A revised geophysical model function for the advanced scatterometer (ASCAT) at NOAA/NESDIS

Seubson Soisuvarn; Zorana Jelenak; Paul S. Chang; Qi Zhu

doi:10.1109/IGARSS.2010.5650850

A revised geophysical model function for the advanced scatterometer (ASCAT) at NOAA/NESDIS

Seubson Soisuvarn, Zorana Jelenak, Paul S. Chang, Qi Zhu

Cooperative Programs for the Advancement of Earth System Science

National Oceanic and Atmospheric Administration

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

The current ASCAT winds retrieval is based on the CMOD5.n geophysical model function (GMF) with the ASCAT wind data processor developed at the Royal Netherlands Meteorological Institute (KNMI). Recent validation of ASCAT wind retrieval reveals that high wind retrievals were underestimated as being compared to the operational QuikSCAT scatterometer. The goal in this paper is to improve ASCAT wind retrievals at high winds. In this paper we map the radar backscatter (σ₀) as a function of extreme wind conditions as measured by an airborne scatterometer and adjusted the isotropic term in CMOD5.n to follow the aircraft GMF trend. The geophysical model function validation shows the model σ₀ that calculated from QuikSCAT wind inputs are improved for σ₀ approximately > -15 dB and in very good agreement with the ASCAT σ₀ measurement. The wind retrieval validations show wind speed rms error is improved at approximately wind speed > 12 m/s and example mean wind composite from two winter seasons shows significant in detection of storm-force winds.

Original language	English
Title of host publication	2010 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2010
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1335-1338
Number of pages	4
ISBN (Print)	9781424495658, 9781424495665
DOIs	https://doi.org/10.1109/IGARSS.2010.5650850
State	Published - 2010
Event	2010 30th IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2010 - Honolulu, United States Duration: Jul 25 2010 → Jul 30 2010

Publication series

Name	International Geoscience and Remote Sensing Symposium (IGARSS)

Conference

Conference	2010 30th IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2010
Country/Territory	United States
City	Honolulu
Period	07/25/10 → 07/30/10

Keywords

ASCAT
Geophysical model function
High winds
Ocean vector winds
QuikSCAT

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10.1109/IGARSS.2010.5650850

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Soisuvarn, S., Jelenak, Z., Chang, P. S., & Zhu, Q. (2010). A revised geophysical model function for the advanced scatterometer (ASCAT) at NOAA/NESDIS. In 2010 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2010 (pp. 1335-1338). Article 5650850 (International Geoscience and Remote Sensing Symposium (IGARSS)). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IGARSS.2010.5650850

Soisuvarn, Seubson ; Jelenak, Zorana ; Chang, Paul S. et al. / A revised geophysical model function for the advanced scatterometer (ASCAT) at NOAA/NESDIS. 2010 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2010. Institute of Electrical and Electronics Engineers Inc., 2010. pp. 1335-1338 (International Geoscience and Remote Sensing Symposium (IGARSS)).

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title = "A revised geophysical model function for the advanced scatterometer (ASCAT) at NOAA/NESDIS",

abstract = "The current ASCAT winds retrieval is based on the CMOD5.n geophysical model function (GMF) with the ASCAT wind data processor developed at the Royal Netherlands Meteorological Institute (KNMI). Recent validation of ASCAT wind retrieval reveals that high wind retrievals were underestimated as being compared to the operational QuikSCAT scatterometer. The goal in this paper is to improve ASCAT wind retrievals at high winds. In this paper we map the radar backscatter (σ0) as a function of extreme wind conditions as measured by an airborne scatterometer and adjusted the isotropic term in CMOD5.n to follow the aircraft GMF trend. The geophysical model function validation shows the model σ0 that calculated from QuikSCAT wind inputs are improved for σ0 approximately > -15 dB and in very good agreement with the ASCAT σ0 measurement. The wind retrieval validations show wind speed rms error is improved at approximately wind speed > 12 m/s and example mean wind composite from two winter seasons shows significant in detection of storm-force winds.",

keywords = "ASCAT, Geophysical model function, High winds, Ocean vector winds, QuikSCAT",

author = "Seubson Soisuvarn and Zorana Jelenak and Chang, \{Paul S.\} and Qi Zhu",

year = "2010",

doi = "10.1109/IGARSS.2010.5650850",

language = "English",

isbn = "9781424495658",

series = "International Geoscience and Remote Sensing Symposium (IGARSS)",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "1335--1338",

booktitle = "2010 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2010",

address = "United States",

note = "2010 30th IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2010 ; Conference date: 25-07-2010 Through 30-07-2010",

