研究目的
To demonstrate the viability of making simultaneous wind and current measurements from space using the DopplerScatt instrument and to develop Ka-band Geophysical Model Functions (GMFs) for translating backscatter and Doppler measurements into surface winds and currents.
研究成果
The DopplerScatt instrument presents an airborne platform that demonstrates the viability of making simultaneous wind and current measurements from space. The results include GMFs for winds and currents that demonstrate the capability of estimating both winds and currents from Ka-band backscatter data.
研究不足
The study is limited by the need for further validation of the measurements and the development of more accurate Geophysical Model Functions (GMFs) for both winds and currents.
1：Experimental Design and Method Selection:
The DopplerScatt instrument, a Ka-band pencil-beam Doppler scatterometer, was used to measure ocean surface currents and winds simultaneously. The instrument architecture builds on rotating pencil-beam scatterometers and adds Doppler estimation.
2：Sample Selection and Data Sources:
The instrument participated in several field campaigns, including the Sub-mesoscale Processes and Lagrangian Analysis on the Shelf (SPLASH) campaign.
3：List of Experimental Equipment and Materials:
DopplerScatt instrument with a vertically polarized single-beam Ka-band coherent scatterometer using a rotating pencil-beam antenna.
4：Experimental Procedures and Operational Workflow:
The data were recorded coherently on board and processed on the ground to estimate radial velocities by using pulse-pair phase differences and normalized radar backscatter cross-sections, σ
5：Data Analysis Methods:
The azimuth diversity of the measurements allows for inversion of both vector surface velocities and winds. Geophysical Model Functions (GMFs) were developed to translate backscatter and Doppler measurements into surface winds and currents.
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