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Single-pass full-polarization interferometric synthetic aperture radar (SAR)

An interference synthetic aperture and full polarization technology, which is applied in the directions of radio wave reflection/reradiation, utilization of reradiation, and measurement devices, can solve problems such as the complexity of polarization interference mechanism, improve coherence, and improve measurement accuracy Effect

Active Publication Date: 2012-01-25
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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Problems solved by technology

Because the mechanism of polarization interference is extremely complex, so far these studies are still in the preliminary stage of exploration

Method used

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  • Single-pass full-polarization interferometric synthetic aperture radar (SAR)
  • Single-pass full-polarization interferometric synthetic aperture radar (SAR)
  • Single-pass full-polarization interferometric synthetic aperture radar (SAR)

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Embodiment Construction

[0051] The present invention will be described in further detail below in conjunction with accompanying drawing:

[0052] Such as figure 1 As shown, the full polarization radar needs two receiving channels to simultaneously receive two different polarization signals of H and V. Most spaceborne SAR systems use active phased array antennas, and set two receiving channels in the T / R component to receive two polarized signals at the same time; some use a single receiving channel T / R component, and use a full antenna when transmitting , when receiving, the antenna is divided into two pieces, one of which receives the H signal, and the other receives the V signal, so as to realize dual-polarization simultaneous reception. Obviously, the latter solution can greatly reduce the complexity of T / R components, reduce the system volume, weight and development cost. The disadvantage is that the antenna gain is reduced by 3dB during reception. In order to ensure the signal-to-noise ratio o...

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Abstract

The invention relates to a single-pass full-polarization interferometric synthetic aperture radar (SAR) which combines a polarization technology and an interferometric technology. The single-pass full-polarization interferometric SAR comprises a dual-polarization active phased-array antenna, a receiving sub-machine, a calibration and acquisition sub-machine, a monitoring sub-machine, a distribution sub-machine and a recorder. By adoption of the single-pass full-polarization interferometric SAR, the polarization interferometric SAR data of eight channels can be simultaneously obtained, and a three-dimensional topographic map of a target scene can be obtained through interferometry. The obtained polarization interferometric SAR data can be applied to vegetation parameter inversion in forestry and agriculture and can be also applied to detection of surface deformation in an earthquake disaster and large-area three-dimensional topographic mapping.

Description

technical field [0001] The invention belongs to the technical field of synthetic aperture radar, and in particular relates to a single-pass full-polarization interference synthetic aperture radar combining polarization technology and interference technology. [0002] The invention can simultaneously obtain the polarization interference SAR (Synthetic Aperture Radar) data of 8 channels, and can obtain the three-dimensional topographic map of the target scene through interference processing. [0003] The polarimetric interferometric SAR data obtained by the present invention can be applied to the inversion of vegetation parameters in forestry and agriculture, and can also be applied to the detection of surface deformation in earthquake disasters (such as collapse of houses and bridges, landslides, debris flows, etc.), and can be used for large-scale 3D topographic mapping. Background technique [0004] Synthetic aperture radar is an active microwave remote sensing system prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
Inventor 汪洋湛金童郑陶冶
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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