Fix dashboard startup regressions and mode utilities

intercept_agent.py

@@ -3502,7 +3502,7 @@ class ModeManager:
             stations_url = 'https://celestrak.org/NORAD/elements/gp.php?GROUP=weather&FORMAT=tle'
             satellites = load.tle_file(stations_url)
 
-            ts = load.timescale()
+            ts = load.timescale(builtin=True)
             observer = Topos(latitude_degrees=lat, longitude_degrees=lon)
 
             logger.info(f"Satellite predictor: {len(satellites)} satellites loaded")

routes/controller.py

@@ -729,7 +729,8 @@ def agent_management_page():
 def network_monitor_page():
     """Render the network monitor page for multi-agent aggregated view."""
     from flask import render_template
-    return render_template('network_monitor.html')
+    from config import VERSION
+    return render_template('network_monitor.html', version=VERSION)
 
 
 # =============================================================================

routes/radiosonde.py

@@ -83,6 +83,62 @@ def find_auto_rx() -> str | None:
     return None
 
 
+def _iter_auto_rx_python_candidates(auto_rx_path: str):
+    """Yield plausible Python interpreters for radiosonde_auto_rx."""
+    auto_rx_abs = os.path.abspath(auto_rx_path)
+    auto_rx_dir = os.path.dirname(auto_rx_abs)
+    install_root = os.path.dirname(auto_rx_dir)
+
+    candidates = [
+        sys.executable,
+        os.path.join(install_root, 'venv', 'bin', 'python'),
+        os.path.join(install_root, '.venv', 'bin', 'python'),
+        os.path.join(auto_rx_dir, 'venv', 'bin', 'python'),
+        os.path.join(auto_rx_dir, '.venv', 'bin', 'python'),
+        shutil.which('python3'),
+    ]
+
+    seen: set[str] = set()
+    for candidate in candidates:
+        if not candidate:
+            continue
+        candidate_abs = os.path.abspath(candidate)
+        if candidate_abs in seen:
+            continue
+        seen.add(candidate_abs)
+        if os.path.isfile(candidate_abs) and os.access(candidate_abs, os.X_OK):
+            yield candidate_abs
+
+
+def _resolve_auto_rx_python(auto_rx_path: str) -> tuple[str | None, str, list[str]]:
+    """Pick a Python interpreter that can import autorx.scan successfully."""
+    auto_rx_dir = os.path.dirname(os.path.abspath(auto_rx_path))
+    checked: list[str] = []
+    last_error = 'No usable Python interpreter found'
+
+    for python_bin in _iter_auto_rx_python_candidates(auto_rx_path):
+        checked.append(python_bin)
+        try:
+            dep_check = subprocess.run(
+                [python_bin, '-c', 'import autorx.scan'],
+                cwd=auto_rx_dir,
+                capture_output=True,
+                timeout=10,
+            )
+        except Exception as exc:
+            last_error = str(exc)
+            continue
+
+        if dep_check.returncode == 0:
+            return python_bin, '', checked
+
+        stderr_output = dep_check.stderr.decode('utf-8', errors='ignore').strip()
+        stdout_output = dep_check.stdout.decode('utf-8', errors='ignore').strip()
+        last_error = stderr_output or stdout_output or f'Interpreter exited with code {dep_check.returncode}'
+
+    return None, last_error, checked
+
+
 def generate_station_cfg(
     freq_min: float = 400.0,
     freq_max: float = 406.0,
@@ -547,31 +603,29 @@ def start_radiosonde():
     # Build command - auto_rx -c expects the path to station.cfg
     cfg_abs = os.path.abspath(cfg_path)
     if auto_rx_path.endswith('.py'):
-        cmd = [sys.executable, auto_rx_path, '-c', cfg_abs]
+        selected_python, dep_error, checked_interpreters = _resolve_auto_rx_python(auto_rx_path)
+        if not selected_python:
+            logger.error(
+                "radiosonde_auto_rx dependency check failed across interpreters %s: %s",
+                checked_interpreters,
+                dep_error,
+            )
+            app_module.release_sdr_device(device_int, sdr_type_str)
+            checked_msg = ', '.join(checked_interpreters) if checked_interpreters else 'none'
+            return api_error(
+                'radiosonde_auto_rx dependencies not satisfied. '
+                'Install or repair its Python environment (missing packages such as semver). '
+                f'Checked interpreters: {checked_msg}. '
+                f'Last error: {dep_error[:500]}',
+                500,
+            )
+        cmd = [selected_python, auto_rx_path, '-c', cfg_abs]
     else:
         cmd = [auto_rx_path, '-c', cfg_abs]
 