}

Soisuvarn, S , Jelenak, Z, Chang, PS & Zhu, Q 2010, A revised geophysical model function for the advanced scatterometer (ASCAT) at NOAA/NESDIS. in 2010 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2010., 5650850, International Geoscience and Remote Sensing Symposium (IGARSS), Institute of Electrical and Electronics Engineers Inc., pp. 1335-1338, 2010 30th IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2010, Honolulu, United States, 07/25/10. https://doi.org/10.1109/IGARSS.2010.5650850

A revised geophysical model function for the advanced scatterometer (ASCAT) at NOAA/NESDIS. / Soisuvarn, Seubson ; Jelenak, Zorana; Chang, Paul S. et al.
2010 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2010. Institute of Electrical and Electronics Engineers Inc., 2010. p. 1335-1338 5650850 (International Geoscience and Remote Sensing Symposium (IGARSS)).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - A revised geophysical model function for the advanced scatterometer (ASCAT) at NOAA/NESDIS

AU - Soisuvarn, Seubson

AU - Jelenak, Zorana

AU - Chang, Paul S.

AU - Zhu, Qi

PY - 2010

Y1 - 2010

N2 - The current ASCAT winds retrieval is based on the CMOD5.n geophysical model function (GMF) with the ASCAT wind data processor developed at the Royal Netherlands Meteorological Institute (KNMI). Recent validation of ASCAT wind retrieval reveals that high wind retrievals were underestimated as being compared to the operational QuikSCAT scatterometer. The goal in this paper is to improve ASCAT wind retrievals at high winds. In this paper we map the radar backscatter (σ0) as a function of extreme wind conditions as measured by an airborne scatterometer and adjusted the isotropic term in CMOD5.n to follow the aircraft GMF trend. The geophysical model function validation shows the model σ0 that calculated from QuikSCAT wind inputs are improved for σ0 approximately > -15 dB and in very good agreement with the ASCAT σ0 measurement. The wind retrieval validations show wind speed rms error is improved at approximately wind speed > 12 m/s and example mean wind composite from two winter seasons shows significant in detection of storm-force winds.

AB - The current ASCAT winds retrieval is based on the CMOD5.n geophysical model function (GMF) with the ASCAT wind data processor developed at the Royal Netherlands Meteorological Institute (KNMI). Recent validation of ASCAT wind retrieval reveals that high wind retrievals were underestimated as being compared to the operational QuikSCAT scatterometer. The goal in this paper is to improve ASCAT wind retrievals at high winds. In this paper we map the radar backscatter (σ0) as a function of extreme wind conditions as measured by an airborne scatterometer and adjusted the isotropic term in CMOD5.n to follow the aircraft GMF trend. The geophysical model function validation shows the model σ0 that calculated from QuikSCAT wind inputs are improved for σ0 approximately > -15 dB and in very good agreement with the ASCAT σ0 measurement. The wind retrieval validations show wind speed rms error is improved at approximately wind speed > 12 m/s and example mean wind composite from two winter seasons shows significant in detection of storm-force winds.

KW - ASCAT

KW - Geophysical model function

KW - High winds

KW - Ocean vector winds

KW - QuikSCAT

UR - https://www.scopus.com/pages/publications/78650882972

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DO - 10.1109/IGARSS.2010.5650850

M3 - Conference contribution

AN - SCOPUS:78650882972

SN - 9781424495658

SN - 9781424495665

T3 - International Geoscience and Remote Sensing Symposium (IGARSS)

SP - 1335

EP - 1338

BT - 2010 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2010

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2010 30th IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2010

Y2 - 25 July 2010 through 30 July 2010

ER -

Soisuvarn S , Jelenak Z, Chang PS, Zhu Q. A revised geophysical model function for the advanced scatterometer (ASCAT) at NOAA/NESDIS. In 2010 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2010. Institute of Electrical and Electronics Engineers Inc. 2010. p. 1335-1338. 5650850. (International Geoscience and Remote Sensing Symposium (IGARSS)). doi: 10.1109/IGARSS.2010.5650850

A revised geophysical model function for the advanced scatterometer (ASCAT) at NOAA/NESDIS

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