Gravity field from cryosat-2 sar altimetry: the merits of the empirical primary peak retrackers

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SAR lead and ocean data from Cryosat-2 is processed using waveform retracking for estimation of gravity fields in the Arctic Ocean. The retrackers proposed in this work are based on the combination of the OCOG (Offset Centre of Gravity) and Threshold methods with Primary Peak extraction. These proposed retrackers are used to construct sea surface height anomalies for the Arctic. Next, gravity fields are computed from the sea surface height anomalies. The gravity fields are computed for various retrackers: traditional Threshold, traditional OCOG, Primary Peak OCOG, Primary Peak Threshold and the ESA retracker. It was concluded through this work that Primary Peak retrackers result in more accurate gravity fields as compared to other retrackers for SAR lead data in the Arctic.
Original languageEnglish
Title of host publicationProc. ‘ESA Living Planet Symposium 2013’
Number of pages5
Place of PublicationEdinburgh, UK
PublisherEuropean Space Agency
Publication date2013
Publication statusPublished - 2013
EventESA Living Planet Symposium - Edinburgh, United Kingdom
Duration: 9 Sep 201313 Sep 2013


ConferenceESA Living Planet Symposium
Country/TerritoryUnited Kingdom


  • SAR
  • Altimetry
  • Cryosat-2
  • Primary peak retracking


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