研究目的
To develop and test multiband (L, C, and X bands) circularly polarized synthetic aperture radar (CP-SAR) for microsatellite SAR constellation for monitoring global land deformation and environment.
研究成果
The multiband CP-SAR systems worked well on flight tests, demonstrating readiness for improvement for microsatellite constellation to monitor global land deformation and environment.
研究不足
The design must be efficient on power consumption and maintain stable axial ratio for circular polarization, especially at lower incidence angles to reduce transmitting power.
1：Experimental Design and Method Selection:
The project involves the development of CP-SAR sensors for microsatellite constellation, including antenna deployment, RF system design, and ground-flight tests.
2：Sample Selection and Data Sources:
Flight tests were conducted in Indonesia using X Band SAR onboard a Boeing 737-200 and C band CP-SAR system onboard CN235 aircraft.
3：List of Experimental Equipment and Materials:
Includes microstrip antenna as feeder of parabolic antenna, SAR Transmitter (TX) Unit, SAR Receiver (RX) Unit, SAR Signal Generator Unit, SAR Controller Unit, and Power Supply Unit.
4：Experimental Procedures and Operational Workflow:
Flight tests were conducted to validate the SAR systems' performance under specified conditions.
5：Data Analysis Methods:
Analysis of SAR images acquired during flight tests to assess system performance.
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