Local Level Lab

Airborne measurements. Open methods.

Completed two-case timing recovery

Shape preference: globe. All six primary fits pass, both fresh controls pass, and both required primary/repeat comparisons pass. Both processing assumptions also prefer the specified background field after the shape comparison.

The source studies used 82 and 56 native calls. This review performed only two saved-residual comparisons, with zero new native predictions, fits or original-file reads. Four other primary fits were already passing and their sealed artifacts were verified. The geometry-qualified recovery preserves the original observations, selected interval, clock, physical bounds, receiver weights and scientific stopping limits. Every earlier failure remains in the record.

Processing case Globe with field cost Zero-field globe cost Flat-disc cost Repeat cost difference Maximum axis track RMS
bias1_profiled_removal 3.863311 1674.916786 5641.801320 2.79215e-11 1.40003e-06 m
bias1_unsubtracted 4.504173 1674.911089 47167.615164 5.53749e-12 1.05414e-06 m

Repeat agreement must satisfy relative cost difference at most 10⁻⁶ and track RMS at most 0.01 m on each axis. These are numerical repeatability checks, not instrument-accuracy estimates or calibrated significance. The field’s cause and solar-versus-sidereal rate are not established. Simultaneous recorders and shared flights still require grouping.

Current status · All stretches · Representable diagnostic · Earlier two-case diagnostic.