LR11xx Open Solver

Paste a NAV payload from a Semtech LR1110/LR1120 GNSS scan and get coordinates — solved right here, no vendor cloud.

NAV payload (hex, 0x040D result — destination byte optional)

Capture time (GPST s)

Time sigma (s)

Assist lat (±150 km ok)

Assist lon

Detected satellites — optional 0x0418 list, JSON: [{"id":16,"cnr":40,"doppler":699}, …]

Show response JSON

API

The same solver behind this page, free to try (30 solves/min):

curl -X POST https://gnss-solver.com/v1/solve/lr11xx   -H "content-type: application/json" -d '{
    "format": "nav3",
    "payload": "<0x040D result hex, destination byte optional>",
    "capture_time_gpst": 1472142795, "capture_time_sigma_s": 8,
    "assist_position": { "lat": 49.28, "lon": -123.12 },
    "detected_sats": [ { "id": 16, "cnr": 40, "doppler": 699 } ]
  }'

Response: { position: {lat, lon, alt}, horizontal_accuracy_m, satellites_used, accepted, confidence, quality: { residual_rms_m, geometry }, solve_ms }. A solve that converges but fails integrity checks returns accepted: false with the position and flags — treat those fixes with suspicion. Free tier: 10 solves/day per client; volume or pilot access: [email protected].

Daily fresh LR11xx almanac image, built from public data (the old LoRa Cloud response shape):

curl https://gnss-solver.com/v1/almanac/full

Payloads are solved in memory and not retained. Accuracy on our validation corpus: ~12 m median with 6+ satellites, benchmarked against AWS Device Location on identical payloads. NAV3 (mask 0x0B and mode 0) and NAV1 are supported; BeiDou and mask 0x3C are in progress. Questions or pilot inquiries: [email protected].