Local Level Lab

Airborne measurements. Open methods.

Noisy calibration and later-position prediction

24/24 raw forecasts meet the physical error limits; 20/24 pass the numerical stopping checks.

Later horizontal RMS is 1.84–2.08 m; height RMS is 0.17–0.25 m. All 24/24 earlier-error-conditioned forecasts also meet the physical screen.

The study uses generated two-minute turning and climbing records with known IMU and receiver errors. Calibration uses 79 earlier positions; 40 later positions are withheld until the forecasts are saved. Both recorded-increment and endpoint-shared rate-sample error formats are tested. Each candidate predicts its own generating truth: these are not Earth-model votes.

24/24 completed fits reach at least one calibration boundary. The unrestricted linear uncertainty calculation cannot certify those boundary cases. Accurate point forecasts therefore do not establish calibrated confidence.

The complete prediction/uncertainty gate is not qualified. All numerical failures and unsupported calibration cases remain recorded. The original twenty-minute noisy failure and the 53-stretch findings are unchanged.

Complete results CSV · Frozen plan · Next analyses

Case Numerical pass Later horizontal RMS Later height RMS Calibration diagnostic
increment-sphere_rotating-0-0 Yes 2.014 m 0.168 m active bounds unsupported
increment-sphere_rotating-0-1 Yes 2.014 m 0.168 m active bounds unsupported
increment-sphere_rotating-1-0 No 1.836 m 0.171 m active bounds unsupported
increment-sphere_rotating-1-1 No 1.836 m 0.171 m active bounds unsupported
increment-sphere_still-0-0 Yes 2.025 m 0.167 m active bounds unsupported
increment-sphere_still-0-1 Yes 2.025 m 0.167 m active bounds unsupported
increment-sphere_still-1-0 Yes 1.853 m 0.168 m active bounds unsupported
increment-sphere_still-1-1 Yes 1.853 m 0.168 m active bounds unsupported
increment-flat_still-0-0 Yes 2.050 m 0.187 m active bounds unsupported
increment-flat_still-0-1 Yes 2.050 m 0.187 m active bounds unsupported
increment-flat_still-1-0 Yes 1.871 m 0.185 m active bounds unsupported
increment-flat_still-1-1 Yes 1.871 m 0.185 m active bounds unsupported
point-sphere_rotating-0-0 Yes 2.051 m 0.228 m active bounds unsupported
point-sphere_rotating-0-1 Yes 2.051 m 0.228 m active bounds unsupported
point-sphere_rotating-1-0 Yes 1.906 m 0.230 m active bounds unsupported
point-sphere_rotating-1-1 Yes 1.906 m 0.230 m active bounds unsupported
point-sphere_still-0-0 Yes 2.061 m 0.228 m active bounds unsupported
point-sphere_still-0-1 Yes 2.061 m 0.228 m active bounds unsupported
point-sphere_still-1-0 No 1.922 m 0.228 m active bounds unsupported
point-sphere_still-1-1 No 1.922 m 0.228 m active bounds unsupported
point-flat_still-0-0 Yes 2.077 m 0.252 m active bounds unsupported
point-flat_still-0-1 Yes 2.077 m 0.252 m active bounds unsupported
point-flat_still-1-0 Yes 1.922 m 0.253 m active bounds unsupported
point-flat_still-1-1 Yes 1.922 m 0.253 m active bounds unsupported

Wall time: 31.05 minutes. Attempted native calls: 1,429,708; prepaid allowance: 1,438,896.

The error-conditioned physical-position target omits future receiver-error contributions. No later receiver coordinates choose weights or corrections. Original aircraft and protected confirmation recordings are not inputs.

Software qualification · Reproducibility.