Validation of Jason and Envisat Altimeter Dual Frequency Rain Flags
نویسندگان
چکیده
منابع مشابه
Rain-flagging of the Envisat altimeter
As the goals for altimetric measurements become ever more precise, there is concern about the reliable detection and discarding of rain contaminated data. A dual-frequency rain detection technique developed for the Kuand C-band TOPEX altimeter, is adapted for the Kuand S-band RA-2 altimeter on Envisat. Of particular concern is the selection of a suitable threshold to minimise the quantity of go...
متن کاملDual-frequency Altimeter of Envisat above the Antarctica Ice Sheet
The dual-frequency altimeter of Topex allows since few years the observations of earth from 62°N to 62°S both in Ku and in C band. Previous works has been already performed above continental areas by [1, 2, 3, 4] and above the southern part of the Greenland ice sheet [5, 6]. These works show the great interest of a dual-frequency above both for the retrieval of some geophysical parameters and f...
متن کاملRain and Ice Flagging of Envisat Altimeter and Mwr Data
Altimetry range, wave height, and wind speed measurements are often corrupted by two effects over the ocean: rain and sea-ice. Radiometer measurements, which provide the altimetric wet troposphere correction, are similarly corrupted by the presence of rain or sea-ice in the instrument's footprint. To avoid contamination of sea surface height measurements, it is imperative that data influenced b...
متن کاملAnalysis of the Effect of Rain on the Envisat Altimeter: Definition of a Rain Flag
Past experiences with ERS and Topex/Poseidon altimeter data have shown that rain can significantly alter the quality of altimeter measurements (dynamic heights, significant wave heights, wind speed) [1][2][3][4]. Among all the different atmospheric phenomena which can affect the altimeter measurement, rain is one of the less well understood and at present no reliable correction can be made for ...
متن کاملEffects of Snow Properties on the Dual Frequency Radar Altimeter Signal of Envisat over the Antarctic Ice-sheet
A unique advantage of the ENVISAT altimeter system is the acquisition in S band as well as the classical Ku band. This S band frequency is designed to measure the ionospheric delay over the ocean surfaces. Over land and ice, however, the returned radar echo differences between the two frequencies are also function of the properties of the sensed medium. This is particularly the case over the An...
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ژورنال
عنوان ژورنال: Marine Geodesy
سال: 2004
ISSN: 0149-0419,1521-060X
DOI: 10.1080/01490410490465616