     # Set cwd to the auto_rx directory so 'from autorx.scan import ...' works
     auto_rx_dir = os.path.dirname(os.path.abspath(auto_rx_path))
 
-    # Quick dependency check before launching the full process
-    if auto_rx_path.endswith('.py'):
-        dep_check = subprocess.run(
-            [sys.executable, '-c', 'import autorx.scan'],
-            cwd=auto_rx_dir,
-            capture_output=True,
-            timeout=10,
-        )
-        if dep_check.returncode != 0:
-            dep_error = dep_check.stderr.decode('utf-8', errors='ignore').strip()
-            logger.error(f"radiosonde_auto_rx dependency check failed:\n{dep_error}")
-            app_module.release_sdr_device(device_int, sdr_type_str)
-            return api_error(
-                'radiosonde_auto_rx dependencies not satisfied. '
-                f'Re-run setup.sh to install. Error: {dep_error[:500]}',
-                500,
-            )
-
     try:
         logger.info(f"Starting radiosonde_auto_rx: {' '.join(cmd)}")
         app_module.radiosonde_process = subprocess.Popen(

routes/satellite.py

@@ -34,7 +34,8 @@ def _get_timescale():
     global _cached_timescale
     if _cached_timescale is None:
         from skyfield.api import load
-        _cached_timescale = load.timescale()
+        # Use bundled timescale data so the first request does not block on network I/O.
+        _cached_timescale = load.timescale(builtin=True)
     return _cached_timescale
 
 # Maximum response size for external requests (1MB)

routes/sstv.py

@@ -478,7 +478,7 @@ def _get_timescale():
     with _timescale_lock:
         if _timescale is None:
             from skyfield.api import load
-            _timescale = load.timescale()
+            _timescale = load.timescale(builtin=True)
         return _timescale
 
 

static/js/core/cheat-sheets.js

@@ -19,6 +19,7 @@ const CheatSheets = (function () {
         sstv_general:{ title: 'HF SSTV',                 icon: '📷', hardware: 'RTL-SDR + HF upconverter',                description: 'Receives HF SSTV transmissions.',                                          whatToExpect: 'Amateur radio images on 14.230 MHz (USB mode).',                tips: ['14.230 MHz USB is primary HF SSTV frequency', 'Scottie 1 and Martin 1 most common', 'Best during daylight hours'] },
         gps:         { title: 'GPS Receiver',            icon: '🗺️', hardware: 'USB GPS receiver (NMEA)',                 description: 'Streams GPS position and feeds location to other modes.',                  whatToExpect: 'Lat/lon, altitude, speed, heading, satellite count.',          tips: ['BT Locate uses GPS for trail logging', 'Set observer location for satellite prediction', 'Verify a 3D fix before relying on altitude'] },
         spaceweather:{ title: 'Space Weather',           icon: '☀️', hardware: 'None (NOAA/SpaceWeatherLive data)',        description: 'Monitors solar activity and geomagnetic storm indices.',                   whatToExpect: 'Kp index, solar flux, X-ray flare alerts, CME tracking.',      tips: ['High Kp (≥5) = geomagnetic storm', 'X-class flares cause HF radio blackouts', 'Check before HF or satellite operations'] },
+        controller_monitor: { title: 'Controller Monitor', icon: '🖧', hardware: 'Optional remote agents',               description: 'Aggregated controller view across connected agents and local sources.',    whatToExpect: 'Combined device activity, logs, and agent health in one place.', tips: ['Use it to compare what each agent is seeing', 'Check agent status before remote starts', 'Open Manage to add or troubleshoot agents'] },
         tscm:        { title: 'TSCM Counter-Surveillance', icon: '🔍', hardware: 'WiFi + Bluetooth adapters',             description: 'Technical Surveillance Countermeasures — detects hidden devices.',        whatToExpect: 'RF baseline comparison, rogue device alerts, tracker detection.', tips: ['Take baseline in a known-clean environment', 'New strong signals = potential bug', 'Correlate WiFi + Bluetooth observations'] },
         spystations: { title: 'Spy Stations',            icon: '🕵️', hardware: 'RTL-SDR + HF antenna',                   description: 'Database of known number stations, military, and diplomatic HF signals.', whatToExpect: 'Scheduled broadcasts, frequency database, tune-to links.',    tips: ['Numbers stations often broadcast on the hour', 'Use Spectrum Waterfall to tune directly', 'STANAG and HF mil signals are common'] },
         websdr:      { title: 'WebSDR',                  icon: '🌐', hardware: 'None (uses remote SDR servers)',           description: 'Access remote WebSDR receivers worldwide for HF shortwave listening.', whatToExpect: 'Live audio from global HF receivers, waterfall display.',      tips: ['websdr.org lists available servers', 'Good for HF when local antenna is lacking', 'Use in-app player for seamless experience'] },

