Abstract
The inter-mission cross-calibration is a basic prerequisite for long-term sea level change studies on all spatial scales. Especially, for climate studies the consistent combination of successive missions is essential. This study uses a global multi-mission crossover analysis in order to investigate the performance of the Copernicus Sentinel-3A altimetry mission and its consistency to consecutive missions such as Jason-3. The first 1.5 years of data show an inter-mission bias of 3.6 cm with respect to Jason-3 with a linear trend of 4.0 mm/year. When using Pseudo Low Resolution Mode (PLRM) instead of Delay-Doppler data the bias increases whereas the trend decreases. Given the short time period under investigation these numbers should not be overrated, however, a careful future monitoring is necessary.
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Notes
- 1.
Dynamic Atmospheric Corrections are produced by CLS Space Oceanography Division using the Mog2D model from Legos and distributed by Aviso, with support from CNES (http://www.aviso.altimetry.fr/).
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Acknowledgements
We kindly thank the institutions in charge of mission operation and maintenance (ESA, EUMETSAT, NASA, CNES) as well as the data providers (EUMETSAT, AVISO). Special thank goes to EUMETSAT for supporting the participation at the International Review Workshop On Satellite Altimetry Cal/Val Activities and Applications, Chania, Greece, April 2018.
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Dettmering, D., Schwatke, C. (2019). Multi-Mission Cross-Calibration of Satellite Altimeters. In: Mertikas, S., Pail, R. (eds) Fiducial Reference Measurements for Altimetry. International Association of Geodesy Symposia, vol 150. Springer, Cham. https://doi.org/10.1007/1345_2019_58
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