Title :
A spaceborne LFM scatterometer for ocean surface wind vector measurement-a time domain approach
Author :
Pillai, N.S. ; Jha, A.M. ; Misra, Tapan
Author_Institution :
Space Appl. Centre, Ahmedabad, India
fDate :
9/1/1988 12:00:00 AM
Abstract :
The limitations of the currently used continuous-wave-pulse (CW-pulse) spaceborne scatterometers for wind-vector retrieval are reviewed. The disadvantages due to purely time-domain or frequency-domain (Doppler filtering) approaches are described. To overcome the limitations of these methods, a modified scheme is proposed wherein the pulse transmitted is linearly frequency modulated (LFM) and the processing is carried out in the time domain. This method is described and compared with other techniques to highlight the improved results obtainable with this LFM technique
Keywords :
atmospheric techniques; radar applications; remote sensing; wind; CW pulse; LFM technique; atmosphere; continuous-wave-pulse; frequency-domain; linearly frequency modulated; marine boundary layer; method; modified scheme; ocean surface wind vector measurement; remote sensing; spaceborne LFM scatterometer; time domain approach; Chirp modulation; Digital filters; Filtering; Frequency modulation; Oceans; Pulse modulation; Radar measurements; Sea measurements; Sea surface; Spaceborne radar; Time domain analysis; Time measurement;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