static/js/modes/space-weather.js

@@ -18,6 +18,11 @@ const SpaceWeather = (function () {
     // Current image selections
     let _solarImageKey = 'sdo_193';
     let _drapFreq = 'drap_global';
+    const SOLAR_IMAGE_FALLBACKS = {
+        sdo_193: 'https://sdo.gsfc.nasa.gov/assets/img/latest/latest_512_0193.jpg',
+        sdo_304: 'https://sdo.gsfc.nasa.gov/assets/img/latest/latest_512_0304.jpg',
+        sdo_magnetogram: 'https://sdo.gsfc.nasa.gov/assets/img/latest/latest_512_HMIBC.jpg',
+    };
 
     /** Stable cache-bust key that rotates every 5 minutes (matches backend max-age). */
     function _cacheBust() {
@@ -54,11 +59,12 @@ const SpaceWeather = (function () {
         const frame = document.getElementById('swSolarImageFrame');
         if (frame) {
             frame.innerHTML = '<div class="sw-loading">Loading</div>';
-            const img = new Image();
+            _loadImageWithFallback(
-            img.onload = function () { frame.innerHTML = ''; frame.appendChild(img); };
+                frame,
-            img.onerror = function () { frame.innerHTML = '<div class="sw-empty">Failed to load image</div>'; };
+                ['/space-weather/image/' + key + '?' + _cacheBust(), _directImageUrlForKey(key)],
-            img.src = '/space-weather/image/' + key + '?' + _cacheBust();
+                key,
-            img.alt = key;
+                '<div class="sw-empty">NASA SDO image is temporarily unavailable</div>'
+            );
         }
     }
 
@@ -68,11 +74,12 @@ const SpaceWeather = (function () {
         const frame = document.getElementById('swDrapImageFrame');
         if (frame) {
             frame.innerHTML = '<div class="sw-loading">Loading</div>';
-            const img = new Image();
+            _loadImageWithFallback(
-            img.onload = function () { frame.innerHTML = ''; frame.appendChild(img); };
+                frame,
-            img.onerror = function () { frame.innerHTML = '<div class="sw-empty">Failed to load image</div>'; };
+                ['/space-weather/image/' + key + '?' + _cacheBust()],
-            img.src = '/space-weather/image/' + key + '?' + _cacheBust();
+                key,
-            img.alt = key;
+                '<div class="sw-empty">Failed to load image</div>'
+            );
         }
     }
 
@@ -98,6 +105,38 @@ const SpaceWeather = (function () {
         if (_pollTimer) { clearInterval(_pollTimer); _pollTimer = null; }
     }
 
+    function _directImageUrlForKey(key) {
+        const base = SOLAR_IMAGE_FALLBACKS[key];
+        if (!base) return null;
+        return base + '?' + _cacheBust();
+    }
+
+    function _loadImageWithFallback(frame, urls, alt, failureHtml) {
+        const candidates = (urls || []).filter(Boolean);
+        if (!frame || candidates.length === 0) {
+            if (frame) frame.innerHTML = failureHtml;
+            return;
+        }
+
+        let index = 0;
+        const img = new Image();
+        img.alt = alt;
+        img.referrerPolicy = 'no-referrer';
+        img.onload = function () {
+            frame.innerHTML = '';
+            frame.appendChild(img);
+        };
+        img.onerror = function () {
+            index += 1;
+            if (index < candidates.length) {
+                img.src = candidates[index];
+                return;
+            }
+            frame.innerHTML = failureHtml;
+        };
+        img.src = candidates[index];
+    }
+
     function _fetchData() {
         fetch('/space-weather/data')
             .then(function (r) { return r.json(); })

templates/adsb_dashboard.html

@@ -25,7 +25,7 @@
     <script defer src="{{ url_for('static', filename='vendor/leaflet/leaflet.js') }}"></script>
     <script defer src="{{ url_for('static', filename='js/core/observer-location.js') }}"></script>
 </head>
-<body>
+<body data-mode="adsb">
     <div class="radar-bg"></div>
     <div class="scanline"></div>
 
