Correction of the Sea State Impact in the L-Band Brightness Temperature by Means of Delay-Doppler Maps of Global Navigation Satellite Signals Reflected Over the Sea Surface

Marchan-Hernandez, J.F.; Rodriguez-Alvarez, Nereida; Camps, A.; Bosch-Lluis, X.; Ramos-Perez, I.; Valencia, E.

doi:10.1109/tgrs.2008.922144

Cited by 87 publications

(48 citation statements)

References 25 publications

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“…Figures 7a, 7b and 7c show respectively the estimated DDM volume, the estimated ∆T B , and the error in the estimated ∆T B , in the presence of noise [13]. A 1 ms coherent integration time followed by 100 ms incoherent integration time is expected to provide enough accuracy in the estimation of ∆T B (< 0.1 K) up to wind speeds of 14 m/s, with a negligible displacement of the specular reflection point.…”

Section: Pau Instrument Conceptmentioning

confidence: 99%

See 1 more Smart Citation

PAU in SeoSAT: A Proposed Hybrid L-band Microwave Radiometer/GPS Reflectometer to Improve Sea Surface Salinity Estimates from Space

Camps

Rodriguez-Alvarez

Bosch-Lluis

et al. 2008

2008 Microwave Radiometry and Remote Sensing of the Environment

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It is generally accepted that the best way to retrieve Sea Surface Salinity (SSS) is by means of L-band radiometry (1400-1427 MHz). However, in addition to the polarization and the incidence angle, the SSS and the sea surface temperature (SST), the sea surface brightness temperature depends on the sea state. This work describes a hybrid L-band radiometer & GPS L1 reflectometer proposed to infer sea state information at similar surface roughness scales and therefore improve the sea state correction in surface salinity estimates.

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Section: Pau Instrument Conceptmentioning

confidence: 99%

“…5. a) Wind speed dependence of the DDM volume and b) relationship between ∆T B and the DDM volume for different thresholds with respect to the maximum. a) estimated DDM volume, b) estimated ∆T B , and c) error in the estimated ∆T B , in the presence of noise[13].…”

mentioning

confidence: 99%

PAU in SeoSAT: A Proposed Hybrid L-band Microwave Radiometer/GPS Reflectometer to Improve Sea Surface Salinity Estimates from Space

Camps

Rodriguez-Alvarez

Bosch-Lluis

et al. 2008

2008 Microwave Radiometry and Remote Sensing of the Environment

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“…Recent progress has been made towards utilizing the full DDMs [3], [5], and [6]. For the retrieval algorithm, two main approaches have been used: 1) fitting real measurements to a model tuned with the desired parameters, and 2) linking the waveform or the DDM parameters to the sea state descriptor by using an empirically developed relationship.…”

Section: Introductionmentioning

confidence: 99%

New approach to sea surface wind retrieval from GNSS-R measurements

Park

Valencia

Rodriguez-Alvarez

et al. 2011

2011 IEEE International Geoscience and Remote Sensing Symposium

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So far, GNSS-R studies on sea surface wind retrieval from Delay-Doppler Maps (DDM) have focused on the best fitting of the model to the measurements. This paper proposes a new approach to retrieve the sea surface wind using DDM deconvolution. The proposed method is based on the direct restoration of scattering coefficients from two measured DDMs. Using the restored scattering coefficient images, the sea surface slope is estimated, and eventually the wind speed is retrieved from the sea surface slope. This paper presents the performance of the proposed method with the simulation results, and the advantages of the method.

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“…Recent studies on GNSS-R have yielded promising results on various applications such as altimetry [1], sea state [2][3][4][5], and soil moisture [6][7][8]. Currently, a spaceborne demonstrator mission has been proposed for altimetry applications [9], and others have been proposed for sea state monitoring [10].…”

Section: Introductionmentioning

confidence: 99%

End-to-end simulator for Global Navigation Satellite System Reflectometry space mission

Park¹,

Marchan-Hernandez²,

Rodriguez-Alvarez³

et al. 2010

2010 IEEE International Geoscience and Remote Sensing Symposium

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This paper presents an end-to-end simulator to assess the performances of Global Navigation Satellite System Reflectometry (GNSS-R) space missions for altimetry or sea state determination. The presented simulator is capable of simulating the GNSS-R observation scenario including the states of the transmitting and receiving satellites, the full instrument modeling, and scattering physical modeling based on an actual geophysical database. It provides useful tools for research and development on GNSS-R remote sensing.

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Correction of the Sea State Impact in the L-Band Brightness Temperature by Means of Delay-Doppler Maps of Global Navigation Satellite Signals Reflected Over the Sea Surface

Cited by 87 publications

References 25 publications

PAU in SeoSAT: A Proposed Hybrid L-band Microwave Radiometer/GPS Reflectometer to Improve Sea Surface Salinity Estimates from Space

PAU in SeoSAT: A Proposed Hybrid L-band Microwave Radiometer/GPS Reflectometer to Improve Sea Surface Salinity Estimates from Space

New approach to sea surface wind retrieval from GNSS-R measurements

End-to-end simulator for Global Navigation Satellite System Reflectometry space mission

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