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- Title
ACCURATE SENTINEL-2 INTER-BAND TIME DELAYS.
- Authors
Binet, R.; Bergsma, E.; Poulain, V.
- Abstract
Accurate knowledge on the time-delays between detector bands is paramount for the observation of dynamic features in Sentinel-2 imagery. Sentinel-2 inter-band time delays have been characterised analytically and empirically on Level-1B images with help of the rigorous geometric model. Two major contributors have been identified: optical distortion and satellite altitude inducing across- track and along-track delay variations up to ±2% with respect to ESA handbook fixed value. A harmonic attitude perturbation induces a 0.15% peak to peak temporal modulation on delays. An original method is proposed in order to estimate inter-band delays from L1C orthorectified and tiled products. The method relies on the orbital ephemeris embedded in L1C metadata and a lookup table. The performance assessment exhibits a maximum error of 1% and a rms error of 0.28%.
- Subjects
EUROPEAN Space Agency; OPTICAL distortion; GEOMETRIC modeling; ALTITUDES; METADATA
- Publication
ISPRS Annals of Photogrammetry, Remote Sensing & Spatial Information Sciences, 2022, Issue 1, p57
- ISSN
2194-9042
- Publication type
Article
- DOI
10.5194/isprs-annals-V-1-2022-57-2022