研究目的
To assess the performances of RFSCAT in terms of backscatter measurements and wind retrieval.
研究成果
The preliminary results show that the backscatter precision of the measured slices is generally higher than 20%. After aggregating slices into a certain WVC, the precision of WVC-σ0 becomes 5%-20%, except for the winds below 3 m/s. Moreover, the retrieved wind quality meets the mission requirements (root-mean-square errors of 2.0 m/s and 20° for wind speed and direction respectively).
研究不足
The study is a prelaunch analysis, and actual performance may vary post-launch. The analysis is limited to rain-free conditions.
1：Experimental Design and Method Selection:
A forward model is developed to simulate the ocean backscatter signals under certain wind conditions, and a wind inversion processor is used to retrieve sea surface wind vectors from the outputs of the forward model.
2：Sample Selection and Data Sources:
ECMWF output winds are used as 'true' winds to simulate the 'true' sea surface radar cross section.
3：List of Experimental Equipment and Materials:
RFSCAT instrument parameters and the two-line element set (TLE) of CFOSAT platform.
4：Experimental Procedures and Operational Workflow:
The RFSCAT observing geometries are calculated, and a signal simulator accounts for the instrument noise to produce the L1B product.
5：Data Analysis Methods:
The retrieved wind quality is assessed by comparing the inverted winds with the input 'true' winds.
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