CoAuthors

Christian Schwatke (DGFI-TUM, Germany); Wolfgang Bosch (DGFI-TUM, Germany)

A global multi-mission crossover analysis is a powerful tool to check the consistency between different altimeter missions, to extract information on the noise level of different instruments, and to detect systematic errors in the data sets. The latter allows analyzing the temporal and geographically correlated characteristics of the errors which essentially influences the accuracy of estimation regional sea level trends and ocean circulation. For this reason, the inter-mission calibration is one of the basic methods of CAL/VAL activities and an inevitable prerequisite for all applications based on multi-mission altimetry.

This contribution will present recent results of DGFI’s global multi-mission crossover analysis (MMXO). The main emphasis will be on long-term instrument bias drifts of different missions as well as on influences of new orbit computation standards (GDR-E) to sea surface height estimation. Moreover, results of reprocessed data sets (ESA Reaper products) and new missions (Jason-3, Sentinel-3) will be shown in case the necessary data sets are available in time.