A review of satellite altimeter measurement of sea surface wind speed: With a proposed new algorithm

Chelton, Dudley B.; McCabe, Patrick J.

doi:10.1029/jc090ic03p04707

Cited by 124 publications

(71 citation statements)

References 24 publications

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“…The capacity of the radar altimeter, a nadir looking angle radar, to measure wave height from the leading edge [52] and surface roughness from the backscattering coefficient was exploited very early over oceanic surfaces [53,54]. Both of these information yield to wind speed retrieval over oceans [55].…”

Section: Toward the Restitution Of Some Snow Parametersmentioning

confidence: 99%

Antarctic Ice Sheet and Radar Altimetry: A Review

Rémy

Parouty

2009

Remote Sensing

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Abstract:Altimetry is probably one of the most powerful tools for ice sheet observation. Our vision of the Antarctic ice sheet has been deeply transformed since the launch of the ERS1 satellite in 1991. With the launch of ERS2 and Envisat, the series of altimetric observations now provides 19 years of continuous and homogeneous observations that allow monitoring of the shape and volume of ice sheets. The topography deduced from altimetry is one of the relevant parameters revealing the processes acting on ice sheet. Moreover, altimeter also provides other parameters such as backscatter and waveform shape that give information on the surface roughness or snow pack characteristics.

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Section: Toward the Restitution Of Some Snow Parametersmentioning

confidence: 99%

Antarctic Ice Sheet and Radar Altimetry: A Review

Rémy

Parouty

2009

Remote Sensing

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“…This was computed from the difference between the observed and computed power following the least squares estimate for the th waveform: (14) in which is the function from (12) computed with the set of estimated parameters . The th waveform was rejected from the ensemble when exceeded a threshold.…”

Section: Swh (11)mentioning

confidence: 99%

Wind speed measurement using forward scattered GPS signals

Garrison

Komjáthy

Zavorotny

et al. 2002

IEEE Trans. Geosci. Remote Sensing

295

137

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Abstract-Instrumentation and retrieval algorithms are described which use the forward scattered range-coded signals from the global positioning system (GPS) radio navigation system for the measurement of sea surface roughness. This roughness has long been known to be dependent upon the surface wind speed. Experiments were conducted from aircraft along the TOPEX ground track and over experimental surface truth buoys. These flights used a receiver capable of recording the cross-correlation power in the reflected signal. The shape of this power distribution was then compared against analytical models, which employ a geometric optics approach. Two techniques for matching these functions were studied. The first recognized the most significant information content in the reflected signal is contained in the trailing edge slope of the waveform. The second attempted to match the complete shape of the waveform by approximating it as a series expansion and obtaining the nonlinear least squares estimate. Discussion is also presented on anomalies in the receiver operation and their identification and correction.

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“…As the wind speed increases the sea surface roughness increases and a greater fraction of the incident radiation is reflected away from the incident direction. At incidence angles near nadir, the power of the backscattered radiation is inversely related to wind speed but is not sensitive to wind direction (Chelton et al, 1985). Altimeter provides measurement of wind speed in this small incidence angle regime.…”

Section: Introductionmentioning

confidence: 99%

Spatial Coherence of winds and waves over the Arabian Sea and Bay of Bengal and their evolution during SW Monsoon: a novel application of along-track Radar Altimeter measurements from Space

Bhandari¹,

Shaeb

2014

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:We have examined, for the first time, the spatial coherence of oceanic parameters, namely, the ocean surface wind and significant wave height (SWH), using near-instantaneous along-track sampling over vast oceanic tracks provided by Poseidon-2 Radar Altimeter onboard Jason-1. The spatial coherence length scales over the Arabian Sea and the Bay of Bengal regions, derived using Auto correlation analysis, display interesting characteristics in relation to onset and evolution of SW Monsoon over India. The estimated spatial coherence scales are found to be of the order of 100-500 km. Generally, SWH coherence lengths over Arabian Sea are observed to increase from June to July during good monsoon year (2012). This trend is not followed for the poor monsoon year (2002). Similar trend is observed for spatial coherence scales for wind speed. The temporal evolution of analyzed spatial coherence scales of winds and waves over Arabian Sea clearly brings out the distinction between a 'good' (2012) and a 'poor' (2002) monsoon year. The spatial coherence lengths of these parameters over the Bay of Bengal are found to be shorter and do not show any systematic relation to onset and evolution of SW monsoon. Anisotropy in coherence lengths is also analyzed by treating ascending and descending tracks separately. Generally, the descending tracks measurements show higher spatial coherence lengths than the ascending ones. Like the spatial coherence scales, the anisotropy of the coherence scales over the Arabian Sea also mimics the behaviour of the strength of SW Monsoon.

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A review of satellite altimeter measurement of sea surface wind speed: With a proposed new algorithm

Cited by 124 publications

References 24 publications

Antarctic Ice Sheet and Radar Altimetry: A Review

Antarctic Ice Sheet and Radar Altimetry: A Review

Wind speed measurement using forward scattered GPS signals

Spatial Coherence of winds and waves over the Arabian Sea and Bay of Bengal and their evolution during SW Monsoon: a novel application of along-track Radar Altimeter measurements from Space

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