Rain rate estimation from nadir-looking TOPEX/POSEIDON microwave radiometer (TMR) for correction of radar altimetric measurements

Rain rate estimation from nadir-looking TOPEX/POSEIDON microwave radiometer (TMR) for correction of radar altimetric measurements

Atmospheric liquid water, particularly in the form of rain, produces anomalies in the radar altimetric range measurements. Such features are observed as sudden large changes in radar backscatter as a means of identification. To quantify the rain that radar altimetric pulses encounter, the instantane...

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Veröffentlicht in:IEEE transactions on geoscience and remote sensing 1999-09, Vol.37 (5), p.2556-2568
Hauptverfasser: Varma, A.K., Gairola, R.M., Kishtawal, C.M., Pandey, P.C., Singh, K.P.
Format: Artikel
Sprache:eng
Schlagworte:
Algorithms
Altimeters
Applied geophysics
Atmospheric measurements
Backscatter
Brightness temperature
Earth sciences
Earth, ocean, space
Exact sciences and technology
Hydrology
Hydrology. Hydrogeology
Internal geophysics
Marine
Microwave measurements
Microwave radiometers
Microwave radiometry
Particle measurements
Radar
Radar measurements
Rain
Rainfall
Sea measurements
Spaceborne radar
Topex
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Zusammenfassung:Atmospheric liquid water, particularly in the form of rain, produces anomalies in the radar altimetric range measurements. Such features are observed as sudden large changes in radar backscatter as a means of identification. To quantify the rain that radar altimetric pulses encounter, the instantaneous rain estimation capability of the nadir looking multichannel microwave radiometer onboard the TOPEX/POSEIDON satellite is explored. The three frequency (18, 21, and 37 GHz) nadir looking TOPEX microwave radiometer (TMR) brightness temperature data are colocated with the special sensor microwave/imager (SSM/I) rain rates to find a new rain rate algorithm by regression over the Indian Sea. Among the colocated data on different spatial and temporal scales, the most restrictive criteria (
ISSN:0196-2892
1558-0644
DOI:10.1109/36.789650