The two tracks in the horizontal-only check
These are complete, previously selected stretches. The shorter artifact-complete stretch from each configuration was chosen before refitting, using duration rather than model preference. “IMU8” and “IMU21” are recorded Applanix configuration labels; they do not by themselves identify an individual physical unit.
| Configuration | Duration | Median ground speed | Minimum ground speed | Mean GPS course | Mean latitude |
|---|---|---|---|---|---|
| IMU8 | 585.04 s / 9.75 min | 849.11 km/h | 841.40 km/h | 203.69° | 63.07° S |
| IMU21 | 244.00 s / 4.07 min | 841.74 km/h | 834.33 km/h | 86.36° | 71.89° N |
Course is the GPS direction of travel, not measured aircraft heading. A heading or crab estimate from fused navigation is not an observation in these fits. The recordings come from distinct dates and geographic regions; this does not establish every installation's identity or make all stretches in the archive independent flights.
IMU8: southern, southwest-going stretch
- Recording:
ILVIS0_applanix_55124_Ames_510-20oct09_20Oct09.013. - UTC interval: 2009-10-20 13:25:32.783556–13:35:17.822442.
- Stretch ID:
b365bdf39150ee6afc303ac1. - Original SHA-256:
f39deb582f207574911dd3a16e6c389a8baac76ceace13ec2f13aefdc42341dd. - Horizontal-only outcome: all six repeat comparisons pass; globe preferred under both processing cases.
IMU21: northern, east-going stretch
- Recording:
ILVIS0_applanix_55295_20100409_610_LVIS_09Apr10.013. - UTC interval: 2010-04-09 12:56:16.115058–13:00:20.115282.
- Stretch ID:
7df21c836bec5751f83c0cce. - Original SHA-256:
b479a9a435e4e89047a18b53ba884364fe487a90b5bad42f8a6a2bb107a72bbd. - Horizontal-only outcome: all individual fits pass, but three repeat comparisons fail. Both initializations rank specified-field globe first; the matched result remains unresolved under the fixed repeatability policy.
Metadata comes from the preserved all-stretch analytics CSV and original eligibility catalog. No track or eligibility interval was recalculated for this page.