指南針不準或無方向感測器時,可大幅左右調整光帶,讓它對齊真實太陽、樹冠邊界或已知方向。
Field calibration guide
Use this checklist before judging shadow expiry. It turns the deterministic harness and field-report template into a repeatable real-device procedure.
- Use the rear camera outdoors or under the target canopy at expected tent-top height.
- Wait for GPS and compass status to settle before comparing the yellow band to the scene.
- Adjust azimuth when the full band is rotated left or right; adjust FOV only for global scale mismatch.
- Freeze, scrub the timeline, mark first exposure, then copy the guide snapshot with the field QA report.
Troubleshooting signals
- Compass weak/stale: move away from metal or magnets, rotate the phone, then use manual azimuth fallback.
- GPS demo/poor: move to open sky or record the limitation before relying on the result.
- Camera front: treat alignment as diagnostic only until rear-camera access works.
Field QA snapshot
Use this during iOS/Android field checks to record camera, GPS, compass, calibration, and sun-path state.
Structured field QA report
Fill this during real iOS/Android checks. The exported report combines tester notes, checklist status, visual alignment judgment, and the diagnostics snapshot.
QA draft auto-saves locally on this device.