Abstract's details
Assessment of Sentinel-3A/B ocean data sets: Recent results of DGFI-TUM’s multi-mission cross-calibration
CoAuthors
Event: 2019 Ocean Surface Topography Science Team Meeting
Session: Regional and Global CAL/VAL for Assembling a Climate Data Record
Presentation type: Type Poster
Contribution: not provided
Abstract:
The innovative satellite altimeters on board of the Copernicus missions Sentinel-3A and Sentinel-3B are providing data since 2016 and 2018. In order to assess the performance of the derived sea surface heights and to check their consistency with other altimetry missions such as Jason-3, a multi-mission cross-calibration is useful. Such a calibration is able to provide information on the quality of all missions included in the analysis and to reveal instrument drifts or differences in the center-of-origin realization of the satellites’ orbits.
Moreover, a multi-mission cross-calibration forms the basis to derive a long-term and consistent satellite altimetry data set and to determine, monitor, and investigate the water stage of the open oceans as well as of inland water bodies. In order to integrate contemporaneous and former altimetry missions to a consistent long-term multi-mission data set, their observations must continuously be updated, harmonized, and calibrated to eliminate systematic differences between the missions. DGFI-TUM performs a global cross-calibration of all missions on a regular basis.
This contribution will use the DGFI-TUM extended multi-mission crossover analysis approach in order to assess the performance of Sentinel-3 altimetry data over open ocean. The analysis yields time series of radial errors of Sentinel-3A and Sentinel-3B, which are used to derive inter-mission biases, to identify potential altimeter drifts, as well as to extract information on the quality of precise orbit determination (POD) and geophysical corrections (e.g., wet tropospheric errors).
Moreover, a multi-mission cross-calibration forms the basis to derive a long-term and consistent satellite altimetry data set and to determine, monitor, and investigate the water stage of the open oceans as well as of inland water bodies. In order to integrate contemporaneous and former altimetry missions to a consistent long-term multi-mission data set, their observations must continuously be updated, harmonized, and calibrated to eliminate systematic differences between the missions. DGFI-TUM performs a global cross-calibration of all missions on a regular basis.
This contribution will use the DGFI-TUM extended multi-mission crossover analysis approach in order to assess the performance of Sentinel-3 altimetry data over open ocean. The analysis yields time series of radial errors of Sentinel-3A and Sentinel-3B, which are used to derive inter-mission biases, to identify potential altimeter drifts, as well as to extract information on the quality of precise orbit determination (POD) and geophysical corrections (e.g., wet tropospheric errors).