aircraft that are updating frequently (close, good signal) vs infrequently
@ -730,10 +644,10 @@ func (m *Merger) getBestSignalSource(state *AircraftState) string {
// GetAircraft returns a snapshot of all current aircraft states.
//
// This method:
// 1. Filters out stale aircraft (older than staleTimeout)
// 2. Calculates current age for each aircraft
// 3. Determines closest receiver distance and bearing
// 4. Returns copies to prevent external modification
// 1. Filters out stale aircraft (older than staleTimeout)
// 2. Calculates current age for each aircraft
// 3. Determines closest receiver distance and bearing
// 4. Returns copies to prevent external modification
//
// The returned map uses ICAO24 addresses as keys and can be safely
// used by multiple goroutines without affecting the internal state.
@ -895,130 +809,6 @@ func calculateDistanceBearing(lat1, lon1, lat2, lon2 float64) (float64, float64)
return distance, bearing
}
// validatePosition performs comprehensive validation of aircraft position data to filter out
// obviously incorrect flight paths and implausible position updates.
//
// This function implements multiple validation checks to improve data quality:
//
// 1. **Coordinate Validation**: Ensures latitude/longitude are within Earth's bounds
// 2. **Altitude Validation**: Rejects impossible altitudes (negative or > FL600)
// 3. **Speed Validation**: Calculates implied speed and rejects >Mach 3 movements
// 4. **Distance Validation**: Rejects position jumps >500nm without time justification
// 5. **Time Validation**: Ensures timestamps are chronologically consistent
//
// Parameters:
// - aircraft: New aircraft position data to validate
// - state: Current aircraft state with position history
// - timestamp: Timestamp of the new position data
//
// Returns:
// - ValidationResult with valid flag and detailed error/warning messages
func (m *Merger) validatePosition(aircraft *modes.Aircraft, state *AircraftState, timestamp time.Time) *ValidationResult {
result := &ValidationResult{
Valid: true,
Errors: make([]string, 0),
Warnings: make([]string, 0),
}
// Skip validation if no position data
if aircraft.Latitude == 0 && aircraft.Longitude == 0 {
return result // No position to validate
}
// 1. Geographic coordinate validation
if aircraft.Latitude < MinLatitude || aircraft.Latitude > MaxLatitude {
result.Valid = false
result.Errors = append(result.Errors, fmt.Sprintf("Invalid latitude: %.6f (must be between %.1f and %.1f)",
aircraft.Latitude, MinLatitude, MaxLatitude))
}
if aircraft.Longitude < MinLongitude || aircraft.Longitude > MaxLongitude {
result.Valid = false
result.Errors = append(result.Errors, fmt.Sprintf("Invalid longitude: %.6f (must be between %.1f and %.1f)",
aircraft.Longitude, MinLongitude, MaxLongitude))
}
// 2. Altitude validation
if aircraft.Altitude != 0 { // Only validate non-zero altitudes
if aircraft.Altitude < MinAltitudeFeet {
result.Valid = false
result.Errors = append(result.Errors, fmt.Sprintf("Impossible altitude: %d feet (below minimum %d)",
aircraft.Altitude, MinAltitudeFeet))
}
if aircraft.Altitude > MaxAltitudeFeet {
result.Valid = false
result.Errors = append(result.Errors, fmt.Sprintf("Impossible altitude: %d feet (above maximum %d)",
aircraft.Altitude, MaxAltitudeFeet))
}
}
// 3. Speed and distance validation (requires position history)
if len(state.PositionHistory) > 0 && state.Latitude != 0 && state.Longitude != 0 {
lastPos := state.PositionHistory[len(state.PositionHistory)-1]
// Calculate distance between positions
distance, _ := calculateDistanceBearing(lastPos.Latitude, lastPos.Longitude,
aircraft.Latitude, aircraft.Longitude)
// Calculate time difference
timeDiff := timestamp.Sub(lastPos.Time).Seconds()
if timeDiff > 0 {
// Calculate implied speed in knots
distanceNm := distance / NmToKm
speedKnots := (distanceNm / timeDiff) * 3600 // Convert to knots per hour
// Distance validation: reject jumps >500nm
