Data-Driven Calibration of SWOT’s Systematic Errors: First In-Flight Assessment Article Swipe
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· 2024
· Open Access
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· DOI: https://doi.org/10.3390/rs16193558
The SWOT satellite, carrying the KaRIN first wide-swath onboard altimeter, was launched in December 2022, and has now delivered more than a year of surface water elevation data over the ocean and inland lakes/rivers. These data are affected by systematic errors which constitute the dominant part of the error budget at scales larger than a few thousands of kilometers. Some strategies for their estimation and calibration were explored during the pre-launch studies with performance estimations. Now, based on the real data, we propose in this study to assess the systematic error budget with statistical methods relying on spectral and co-spectral analysis. From this assessment, suggesting very low error levels (below requirements), we propose the implementation of the calibration algorithms at Level-2 and Level-3 with a few minor adjustments justified by the error spectra. The calibrated products are then validated with usual CalVal metrics.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3390/rs16193558
- OA Status
- gold
- Cited By
- 6
- References
- 11
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4402814877