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Radiometric Path Delay Calibration of ER-2 with Application to Altimetric Range

Lookup NU author(s): Professor Philip Moore, Professor Stuart Edwards, Professor Matt King


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The accuracy and stability of the atmospheric wet path delay as measured by the microwave radimeter on board ERS-2 is crucial to altmetric measures of sea-level change. In this study a GPS receiver on an oil platform in the North Sea is first used to quantify the ERS-2 radiomatric wet path delay for the period 1999-2003. The observed discrepences between the GPS results and the radiometer motivate an extended study utilising a network of 13 IGS stations operational for 1995 through to the present day. The GPS wet path delays are converted to an equivalent brightness temperature on the 23.8GHz channel and used in a subsequent analysis to determine a correction formula. The new formulism is validated by utilising coldest and mean temperatures for each ERS-2 cycle 1-85.

Publication metadata

Author(s): Moore P, Edwards SJ, King MA

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: Envisat & ERS Symposium

Year of Conference: 2005

Pages: 9

Publisher: European Space Agency