if distanceNm > MaxDistanceNautMiles {
result.Valid = false
result.Errors = append(result.Errors, fmt.Sprintf("Impossible position jump: %.1f nm in %.1f seconds (max allowed: %.1f nm)",
distanceNm, timeDiff, MaxDistanceNautMiles))
}
// Speed validation: reject >2000 knots (roughly Mach 3)
if speedKnots > MaxSpeedKnots {
result.Valid = false
result.Errors = append(result.Errors, fmt.Sprintf("Impossible speed: %.0f knots (max allowed: %.0f knots)",
speedKnots, MaxSpeedKnots))
}
// Warning for high but possible speeds (>800 knots)
if speedKnots > 800 && speedKnots <= MaxSpeedKnots {
result.Warnings = append(result.Warnings, fmt.Sprintf("High speed detected: %.0f knots", speedKnots))
}
} else if timeDiff < 0 {
// 4. Time validation: reject out-of-order timestamps
result.Valid = false
result.Errors = append(result.Errors, fmt.Sprintf("Out-of-order timestamp: %.1f seconds in the past", -timeDiff))
}
}
// 5. Aircraft-specific validations based on reported speed vs. position
if aircraft.GroundSpeed > 0 && len(state.PositionHistory) > 0 {
// Check if reported ground speed is consistent with position changes
lastPos := state.PositionHistory[len(state.PositionHistory)-1]
distance, _ := calculateDistanceBearing(lastPos.Latitude, lastPos.Longitude,
aircraft.Latitude, aircraft.Longitude)
timeDiff := timestamp.Sub(lastPos.Time).Seconds()
if timeDiff > 0 {
distanceNm := distance / NmToKm
impliedSpeed := (distanceNm / timeDiff) * 3600
reportedSpeed := float64(aircraft.GroundSpeed)
// Warning if speeds differ significantly (>100 knots difference)
if math.Abs(impliedSpeed-reportedSpeed) > 100 && reportedSpeed > 50 {
result.Warnings = append(result.Warnings,
fmt.Sprintf("Speed inconsistency: reported %d knots, implied %.0f knots",
aircraft.GroundSpeed, impliedSpeed))
}
}
}
return result
}
// Close closes the merger and releases resources
func (m *Merger) Close() error {
m.mu.Lock()

View file

@ -107,43 +107,36 @@ const (
// depending on the messages received and aircraft capabilities.
type Aircraft struct {
// Core Identification
ICAO24 uint32 // 24-bit ICAO aircraft address (unique identifier)
Callsign string // 8-character flight callsign (from identification messages)
ICAO24 uint32 // 24-bit ICAO aircraft address (unique identifier)
Callsign string // 8-character flight callsign (from identification messages)
// Position and Navigation
Latitude float64 // Position latitude in decimal degrees
Longitude float64 // Position longitude in decimal degrees
Altitude int // Altitude in feet (barometric or geometric)
BaroAltitude int // Barometric altitude in feet (QNH corrected)
GeomAltitude int // Geometric altitude in feet (GNSS height)
Latitude float64 // Position latitude in decimal degrees
Longitude float64 // Position longitude in decimal degrees
Altitude int // Altitude in feet (barometric or geometric)
BaroAltitude int // Barometric altitude in feet (QNH corrected)
GeomAltitude int // Geometric altitude in feet (GNSS height)
// Motion and Dynamics
VerticalRate int // Vertical rate in feet per minute (climb/descent)
GroundSpeed int // Ground speed in knots (integer)
Track int // Track angle in degrees (0-359, integer)
Heading int // Aircraft heading in degrees (magnetic, integer)
VerticalRate int // Vertical rate in feet per minute (climb/descent)
GroundSpeed int // Ground speed in knots (integer)
Track int // Track angle in degrees (0-359, integer)
Heading int // Aircraft heading in degrees (magnetic, integer)
// Aircraft Information
Category string // Aircraft category (size, type, performance)
Squawk string // 4-digit transponder squawk code (octal)
Category string // Aircraft category (size, type, performance)
Squawk string // 4-digit transponder squawk code (octal)
// Status and Alerts
Emergency string // Emergency/priority status description
OnGround bool // Aircraft is on ground (surface movement)
Alert bool // Alert flag (ATC attention required)
SPI bool // Special Position Identification (pilot activated)
