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AGU: Geophysical Research Letters

 

Index Terms

  • Geodesy and Gravity: Space geodetic surveys
  • Geodesy and Gravity: Instruments and techniques
  • Geodesy and Gravity: Integrations of techniques
  • Radio Science: Interferometry
  • Radio Science: Radio wave propagation

Abstract

Interferometric synthetic aperture radar atmospheric correction: Medium Resolution Imaging Spectrometer and Advanced Synthetic Aperture Radar integration

Zhenhong Li

Department of Geomatic Engineering, University College London, London, UK

Eric J. Fielding

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Paul Cross

Department of Geomatic Engineering, University College London, London, UK

Jan-Peter Muller

Department of Geomatic Engineering, University College London, London, UK

Atmospheric water vapor effects represent one of the major limitations of repeat-pass InSAR, and limit the accuracy of deformation rates derived from InSAR. The use of contemporaneous MERIS data to correct ENVISAT ASAR measurements shows a significant reduction in water vapor effects. After correction, the RMS differences between GPS and InSAR range changes in the satellite line of sight direction decreased to 0.55 cm with a reduction of up to 0.35 cm. It is also shown that it is possible to implement an extra ‘conservative’ cloud mask and obtain better water vapor corrections than that from using the official ESA cloud mask product.

Received 22 November 2005; accepted 14 February 2006; published 25 March 2006.

Citation: Li, Z., E. J. Fielding, P. Cross, and J.-P. Muller (2006), Interferometric synthetic aperture radar atmospheric correction: Medium Resolution Imaging Spectrometer and Advanced Synthetic Aperture Radar integration, Geophys. Res. Lett., 33, L06816, doi:10.1029/2005GL025299.

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