研究目的
To establish the ocean surface wind speed inversion method based on IALT and assess its in-orbit performance.
研究成果
The IALT wind speed inversion accuracy, with an RMS of 1.85m/s and a bias of -0.21m/s, satisfies its performance requirement. The method demonstrates the capability of IALT for accurate ocean surface wind speed measurement.
研究不足
The on-orbit absolute calibration of antenna pattern needs further development. The assessment is limited to the period until 30th April, 2017, with ECMWF data only available up to 31th January 2017.
1：Experimental Design and Method Selection:
The neural network algorithm is used for ocean surface wind speed retrieval from IALT data.
2：Sample Selection and Data Sources:
IALT NRCS data is collocated with ECMWF reanalysis wind speed data, NDBC buoy wind speed, and in-situ measurement wind speed for training and validation.
3：List of Experimental Equipment and Materials:
IALT on board Tiangong-2 space station, ECMWF reanalysis wind field product, NDBC buoys, and in-situ measurement equipment.
4：Experimental Procedures and Operational Workflow:
Data preprocessing, quality control, model training with neural network algorithm, and accuracy assessment.
5：Data Analysis Methods:
Comparison of retrieved wind speed with ECMWF, buoy, and in-situ measurements to evaluate inversion accuracy.
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