Emergency string // Emergency/priority status description
OnGround bool // Aircraft is on ground (surface movement)
Alert bool // Alert flag (ATC attention required)
SPI bool // Special Position Identification (pilot activated)
// Data Quality Indicators
NACp uint8 // Navigation Accuracy Category - Position (0-11)
NACv uint8 // Navigation Accuracy Category - Velocity (0-4)
SIL uint8 // Surveillance Integrity Level (0-3)
// Transponder Information
TransponderCapability string // Transponder capability level (from DF11 messages)
TransponderLevel uint8 // Transponder level (0-7 from capability field)
// Combined Data Quality Assessment
SignalQuality string // Combined assessment of position/velocity accuracy and integrity
NACp uint8 // Navigation Accuracy Category - Position (0-11)
NACv uint8 // Navigation Accuracy Category - Velocity (0-4)
SIL uint8 // Surveillance Integrity Level (0-3)
// Autopilot/Flight Management
SelectedAltitude int // MCP/FCU selected altitude in feet
@ -206,10 +199,10 @@ func NewDecoder(refLat, refLon float64) *Decoder {
// Decode processes a Mode S message and extracts all available aircraft information.
//
// This is the main entry point for message decoding. The method:
// 1. Validates message length and extracts the Downlink Format (DF)
// 2. Extracts the ICAO24 aircraft address
// 3. Routes to appropriate decoder based on message type
// 4. Returns populated Aircraft struct with available data
// 1. Validates message length and extracts the Downlink Format (DF)
// 2. Extracts the ICAO24 aircraft address
// 3. Routes to appropriate decoder based on message type
// 4. Returns populated Aircraft struct with available data
//
// Different message types provide different information:
// - DF4/20: Altitude only
@ -238,32 +231,14 @@ func (d *Decoder) Decode(data []byte) (*Aircraft, error) {
}
switch df {
case DF0:
// Short Air-Air Surveillance (ACAS)
aircraft.Altitude = d.decodeAltitude(data)
case DF4, DF20:
aircraft.Altitude = d.decodeAltitude(data)
case DF5, DF21:
aircraft.Squawk = d.decodeSquawk(data)
case DF11:
// All-Call Reply - extract capability and interrogator identifier
d.decodeAllCallReply(data, aircraft)
case DF16:
// Long Air-Air Surveillance (ACAS with altitude)
aircraft.Altitude = d.decodeAltitude(data)
case DF17, DF18:
return d.decodeExtendedSquitter(data, aircraft)
case DF19:
// Military Extended Squitter - similar to DF17/18 but with military codes
return d.decodeMilitaryExtendedSquitter(data, aircraft)
case DF24:
// Comm-D Enhanced Length Message - variable length data
d.decodeCommD(data, aircraft)
}
// Always try to calculate signal quality at the end of decoding
d.calculateSignalQuality(aircraft)
return aircraft, nil
}
@ -336,12 +311,6 @@ func (d *Decoder) decodeExtendedSquitter(data []byte, aircraft *Aircraft) (*Airc
d.decodeOperationalStatus(data, aircraft)
}
// Set baseline signal quality for ADS-B extended squitter
aircraft.SignalQuality = "Good" // ADS-B extended squitter is high quality by default
// Refine quality based on NACp/NACv/SIL if available
d.calculateSignalQuality(aircraft)
return aircraft, nil
}
@ -400,10 +369,10 @@ func (d *Decoder) decodeIdentification(data []byte, aircraft *Aircraft) {
// - Even/odd flag for CPR decoding
//
// CPR (Compact Position Reporting) Process:
// 1. Extract the even/odd flag and CPR lat/lon values
// 2. Normalize CPR values to 0-1 range (divide by 2^17)
// 3. Store values for this aircraft's ICAO address
// 4. Attempt position decoding if both even and odd messages are available
// 1. Extract the even/odd flag and CPR lat/lon values
// 2. Normalize CPR values to 0-1 range (divide by 2^17)
// 3. Store values for this aircraft's ICAO address
// 4. Attempt position decoding if both even and odd messages are available
//
// The actual position calculation requires both even and odd messages to
// resolve the ambiguity inherent in the compressed encoding format.