@@ -422,6 +422,7 @@
         let eventSource = null;
         let agentPollTimer = null;  // Polling fallback for agent mode
         let isTracking = false;
+        let isTrackingStarting = false;
         let currentFilter = 'all';
         // ICAO -> { emergency: bool, watchlist: bool, military: bool }
         let alertedAircraft = {};
@@ -2367,6 +2368,10 @@ sudo make install</code>
             const btn = document.getElementById('startBtn');
             const useAgent = typeof adsbCurrentAgent !== 'undefined' && adsbCurrentAgent !== 'local';
 
+            if (isTrackingStarting) {
+                return;
+            }
+
             if (!isTracking) {
                 // Check for remote dump1090 config (only for local mode)
                 const remoteConfig = !useAgent ? getRemoteDump1090Config() : null;
@@ -2444,6 +2449,10 @@ sudo make install</code>
                     requestBody.remote_sbs_host = remoteConfig.host;
                     requestBody.remote_sbs_port = remoteConfig.port;
                 }
+                isTrackingStarting = true;
+                btn.disabled = true;
+                btn.textContent = 'STARTING...';
+                updateTrackingStatusDisplay();
                 try {
                     // Route through agent proxy if using remote agent
                     const url = useAgent
@@ -2470,10 +2479,12 @@ sudo make install</code>
                         drawRangeRings();
                         startSessionTimer();
                         isTracking = true;
+                        isTrackingStarting = false;
                         adsbActiveDevice = adsbDevice;  // Track which device is being used
                         adsbTrackingSource = useAgent ? adsbCurrentAgent : 'local';  // Track which source started tracking
                         btn.textContent = 'STOP';
                         btn.classList.add('active');
+                        btn.disabled = false;
                         document.getElementById('trackingDot').classList.remove('inactive');
                         updateTrackingStatusDisplay();
                         // Disable ADS-B device selector while tracking
@@ -2493,6 +2504,14 @@ sudo make install</code>
                     }
                 } catch (err) {
                     alert('Error: ' + err.message);
+                } finally {
+                    if (!isTracking) {
+                        isTrackingStarting = false;
+                        btn.disabled = false;
+                        btn.textContent = 'START';
+                        btn.classList.remove('active');
+                        updateTrackingStatusDisplay();
+                    }
                 }
             } else {
                 try {
@@ -5697,10 +5716,14 @@ sudo make install</code>
     {% include 'partials/help-modal.html' %}
 
     <script src="{{ url_for('static', filename='js/core/voice-alerts.js') }}?v={{ version }}&r=adsbvoice1"></script>
+    <script src="{{ url_for('static', filename='js/core/keyboard-shortcuts.js') }}"></script>
+    <script src="{{ url_for('static', filename='js/core/cheat-sheets.js') }}"></script>
+    {% include 'partials/nav-utility-modals.html' %}
     <script src="{{ url_for('static', filename='js/core/settings-manager.js') }}?v={{ version }}&r=maptheme17"></script>
     <script>
         window.addEventListener('DOMContentLoaded', () => {
             if (typeof VoiceAlerts !== 'undefined') VoiceAlerts.init();
+            if (typeof KeyboardShortcuts !== 'undefined') KeyboardShortcuts.init();
         });
     </script>
 
@@ -5738,7 +5761,10 @@ sudo make install</code>
             const statusEl = document.getElementById('trackingStatus');
             if (!statusEl) return;
 
-            if (!isTracking) {
+            if (isTrackingStarting && !isTracking) {
+                statusEl.textContent = 'INITIALIZING';
+                statusEl.title = 'Starting ADS-B receiver';
+            } else if (!isTracking) {
                 statusEl.textContent = 'STANDBY';
                 statusEl.title = 'Select source and click START';
             } else {

templates/ais_dashboard.html

@@ -24,7 +24,7 @@
     <script defer src="{{ url_for('static', filename='vendor/leaflet/leaflet.js') }}"></script>
     <script defer src="{{ url_for('static', filename='js/core/observer-location.js') }}"></script>
 </head>
-<body>
+<body data-mode="ais">
     <!-- Radar background effects -->
     <div class="radar-bg"></div>
     <div class="scanline"></div>
@@ -1632,7 +1632,20 @@
     <!-- Help Modal -->
     {% include 'partials/help-modal.html' %}
 
