A subwaveform threshold retracker for ERS-1 altimetry: A case study in the Antarctic Ocean
作者： Yuande Yang , Cheinway Hwang , Hung-Jui Hsu , E Dongchen , Haihong Wang
DOI: 10.1016/J.CAGEO.2011.08.017
关键词:
摘要: Based on a correlation analysis method, subwaveform threshold retracker is developed and coded in FORTRAN for satellite altimetry to determine the leading edge retracking gate, improve precision of sea surface heights (SSHs) gravity anomalies (GAs). Using ERS-1/ERM waveforms, outperforms full-waveform retrackers at tide gage Port Station. A direct comparison between retracked SSHs situ made Here improves SSH from 0.241 0.193m, yielding an improvement percentage (IMP) 20%. ERS-1/GM Beta-5 over Bellingshausen Amundsen Seas (BAS) Antarctic Ocean. The standard deviations raw are 0.157 0.070 1.836 0.220m ice-free ice-covered oceans, corresponding IMPs 54.4% 88%, respectively. Use GAs by up 46.6% when comparing altimeter-derived shipborne GAs.
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