@ -434,20 +403,8 @@ func (d *Decoder) decodeAirbornePosition(data []byte, aircraft *Aircraft) {
}
d.mu.Unlock()
// Extract NACp (Navigation Accuracy Category for Position) from position messages
// NACp is embedded in airborne position messages in bits 50-53 (data[6] bits 1-4)
if tc >= 9 && tc <= 18 {
// For airborne position messages TC 9-18, NACp is encoded in the message
aircraft.NACp = uint8(tc - 8) // TC 9->NACp 1, TC 10->NACp 2, etc.
// Note: This is a simplified mapping. Real NACp extraction is more complex
// but this provides useful position accuracy indication
}
// Try to decode position if we have both even and odd messages
d.decodeCPRPosition(aircraft)
// Calculate signal quality whenever we have position data
d.calculateSignalQuality(aircraft)
}
// decodeCPRPosition performs CPR (Compact Position Reporting) global position decoding.
@ -892,9 +849,6 @@ func (d *Decoder) decodeOperationalStatus(data []byte, aircraft *Aircraft) {
aircraft.NACp = (data[7] >> 4) & 0x0F
aircraft.NACv = data[7] & 0x0F
aircraft.SIL = (data[8] >> 6) & 0x03
// Calculate combined signal quality from NACp, NACv, and SIL
d.calculateSignalQuality(aircraft)
}
// decodeSurfacePosition extracts position and movement data for aircraft on the ground.
@ -986,164 +940,3 @@ func (d *Decoder) decodeGroundSpeed(movement uint8) float64 {
}
return 0
}
// decodeAllCallReply extracts capability and interrogator identifier from DF11 messages.
//
// DF11 All-Call Reply messages contain:
// - Capability (CA) field (3 bits): transponder capabilities and modes
// - Interrogator Identifier (II) field (4 bits): which radar interrogated
// - ICAO24 address (24 bits): aircraft identifier
//
// The capability field indicates transponder features and operational modes:
// - 0: Level 1 transponder
// - 1: Level 2 transponder
// - 2: Level 2+ transponder with additional capabilities
// - 3: Level 2+ transponder with enhanced surveillance
// - 4: Level 2+ transponder with enhanced surveillance and extended squitter
// - 5: Level 2+ transponder with enhanced surveillance, extended squitter, and enhanced surveillance capability
// - 6: Level 2+ transponder with enhanced surveillance, extended squitter, and enhanced surveillance capability
// - 7: Level 2+ transponder, downlink request value is 0, or the flight status is alert, SPI, or emergency
//
// Parameters:
// - data: 7-byte DF11 message
// - aircraft: Aircraft struct to populate
func (d *Decoder) decodeAllCallReply(data []byte, aircraft *Aircraft) {
if len(data) < 7 {
return
}
// Extract Capability (CA) - bits 6-8 of first byte
capability := (data[0] >> 0) & 0x07
// Extract Interrogator Identifier (II) - would be in control field if present
// For DF11, this information is typically implied by the interrogating radar
// Store transponder capability information in dedicated fields
aircraft.TransponderLevel = capability
switch capability {
case 0:
aircraft.TransponderCapability = "Level 1"
case 1:
aircraft.TransponderCapability = "Level 2"
case 2, 3:
aircraft.TransponderCapability = "Level 2+"
case 4, 5, 6:
aircraft.TransponderCapability = "Enhanced"
case 7:
aircraft.TransponderCapability = "Alert/Emergency"
}
}
// decodeMilitaryExtendedSquitter processes DF19 military extended squitter messages.
