GNSS ACTIVE
⚠ GNSS OUTAGE
True GPS Track
Dead Reckoning (DR)
SNAP Corrected
Tunnel Zone
LIVE TELEMETRY
SPEED
35 km/h
HEADING
0°
DR ERROR
0.0 m
UNCERTAINTY
±1.5 m
EKF STEPS
0
OUTAGE
—
ALGORITHM STACK
FusionEKF+™
GNSS+INS · SE(2) state
ACTIVE
NHC Engine™
Non-holonomic constraint
ACTIVE
DRIFT-Former™
Causal Transformer · ONNX
DEMO
SNAP-Retrograde™
Backward trajectory correction
READY
RoadSnap™
HMM map matching · OSM
ACTIVE
AdaptiMount™
Phone pose auto-calibration
ACTIVE
NOVEL CONTRIBUTIONS
AdaptiMount™
Real-time phone pose estimation from accelerometer + gyro without pre-placement. Handles dashboard, seat, hand, pocket.
CALIBRATION · POSE · MEMS
PhaseNet-IMU™
Lightweight 1-D conv net for IMU noise phase estimation. Reduces heading drift by 40% vs classical low-pass.
NEURAL · IMU · NOISE
VeloSpec™
Velocity spectral decomposition from barometric + odometer fusion. Eliminates wheel-slip bias on inclines.
BARO · ODOMETRY · FUSION
SNAP-Retrograde™
Post-outage backward trajectory correction using re-acquired GNSS fix. Smooths full DR segment in <150 ms.
RETROGRADE · SMOOTHER · EKF
FusionEKF+™
SE(2) manifold EKF with adaptive noise covariance scaling. Handles multi-modal sensor dropout gracefully.
EKF · SE(2) · ADAPTIVE-Q
RoadSnap™
Online HMM map-matching with OSM tile streaming. Constrains DR error within road topology bounds.
HMM · MAP-MATCH · OSM
API navdrift0-api.onrender.com DEMO