GPS signal scattering from sea surface: Wind speed retrieval using experimental data and theoretical model

被引:82
作者
Komjathy, A
Zavorotny, VU
Axelrad, P
Born, GH
Garrison, JL
机构
[1] Univ Colorado, CCAR, Boulder, CO 80309 USA
[2] Univ Colorado, CIRES, NOAA, ETL, Boulder, CO 80309 USA
[3] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
基金
美国国家航空航天局;
关键词
D O I
10.1016/S0034-4257(00)00091-2
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Global Positioning System (GPS) signals reflected from the ocean surface have potential use for various remote sensing purposes. Some possibilities are measurements of surface roughness characteristics from which wave height, wind speed, and direction could be determined. For this paper; GPS-reflected signal measurements collected at aircraft altitudes of 2 km to 5 km with delay-Doppler mapping GPS receiver are used to explore the possibility of determining wind speed. To interpret the GPS data, a theoretical model has been developed that describes the power. of the reflected CPS signals for different time delays and Doppler frequencies as a function of geometrical and environmental parameters. The results indicate a good agreement between the measured and the modeled normalized signal power waveforms during changing surface wind conditions. The estimated rr,ind spc en using surface-reflected GPS data, obtained by comparing actual and modeled waveforms, shows good ;agreement (within 2 m/s) with delta obtained from a nearby buoy and independent wind speed measurements derived from the TOPEX/Poseidon altimetric satellite. (C)Elsevier Science Inc., 2000.
引用
收藏
页码:162 / 174
页数:13
相关论文
共 21 条
[2]  
AUBER JC, 1994, PROCEEDINGS OF ION GPS-94: 7TH INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE DIVISION OF THE INSTITUTE OF NAVIGATION, PTS 1 AND 2, P1155
[3]  
Bass F., 1979, INT SERIES NATURAL P, V93
[4]  
Beckmann P, 1987, The scattering of electromagnetic waves from rough surfaces
[5]  
CLIFFORD SF, 1998, P INT GEOSC REM SENS, V4, P2005
[6]   MEASUREMENT OF THE ROUGHNESS OF THE SEA SURFACE FROM PHOTOGRAPHS OF THE SUNS GLITTER [J].
COX, C ;
MUNK, W .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, 1954, 44 (11) :838-850
[7]   A unified directional spectrum for long and short wind-driven waves [J].
Elfouhaily, T ;
Chapron, B ;
Katsaros, K ;
Vandemark, D .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1997, 102 (C7) :15781-15796
[8]   Effect of sea roughness on bistatically scattered range coded signals from the Global Positioning System [J].
Garrison, JL ;
Katzberg, SJ ;
Hill, MI .
GEOPHYSICAL RESEARCH LETTERS, 1998, 25 (13) :2257-2260
[9]  
GARRISON JL, 1997, IEEE SOUTHEASTCON BL
[10]  
*GEC PLESS SEM, 1996, GLOB POS PROD HDB