//
// DF19 messages have the same structure as DF17/18 ADS-B extended squitter but
// may contain military-specific type codes or enhanced data formats.
// This implementation treats them similarly to civilian extended squitter
// but could be extended for military-specific capabilities.
//
// Parameters:
// - data: 14-byte DF19 message
// - aircraft: Aircraft struct to populate
//
// Returns updated Aircraft struct or error for malformed messages.
func (d *Decoder) decodeMilitaryExtendedSquitter(data []byte, aircraft *Aircraft) (*Aircraft, error) {
if len(data) != 14 {
return nil, fmt.Errorf("invalid military extended squitter length: %d bytes", len(data))
}
// For now, treat military extended squitter similar to civilian
// Could be enhanced to handle military-specific type codes
return d.decodeExtendedSquitter(data, aircraft)
}
// decodeCommD extracts data from DF24 Comm-D Enhanced Length Messages.
//
// DF24 messages are variable-length data link communications that can contain:
// - Weather information and updates
// - Flight plan modifications
// - Controller-pilot data link messages
// - Air traffic management information
// - Future air navigation system data
//
// Due to the complexity and variety of DF24 message content, this implementation
// provides basic structure extraction. Full decoding would require extensive
// knowledge of specific data link protocols and message formats.
//
// Parameters:
// - data: Variable-length DF24 message (minimum 7 bytes)
// - aircraft: Aircraft struct to populate
func (d *Decoder) decodeCommD(data []byte, aircraft *Aircraft) {
if len(data) < 7 {
return
}
// DF24 messages contain variable data that would require protocol-specific decoding
// For now, we note that this is a data communication message but don't overwrite aircraft category
// Could set a separate field for message type if needed in the future
// The actual message content would require:
// - Protocol identifier extraction
// - Message type determination
// - Format-specific field extraction
// - Possible message reassembly for multi-part messages
//
// This could be extended based on specific requirements and available documentation
}
// calculateSignalQuality combines NACp, NACv, and SIL into an overall data quality assessment.
//
// This function provides a human-readable quality indicator that considers:
// - Position accuracy (NACp): How precise the aircraft's position data is
// - Velocity accuracy (NACv): How precise the speed/heading data is
// - Surveillance integrity (SIL): How reliable/trustworthy the data is
//
// The algorithm prioritizes integrity first (SIL), then position accuracy (NACp),
// then velocity accuracy (NACv) to provide a meaningful overall assessment.