+    <script src="{{ url_for('static', filename='js/core/voice-alerts.js') }}?v={{ version }}&r=voicefix2"></script>
+    <script src="{{ url_for('static', filename='js/core/keyboard-shortcuts.js') }}"></script>
+    <script src="{{ url_for('static', filename='js/core/cheat-sheets.js') }}"></script>
+    {% include 'partials/nav-utility-modals.html' %}
     <script src="{{ url_for('static', filename='js/core/settings-manager.js') }}?v={{ version }}&r=maptheme17"></script>
+    <script>
+        window.addEventListener('DOMContentLoaded', () => {
+            if (typeof VoiceAlerts !== 'undefined') {
+                VoiceAlerts.init({ startStreams: false });
+                VoiceAlerts.scheduleStreamStart(20000);
+            }
+            if (typeof KeyboardShortcuts !== 'undefined') KeyboardShortcuts.init();
+        });
+    </script>
 
     <!-- Agent Manager -->
     <script src="{{ url_for('static', filename='js/core/agents.js') }}"></script>

templates/network_monitor.html

@@ -518,7 +518,7 @@
         }
     </style>
 </head>
-<body>
+<body data-mode="controller_monitor">
     <header class="header">
         <div class="logo">
             NETWORK MONITOR
@@ -1117,7 +1117,20 @@
     <!-- Help Modal -->
     {% include 'partials/help-modal.html' %}
 
+    <script src="{{ url_for('static', filename='js/core/voice-alerts.js') }}?v={{ version }}&r=voicefix2"></script>
+    <script src="{{ url_for('static', filename='js/core/keyboard-shortcuts.js') }}"></script>
+    <script src="{{ url_for('static', filename='js/core/cheat-sheets.js') }}"></script>
+    {% include 'partials/nav-utility-modals.html' %}
     <script src="{{ url_for('static', filename='js/core/settings-manager.js') }}?v={{ version }}&r=maptheme17"></script>
     <script src="{{ url_for('static', filename='js/core/global-nav.js') }}"></script>
+    <script>
+        window.addEventListener('DOMContentLoaded', () => {
+            if (typeof VoiceAlerts !== 'undefined') {
+                VoiceAlerts.init({ startStreams: false });
+                VoiceAlerts.scheduleStreamStart(20000);
+            }
+            if (typeof KeyboardShortcuts !== 'undefined') KeyboardShortcuts.init();
+        });
+    </script>
 </body>
 </html>

templates/partials/nav-utility-modals.html

@@ -0,0 +1,26 @@
+<!-- Cheat Sheet Modal -->
+<div id="cheatSheetModal" style="display:none; position:fixed; inset:0; background:rgba(0,0,0,0.7); z-index:10000; align-items:center; justify-content:center; padding:20px;" onclick="if(event.target===this)CheatSheets.hide()">
+    <div style="background:var(--bg-card, #1a1f2e); border:1px solid rgba(255,255,255,0.15); border-radius:12px; max-width:480px; width:100%; max-height:80vh; overflow-y:auto; padding:20px; position:relative;">
+        <button onclick="CheatSheets.hide()" style="position:absolute; top:12px; right:12px; background:none; border:none; color:var(--text-dim); cursor:pointer; font-size:18px; line-height:1;">✕</button>
+        <div id="cheatSheetContent"></div>
+    </div>
+</div>
+
+<!-- Keyboard Shortcuts Modal -->
+<div id="kbShortcutsModal" style="display:none; position:fixed; inset:0; background:rgba(0,0,0,0.7); z-index:10000; align-items:center; justify-content:center; padding:20px;" onclick="if(event.target===this)KeyboardShortcuts.hideHelp()">
+    <div style="background:var(--bg-card, #1a1f2e); border:1px solid rgba(255,255,255,0.15); border-radius:12px; max-width:520px; width:100%; max-height:80vh; overflow-y:auto; padding:20px; position:relative;">
+        <button onclick="KeyboardShortcuts.hideHelp()" style="position:absolute; top:12px; right:12px; background:none; border:none; color:var(--text-dim); cursor:pointer; font-size:18px; line-height:1;">✕</button>
+        <h2 style="margin:0 0 16px; font-size:16px; color:var(--accent-cyan, #4aa3ff); font-family:var(--font-mono);">Keyboard Shortcuts</h2>
+        <table style="width:100%; border-collapse:collapse; font-family:var(--font-mono); font-size:12px;">
+            <tbody>
+                <tr style="border-bottom:1px solid rgba(255,255,255,0.06);"><td style="padding:6px 8px; color:var(--accent-cyan);">Alt+W</td><td style="padding:6px 8px; color:var(--text-secondary);">Switch to Waterfall</td></tr>
+                <tr style="border-bottom:1px solid rgba(255,255,255,0.06);"><td style="padding:6px 8px; color:var(--accent-cyan);">Alt+M</td><td style="padding:6px 8px; color:var(--text-secondary);">Toggle voice mute</td></tr>
+                <tr style="border-bottom:1px solid rgba(255,255,255,0.06);"><td style="padding:6px 8px; color:var(--accent-cyan);">Alt+S</td><td style="padding:6px 8px; color:var(--text-secondary);">Toggle sidebar</td></tr>
+                <tr style="border-bottom:1px solid rgba(255,255,255,0.06);"><td style="padding:6px 8px; color:var(--accent-cyan);">Alt+K / ?</td><td style="padding:6px 8px; color:var(--text-secondary);">Show keyboard shortcuts</td></tr>
+                <tr style="border-bottom:1px solid rgba(255,255,255,0.06);"><td style="padding:6px 8px; color:var(--accent-cyan);">Alt+C</td><td style="padding:6px 8px; color:var(--text-secondary);">Show cheat sheet for current mode</td></tr>
+                <tr style="border-bottom:1px solid rgba(255,255,255,0.06);"><td style="padding:6px 8px; color:var(--accent-cyan);">Alt+1..9</td><td style="padding:6px 8px; color:var(--text-secondary);">Switch to Nth mode in current group</td></tr>
+                <tr><td style="padding:6px 8px; color:var(--accent-cyan);">Escape</td><td style="padding:6px 8px; color:var(--text-secondary);">Close modal</td></tr>
+            </tbody>
+        </table>
+    </div>
+</div>

