Selection of optimum frequency of a wind scatterometer |
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| Authors: | Abhijit Sarkar Raj Kumar Mannil Mohan |
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| Institution: | (1) Meteorology and Oceanography Division, Space Applications Centre, 380 053 Ahmedabad, India |
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| Abstract: | The problem of selecting the optimum operating frequency of a scatterometer, used for remote sensing of sea surface wind speed
has been addressed by applying the criteria of maximum sensitivity of backscattering coefficient to wind speed as well as
its correlation with wind speed. The backscattering coefficient values for sea surface were computed by the two-scale scattering
theory. To compute the atmospheric transmittance, 753 clear sky atmospheres over Indian Ocean were used. While the correlation
coefficient was uniform (0.94) throughout the frequency range of 1 to 30GHz, only frequencies above 5GHz were found sensitive
enough to yield a wind speed accuracy of ±2msec−1 and better, the accuracy improving with frequency. |
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| Keywords: | Scatterometer sea surface wind speed optimum frequency atmospheric transmittance |
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