//
// Quality levels:
// - "Excellent": High integrity with very precise position/velocity
// - "Good": Good integrity with reasonable precision
// - "Fair": Moderate quality suitable for tracking
// - "Poor": Low quality but still usable
// - "Unknown": No quality indicators available
//
// Parameters:
// - aircraft: Aircraft struct containing NACp, NACv, and SIL values
func (d *Decoder) calculateSignalQuality(aircraft *Aircraft) {
nacp := aircraft.NACp
nacv := aircraft.NACv
sil := aircraft.SIL
// If no quality indicators are available, don't set anything
if nacp == 0 && nacv == 0 && sil == 0 {
// Don't overwrite existing quality assessment
return
}
// Excellent: High integrity with high accuracy OR very high accuracy alone
if (sil >= 2 && nacp >= 9) || nacp >= 10 {
aircraft.SignalQuality = "Excellent"
return
}
// Good: Good integrity with moderate accuracy OR high accuracy alone
if (sil >= 2 && nacp >= 6) || (sil >= 1 && nacp >= 9) || nacp >= 8 {
aircraft.SignalQuality = "Good"
return
}
// Fair: Some integrity with basic accuracy OR moderate accuracy alone
if (sil >= 1 && nacp >= 3) || nacp >= 5 {
aircraft.SignalQuality = "Fair"
return
}
// Poor: Low but usable quality indicators
if sil > 0 || nacp >= 1 || nacv > 0 {
aircraft.SignalQuality = "Poor"
return
}
// Default fallback
aircraft.SignalQuality = ""
}

View file

@ -22,7 +22,6 @@ import (
"net/http"
"path"
"strconv"
"strings"
"sync"
"time"
@ -36,8 +35,8 @@ import (
// This is used as the center point for the web map interface and for
// distance calculations in coverage analysis.
type OriginConfig struct {
Latitude float64 `json:"latitude"` // Reference latitude in decimal degrees
Longitude float64 `json:"longitude"` // Reference longitude in decimal degrees
Latitude float64 `json:"latitude"` // Reference latitude in decimal degrees
Longitude float64 `json:"longitude"` // Reference longitude in decimal degrees
Name string `json:"name,omitempty"` // Descriptive name for the origin point
}
@ -52,12 +51,11 @@ type OriginConfig struct {
// - Concurrent broadcast system for WebSocket clients
// - CORS support for cross-origin web applications
type Server struct {
host string // Bind address for HTTP server
port int // TCP port for HTTP server
merger *merger.Merger // Data source for aircraft information
staticFiles embed.FS // Embedded static web assets
server *http.Server // HTTP server instance
origin OriginConfig // Geographic reference point
port int // TCP port for HTTP server
merger *merger.Merger // Data source for aircraft information
staticFiles embed.FS // Embedded static web assets
server *http.Server // HTTP server instance
origin OriginConfig // Geographic reference point
// WebSocket management
wsClients map[*websocket.Conn]bool // Active WebSocket client connections
@ -65,8 +63,8 @@ type Server struct {
upgrader websocket.Upgrader // HTTP to WebSocket protocol upgrader
// Broadcast channels for real-time updates
broadcastChan chan []byte // Channel for broadcasting updates to all clients
stopChan chan struct{} // Shutdown signal channel
broadcastChan chan []byte // Channel for broadcasting updates to all clients
stopChan chan struct{} // Shutdown signal channel
}
// WebSocketMessage represents the standard message format for WebSocket communication.
@ -87,7 +85,7 @@ type AircraftUpdate struct {
Stats map[string]interface{} `json:"stats"` // System statistics and metrics
}
// NewWebServer creates a new HTTP server instance for serving the SkyView web interface.
// NewServer creates a new HTTP server instance for serving the SkyView web interface.
//
// The server is configured with:
// - WebSocket upgrader allowing all origins (suitable for development)
@ -95,16 +93,14 @@ type AircraftUpdate struct {
// - Read/Write buffers optimized for aircraft data messages
//
// Parameters:
// - host: Bind address (empty for all interfaces, "localhost" for local only)
// - port: TCP port number for the HTTP server
// - merger: Data merger instance providing aircraft information
// - staticFiles: Embedded filesystem containing web assets
// - origin: Geographic reference point for the map interface
//
// Returns a configured but not yet started server instance.
func NewWebServer(host string, port int, merger *merger.Merger, staticFiles embed.FS, origin OriginConfig) *Server {
func NewServer(port int, merger *merger.Merger, staticFiles embed.FS, origin OriginConfig) *Server {
return &Server{
host: host,
port: port,
merger: merger,
staticFiles: staticFiles,
@ -125,9 +121,9 @@ func NewWebServer(host string, port int, merger *merger.Merger, staticFiles embe
// Start begins serving HTTP requests and WebSocket connections.