templates/satellite_dashboard.html

@@ -21,7 +21,7 @@
     </script>
     <script src="{{ url_for('static', filename='js/core/observer-location.js') }}"></script>
 </head>
-<body>
+<body data-mode="satellite">
     <div class="grid-bg"></div>
     <div class="scanline"></div>
 
@@ -1830,9 +1830,22 @@
     <!-- Help Modal -->
     {% include 'partials/help-modal.html' %}
 
+    <script src="{{ url_for('static', filename='js/core/voice-alerts.js') }}?v={{ version }}&r=voicefix2"></script>
+    <script src="{{ url_for('static', filename='js/core/keyboard-shortcuts.js') }}"></script>
+    <script src="{{ url_for('static', filename='js/core/cheat-sheets.js') }}"></script>
+    {% include 'partials/nav-utility-modals.html' %}
     <script src="{{ url_for('static', filename='js/core/settings-manager.js') }}?v={{ version }}&r=maptheme17"></script>
     <script src="{{ url_for('static', filename='js/core/global-nav.js') }}"></script>
     <script src="{{ url_for('static', filename='js/modes/ground_station_waterfall.js') }}"></script>
+    <script>
+        window.addEventListener('DOMContentLoaded', () => {
+            if (typeof VoiceAlerts !== 'undefined') {
+                VoiceAlerts.init({ startStreams: false });
+                VoiceAlerts.scheduleStreamStart(20000);
+            }
+            if (typeof KeyboardShortcuts !== 'undefined') KeyboardShortcuts.init();
+        });
+    </script>
 
     <script>
     // -------------------------------------------------------------------------

utils/doppler.py

@@ -90,7 +90,7 @@ class DopplerTracker:
             return False
 
         try:
-            ts = load.timescale()
+            ts = load.timescale(builtin=True)
             satellite = EarthSatellite(tle[1], tle[2], tle[0], ts)
             observer = wgs84.latlon(latitude, longitude)
         except Exception as e:

utils/ground_station/scheduler.py

@@ -286,10 +286,10 @@ class GroundStationScheduler:
         from utils.satellite_predict import predict_passes as _predict_passes
 
         try:
-            ts = load.timescale()
+            ts = load.timescale(builtin=True)
         except Exception:
             from skyfield.api import load as _load
-            ts = _load.timescale()
+            ts = _load.timescale(builtin=True)
 
         observer = wgs84.latlon(self._lat, self._lon)
         now = datetime.now(timezone.utc)

utils/weather_sat_predict.py

@@ -70,7 +70,7 @@ def predict_passes(
     # patch sys.modules to simulate skyfield being unavailable).
     import skyfield  # noqa: F401
 
-    ts = load.timescale()
+    ts = load.timescale(builtin=True)
     observer = wgs84.latlon(lat, lon)
     t0 = ts.now()
     t1 = ts.utc(t0.utc_datetime() + datetime.timedelta(hours=hours))