What the saved comparisons establish
The four unresolved stretches contain two different numerical problems.
| Stretch | What differs between saved starting solutions | Next useful check |
|---|---|---|
0e73879f98c3b701fd7c42df |
Zero-field-globe time offsets differ by about 17.3 ms without removal and 70.0 ms with profiled removal; initial-position and acceleration corrections change with them. | Reoptimize nuisance parameters at the distinct time offsets and compare the resulting solutions. |
50f24131843071ae9312c082 |
Zero-field-globe offsets differ by about 45.0 ms. The relative cost difference already exceeds the repeat limit. | Start the matched fixed-time profile here; a repair to the reporting error cannot supply repeat agreement. |
370cec66878c4c1cf84b4ceb |
Specified-field-globe endpoints differ by only about 14 ns; gravity and calibration changes dominate their parameter separation. | Diagnose the joint correction and its failed fresh check, rather than treating this as a widely separated timing solution. |
b4e44ddc0f130ecd45674c78 |
Zero-field-globe offsets differ by about 57.1 ms; specified-field-globe offsets differ by less than 0.2 microseconds. | Separate the timing-profile problem from the large gravity/calibration correction and unsupported probes. |
Across the sixteen endpoints, only about 1–5% of the timing-column norm remains after projecting out the other active Jacobian columns. This describes a strong local timing/calibration trade-off. The projection ignores bounds and does not establish global non-identifiability or justify dropping a parameter.
The older local Jacobians do not accurately predict the residual differences between several widely separated endpoints. Those differences need nonlinear profiles. A tangent calculation cannot replace the proposed reoptimized comparison.
These are diagnostics of preserved pre-boundary-check solutions. They neither relabel the four stretches nor rerun earlier fits. The completed batch compared eight pairs, used sixteen local projection solves and made zero native predictions.
Full saved comparison · Planned matched profile · Current status.