//
// This method starts several background routines:
// 1. Broadcast routine - handles WebSocket message distribution
// 2. Periodic update routine - sends regular updates to WebSocket clients
// 3. HTTP server - serves API endpoints and static files
// 1. Broadcast routine - handles WebSocket message distribution
// 2. Periodic update routine - sends regular updates to WebSocket clients
// 3. HTTP server - serves API endpoints and static files
//
// The method blocks until the server encounters an error or is shut down.
// Use Stop() for graceful shutdown.
@ -143,15 +139,8 @@ func (s *Server) Start() error {
// Setup routes
router := s.setupRoutes()
// Format address correctly for IPv6
addr := fmt.Sprintf("%s:%d", s.host, s.port)
if strings.Contains(s.host, ":") {
// IPv6 address needs brackets
addr = fmt.Sprintf("[%s]:%d", s.host, s.port)
}
s.server = &http.Server{
Addr: addr,
Addr: fmt.Sprintf(":%d", s.port),
Handler: router,
}
@ -161,9 +150,9 @@ func (s *Server) Start() error {
// Stop gracefully shuts down the server and all background routines.
//
// This method:
// 1. Signals all background routines to stop via stopChan
// 2. Shuts down the HTTP server with a 5-second timeout
// 3. Closes WebSocket connections
// 1. Signals all background routines to stop via stopChan
// 2. Shuts down the HTTP server with a 5-second timeout
// 3. Closes WebSocket connections
//
// The shutdown is designed to be safe and allow in-flight requests to complete.
func (s *Server) Stop() {
@ -393,10 +382,10 @@ func (s *Server) handleGetCoverage(w http.ResponseWriter, r *http.Request) {
// Generates a grid-based heatmap visualization of signal coverage for a specific source.
//
// The heatmap is computed by:
// 1. Finding geographic bounds of all aircraft positions for the source
// 2. Creating a 100x100 grid covering the bounds
// 3. Accumulating signal strength values in each grid cell
// 4. Returning the grid data with boundary coordinates
// 1. Finding geographic bounds of all aircraft positions for the source
// 2. Creating a 100x100 grid covering the bounds
// 3. Accumulating signal strength values in each grid cell
// 4. Returning the grid data with boundary coordinates
//
// This provides a density-based visualization of where the source receives
// the strongest signals, useful for coverage analysis and antenna optimization.
@ -467,11 +456,11 @@ func (s *Server) handleGetHeatmap(w http.ResponseWriter, r *http.Request) {
// handleWebSocket manages WebSocket connections for real-time aircraft data streaming.
//
// This handler:
// 1. Upgrades the HTTP connection to WebSocket protocol
// 2. Registers the client for broadcast updates
// 3. Sends initial data snapshot to the client
// 4. Handles client messages (currently just ping/pong for keepalive)
// 5. Cleans up the connection when the client disconnects
// 1. Upgrades the HTTP connection to WebSocket protocol
// 2. Registers the client for broadcast updates
// 3. Sends initial data snapshot to the client
// 4. Handles client messages (currently just ping/pong for keepalive)
// 5. Cleans up the connection when the client disconnects
//
// WebSocket clients receive periodic updates with current aircraft positions,
// source status, and system statistics. The connection is kept alive until
@ -599,11 +588,11 @@ func (s *Server) periodicUpdateRoutine() {
// broadcastUpdate creates and queues an aircraft update message for WebSocket clients.
