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contributor authorUbelmann, Clement
contributor authorFu, Lee-Lueng
contributor authorBrown, Shannon
contributor authorPeral, Eva
contributor authorEsteban-Fernandez, Daniel
date accessioned2017-06-09T17:25:29Z
date available2017-06-09T17:25:29Z
date copyright2014/06/01
date issued2014
identifier issn0739-0572
identifier otherams-84996.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4228393
description abstracteasurement of sea surface height (SSH) over a finite swath along satellite tracks has been planned for future space missions. The effect of water vapor in the troposphere on the delay of radar signal must be corrected for in the SSH measurement. The efficacy of a nadir-looking radiometer that has been the approach for conventional altimetry is examined in the study. The focus is placed on the cross-track variability of water vapor that is not measured by the nadir-looking radiometer. Simulations of the 2D field of water vapor were performed by spectral analysis of existing radiometer data. The residual error from the application of the correction made by a nadir-looking radiometer was computed over the global ocean and compared to the SSH signal estimated from satellite altimeter data. Global maps of the signal-to-error ratio (the square root of spectral variance at wavelengths shorter than 500 km) were created, showing values of 20?50 in the regions of high SSH variability of the boundary currents and the Antarctic Circumpolar Current, and 3?5 in the regions of low SSH variability in the tropics. Improvement in the correction by using a two-beam radiometer looking off nadir for measuring the slope of the cross-track variability was also explored, leading to a reduction of the error to below 1 cm at wavelengths of 10?500 km.
publisherAmerican Meteorological Society
titleThe Effect of Atmospheric Water Vapor Content on the Performance of Future Wide-Swath Ocean Altimetry Measurement
typeJournal Paper
journal volume31
journal issue6
journal titleJournal of Atmospheric and Oceanic Technology
identifier doi10.1175/JTECH-D-13-00179.1
journal fristpage1446
journal lastpage1454
treeJournal of Atmospheric and Oceanic Technology:;2014:;volume( 031 ):;issue: 006
contenttypeFulltext


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