HALO Mars Hazard Aware Layered Operations on Mars
POSITION Suit Grid Position: Live (GX, GY) cell inside the 150×150 (`10 km × 10 km`) terrain matrix and straight-line distance from Base Habitat `(75, 75)`. GX 85, GY 65 • 0.95 km
ELEV / RAD Elevation & Dose Rate: MOLA/HiRISE altitude (m) and live radiation dose rate (µSv/hr) shielded by surrounding canyon horizon (SVF). -2180 m • 8.9 µSv/hr
SOLVER Physics Compute Time: Wall-clock time (ms) to solve unabridged 8-connected Dual-Pass Dijkstra across all 22,500 cells plus Marching Squares contours. 3.1 ms
ZERO-GPS Zero-GPS Horizon Lock: Correlation confidence (NCC %) and optical compass heading comparing the suit camera skyline against orbital Mars elevation data. Click readout to inspect. 99.9% • Yaw +0°
Safe Zone Caution Turn Back (Red) Return Route Safe Return Contours:
• Safe Zone (Green): T < 0.75 — ample outbound + return reserve.
• Caution (Amber): 0.75–1.00 — approaching turnaround ceiling.
• Turn Back (Red): T > 1.00 — reserve deficit to reach Base safely.
• Return Route (Blue): Energy-optimal path around cliffs & drift sand.
HiRISE: Rust/Ochre Relief • Red = >33° Impassable Cliffs

NASA Data

Terrestrial Spinoff: Marswalk Planner → Earth Backcountry SAR

Every HALO Mars navigation and route-planning module transfers directly to Earth Search & Rescue, alpine mountaineering, and wildland firefighting on ultra-low-power wrist wearables.

Subsystem Mars EVA Architecture Earth Backcountry SAR Spinoff
Terrain & Cutoff HiRISE/MOLA 150×150 DEM (>33° cliff cutoff) USGS 1m LiDAR / SRTM DEM (avalanche & scree cutoff)
Regolith & Thermal Odyssey THEMIS TIU slip η + SPICE solar shadow MODIS Snow/Ice albedo & wet-mud traction + windchill
Bioenergetics Santee-Gernhardt (3.71 m/s²) + NASA-STD-3001 triage Pandolf terrestrial load-carriage + hypothermia/altitude triage
GPS-Denied TRN 36-azimuth Mars-curvature DEM Skyline NCC (<1.8 ms) Canyon/under-canopy optical horizon silhouette lock (0 GPS)
Edge Power Budget CR2032 1Hz Always-On Watch Mode (42.3 mW, 15.6 HRS) Emergency wrist SOS beacon mode on single coin cell

7-Gate Runtime Mathematical Verification Suite

Custom Maps, Device Connect & Export

Upload custom terrain maps, connect a Bluetooth heart-rate watch or device compass, restore your last saved walk, or download mission files.

1 Custom Terrain Maps Use Your Own Terrain: Imports .asc, .csv, or .raw elevation files, fits them onto the 150×150 3D map, and automatically recalculates steep cliffs, sun shadows, and 360° horizons.

Upload your own terrain heightmap (.ASC, .CSV, or 16-bit .RAW) to rebuild 3D relief, cliff blocks, solar shadows, and horizons automatically.

Drop a terrain file (.ASC, .CSV, or .RAW) here or choose an option below:
Load From Computer: Pick an .asc, .csv, or 16-bit .raw elevation file from your device to replace the current 3D terrain and compute new safe-return borders.
Instant Demo Terrain: Loads a built-in Valles Marineris canyon heightmap so you can try custom terrain mode right away without preparing a file first.
Using built-in NASA Mars terrain map.

2 Connect Live Devices (Watch & Compass) Use Real Sensor Data: Connect a Bluetooth heart-rate watch/strap for live calorie burn, or link your device compass & GPS to turn the Zero-GPS visor heading live.

Stream live heart rate from a Bluetooth fitness sensor or link your device compass & GPS. Manual sliders stay unlocked whenever Bluetooth heart rate is disconnected.

Bluetooth Heart Rate Sensor: Connects to standard watches or chest straps (0x180D / 0x2A37) so live BPM updates your safe return perimeter automatically.
Device Compass & Outdoor Test: Links your phone or laptop orientation compass and GPS movement to test the Zero-GPS Horizon Lock outdoors.
Simulation Mode Active (Manual sliders unlocked)

3 Saved Mission History (Auto-Save) Automatic Second-by-Second Log: Saves up to 1 hour (3,600s) of position, heart rate, calories, O₂, and battery locally in your browser. Restoring is manual so startups stay clean.

Automatically saves your walk every second locally in browser storage. Restore your last session anytime or clear saved history without resetting your current sliders.

Resume Previous Walk: Restores your saved map, pin location, heart rate, carry load, and energy reserves from the most recent auto-saved snapshot.
Erase Recorded Log: Clears all auto-saved mission seconds from memory and browser storage while keeping your current screen unchanged.
0s recorded

4 Export Maps, Routes & Logs Download Standard Files: Exports real geographic coordinates (Mars sphere R = 3,389.5 km) ready for QGIS, NASA MMGIS, GPS watches, or Excel spreadsheets.

Download your safe-return boundary, best return walking corridor, or second-by-second health & battery log for external mapping apps and medical review.

Download Mapping Layer (.geojson): Saves the green/amber safe boundary lines, return path, and markers for GIS tools like QGIS or NASA MMGIS.
Download GPS Walking Track (.gpx): Saves the lowest-energy walking path back to Base with elevation points for handheld GPS devices and watches.
Download Spreadsheet Log (.csv): Saves second-by-second time, coordinates, heart rate, calories, O₂, battery, and safety margin for Excel or medical review.
Ready to download GeoJSON map, GPX route, or CSV log.