//
// This function:
// 1. Collects current aircraft data from the merger
// 2. Filters aircraft to only include "useful" ones (with position or callsign)
// 3. Formats the data as a WebSocketMessage with type "aircraft_update"
// 4. Converts ICAO addresses to hex strings for JSON compatibility
// 5. Queues the message for broadcast (non-blocking)
// 1. Collects current aircraft data from the merger
// 2. Filters aircraft to only include "useful" ones (with position or callsign)
// 3. Formats the data as a WebSocketMessage with type "aircraft_update"
// 4. Converts ICAO addresses to hex strings for JSON compatibility
// 5. Queues the message for broadcast (non-blocking)
//
// If the broadcast channel is full, the update is dropped to prevent blocking.
// This ensures the system continues operating even if WebSocket clients
@ -780,11 +769,11 @@ func (s *Server) handleDebugAircraft(w http.ResponseWriter, r *http.Request) {
}
response := map[string]interface{}{
"timestamp": time.Now().Unix(),
"all_aircraft": allAircraftMap,
"timestamp": time.Now().Unix(),
"all_aircraft": allAircraftMap,
"filtered_aircraft": filteredAircraftMap,
"all_count": len(allAircraftMap),
"filtered_count": len(filteredAircraftMap),
"all_count": len(allAircraftMap),
"filtered_count": len(filteredAircraftMap),
}
w.Header().Set("Content-Type", "application/json")

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@ -0,0 +1,15 @@
{
"server": {
"address": ":8080",
"port": 8080
},
"dump1090": {
"host": "svovel",
"data_port": 30003
},
"origin": {
"latitude": 59.908127,
"longitude": 10.801460,
"name": "Etterstadsletta flyplass"
}
}

View file

@ -34,40 +34,25 @@ mkdir -p "$BUILD_DIR"
# Change to project directory
cd "$PROJECT_DIR"
# Build the applications
echo_info "Building SkyView applications..."
# Build the application
echo_info "Building SkyView application..."
export CGO_ENABLED=0
export GOOS=linux
export GOARCH=amd64
VERSION=$(git describe --tags --always --dirty)
LDFLAGS="-w -s -X main.version=$VERSION"
# Build main skyview binary
echo_info "Building skyview..."
if ! go build -ldflags="$LDFLAGS" \
go build -ldflags="-w -s -X main.version=$(git describe --tags --always --dirty)" \
-o "$DEB_DIR/usr/bin/skyview" \
./cmd/skyview; then
echo_error "Failed to build skyview"
./cmd/skyview
if [ $? -ne 0 ]; then
echo_error "Failed to build application"
exit 1
fi
# Build beast-dump utility
echo_info "Building beast-dump..."
if ! go build -ldflags="$LDFLAGS" \
-o "$DEB_DIR/usr/bin/beast-dump" \
./cmd/beast-dump; then
echo_error "Failed to build beast-dump"
exit 1
fi
echo_info "Built binary: $(file "$DEB_DIR/usr/bin/skyview")"
echo_info "Built binaries:"
echo_info " skyview: $(file "$DEB_DIR/usr/bin/skyview")"
echo_info " beast-dump: $(file "$DEB_DIR/usr/bin/beast-dump")"
# Set executable permissions
# Set executable permission
chmod +x "$DEB_DIR/usr/bin/skyview"
chmod +x "$DEB_DIR/usr/bin/beast-dump"
# Get package info
VERSION=$(grep "Version:" "$DEB_DIR/DEBIAN/control" | cut -d' ' -f2)
@ -84,7 +69,9 @@ sed -i "s/Installed-Size:.*/Installed-Size: $INSTALLED_SIZE/" "$DEB_DIR/DEBIAN/c
echo "Installed-Size: $INSTALLED_SIZE" >> "$DEB_DIR/DEBIAN/control"
# Build the package
if dpkg-deb --root-owner-group --build "$DEB_DIR" "$BUILD_DIR/$DEB_FILE"; then
dpkg-deb --build "$DEB_DIR" "$BUILD_DIR/$DEB_FILE"
if [ $? -eq 0 ]; then
echo_info "Successfully created: $BUILD_DIR/$DEB_FILE"
# Show package info

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