WU Yunsun, LI Zhenhong, LIU Jingnan, XU Caijun. Atmospheric Correction Models for InSAR Measurements[J]. Geomatics and Information Science of Wuhan University, 2006, 31(10): 862-867.
Citation: WU Yunsun, LI Zhenhong, LIU Jingnan, XU Caijun. Atmospheric Correction Models for InSAR Measurements[J]. Geomatics and Information Science of Wuhan University, 2006, 31(10): 862-867.

Atmospheric Correction Models for InSAR Measurements

Funds: 国家自然科学基金资助项目(40576044);高等学校博士学科点专项科研基金资助项目(20030486038)
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  • Received Date: July 27, 2006
  • Revised Date: July 27, 2006
  • Published Date: October 04, 2006
  • A brief review of InSAR atmospheric correction approaches,which have been developed to reduce atmospheric effects(particularly water vapour effects) from SAR interferograms in the last decade,is given.Emphasis is given to GPS topography-dependent turbulence model(GTTM) developed at University College London.Examples over the Los Angeles region reveals that,without InSAR atmospheric correction,the RMS differences between GPS-derived and InSAR-derived range changes in the line of sight(LOS) direction were 1.0 cm.After applying the GTTM,the RMS differences decreased to 0.5 cm,suggesting that the GTTM successfully reduced atmospheric water vapour effects on interferograms.A comparison between the GTTM and the GPS/MODIS integrated water vapour correction model shows that the GTTM and GPS/MODIS integrated models are complementary when correcting InSAR measurements.
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