Airborne double-waveband synthetic aperture radar system and method for measuring vegetation thickness utilizing same
A radar system and interferometric synthetic aperture technology, which is applied in the field of interferometric synthetic aperture radar and microwave remote sensing, can solve the problems of high accuracy of elevation estimation and low accuracy of vegetation thickness estimation, and achieve the effect of expanding the application range
Active Publication Date: 2015-06-03
INST OF ELECTRONICS CHINESE ACAD OF SCI
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[0006] When the long-wave-band-based polarization interferometry technique described above is used to estimate vegetation thickness, the estimation accuracy of terrain elevation is high, but the estimation accuracy of vegetation thickness is low.
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[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0028] The airborne dual-band interferometric synthetic aperture radar system of the present invention comprises an airborne platform, an antenna system, a stable platform, a distributed POS (Position and Orientation System) and an in-cabin unit.
[0029] The airborne platform is used to carry the stable platform, antenna system and cabin unit.
[0030] The stabilization platform is mounted on the carrier platform and is used for beam stabilization and pointing control of the Ka-band transceiver antenna group. According to a preferred embodiment of the present invention, it is an LH system PAV series stabilized platform, which is a high-performance, high-reliability aerial gyro stabilized platform developed by Leica Corpo...
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The invention discloses an airborne double-waveband synthetic aperture radar system and a method for measuring vegetation thickness utilizing same. The airborne double-waveband synthetic aperture radar system includes: an airborne platform, an antenna system, a stabilization platform, and a distributed POS. The antenna system includes an L-band main receiving and transmitting antenna, two L-band vice receiving and transmitting antennas, and a Ka-band receiving and transmitting antenna group. The method for measuring vegetation thickness includes: taking the L-band main receiving and transmitting antenna and the L-band vice receiving and transmitting antennas as flexible long base lines, measuring corresponding phase center positions of the three antennas by the distributed POS, obtaining time-varying information of the phase centers of the antennas during imaging period, and meanwhile carrying out wave beam stabilization and direction control for the Ka-band receiving and transmitting antenna by utilizing the stabilization platform; combining POS data with signals received by each antenna to carry out imaging processing respectively; carrying out interference processing for the imaging results of the L-band and the Ka-band, and obtaining an object scene DTM and an object scene DSM; and obtaining vegetation thickness information by subtracting one of the DTM and the DSM by the other. With the airborne double-waveband synthetic aperture radar system and the method for measuring vegetation thickness utilizing same, application range of an airborne radar in the microwave sensing field is expanded.
Description
technical field [0001] The invention belongs to the field of Interferometric Synthetic Aperture Radar (Interferometric Synthetic Aperture Radar, InSAR) and microwave remote sensing technology, and specifically relates to an airborne dual-band synthetic aperture radar system and a method for measuring the thickness of vegetation by using the same, especially using an airborne synthetic aperture radar The system uses interferometric technology in the L and Ka dual bands to obtain the terrain information and surface vegetation information of the target scene. Background technique [0002] Airborne Interferometric Synthetic Aperture Radar (InSAR) has been relatively mature in the development of 3D imaging technology for target scenes, and the main working modes include single-antenna double-pass and dual-antenna single-pass. Compared with the double-pass method, the single-pass method can effectively overcome the problems of time decoherence and non-parallel flight paths, so it ...
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IPC IPC(8): G01S13/90G01S7/41
Inventor 李道京刘波杨宏潘洁
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI