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Application of retracked satellite altimetry for inland hydrologic studies

  • Manman Zhang
  • , Hyongki Lee
  • , C. K. Shum
  • , Doug Alsdorf
  • , Frank Schwartz
  • , Kuo Hsin Tseng
  • , Yuchan Yi
  • , Chung Yen Kuo
  • , Hong Zeng Tseng
  • , Alexander Braun
  • , Stéphane Calmant
  • , Filizola Naziano
  • , Frederique Seyler

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

We explored the application of satellite radar altimetry for the monitoring of small inland bodies of water and hydrologic studies using a water-detection algorithm, optimally retracked TOPEX/POSEIDON data at 10-Hz sampling, and investigated the use of radar backscatter to improve land cover classification. The procedure was demonstrated over Manitoba and south-western (SW) Ontario, and the Amazon River Basin study regions. Compared with an L-band synthetic aperture radar data generated water-land cover mask, the water-detection algorithm detected more water points over the Amazon basin. High correlation of 0.98 between the retracked 10-Hz altimetry and the gauge measurements in Manitoba confirmed that the retracked TOPEX data are more accurate than the non-retracked data, and with higher along-track spatial resolution by virtue of its higher sampling at 10 Hz.

Original languageEnglish
Pages (from-to)3913-3929
Number of pages17
JournalInternational Journal of Remote Sensing
Volume31
Issue number14
DOIs
StatePublished - Apr 2010

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