Abstract
It is known that the echoes from offshore waters are affected by land echoes, the inversed ocean parameters such as sea surface height (SSH), significant wave height (SWH) and backscattering coefficient (σ0) have relatively large errors and are even unreliable. And thus a large amount of offshore data is unusable. Firstly, this paper studied and analysed offshore waveforms’ characteristics affected by land echoes. Secondly, the offshore echoes were simulated according to the electromagnetic scattering model and classified into five categories. Those characteristics of the contaminated echoes by land echoes were simulated to help retrieving oceanic parameters. Finally, a new adaptive weighted piecewise fitting algorithm (AWPFA) was presented to process offshore echoes of Jason-1/2 by an adaptive method of setting the adaptive weight coefficient according to the contamination degree of the echo waveforms. Compared with four kinds of offshore echo re-tracking algorithms, the new algorithm ignores the impacted components of echoes by land and mainly pays attention to the signal components of the ocean echoes. This new re-tracking algorithm can effectively improve the accuracy of ocean parameter inversion and reduce the unusable distance. It is an effective re-tracking method of processing offshore data for an altimeter.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
