Assessment of Sentinel-3A/B ocean data sets: Recent results of DGFI-TUM’s multi-mission cross-calibration

Denise Dettmering (Deutsches Geodätisches Forschungsinstitut der Technischen Universität München (DGFI-TUM), Germany)

CoAuthors

Christian Schwatke (DGFI-TUM, Germany)

Event: 2019 Ocean Surface Topography Science Team Meeting

Session: Regional and Global CAL/VAL for Assembling a Climate Data Record

Presentation type: Type Poster

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).


 

Poster show times:

Room Start Date End Date
The Gallery Tue, Oct 22 2019,16:15 Tue, Oct 22 2019,18:00
The Gallery Thu, Oct 24 2019,14:00 Thu, Oct 24 2019,15:45
Denise Dettmering
Deutsches Geodätisches Forschungsinstitut der Technischen Universität München (DGFI-TUM)
Germany
denise.dettmering@tum.de