Artificial corner reflector for SAR (synthetic aperture radar) interferometry calibration

Abstract

The invention relates to an artificial corner reflector for SAR (synthetic aperture radar) interferometry calibration. The artificial corner reflector comprises a corner reflector and a base adjustingdevice. The base adjusting device is connected with the corner reflector, and is used for carrying out multi-directional adjustment on the corner reflector. The corner reflector is a triangular pyramid structure having a folding hinge device; and after observation, the whole corner reflector is folded into a triangle plane through the hinge device. The base adjusting device comprises a longitudinal angle adjusting device, a latitudinal angle adjusting device, a pitch angle adjusting device and a tripod. The tripod is a steel tripod, and serves as a part connecting to the ground. The artificial corner reflector is suitable for calibration for surface deformation monitoring of ground subsidence and ground fracture in a plain area, has the advantages of being detachable, waterproof, high inprecision, easy to adjust and high in reliability and the like, and lays the foundation for the follow-up calibration and surface micro-deformation monitoring work.

Description

technical field [0001] The invention relates to the technical field of measurement and monitoring, and more specifically, relates to an artificial corner reflector used for calibration of synthetic aperture radar interferometry. Background technique [0002] Synthetic Aperture Radar (SAR) is a relatively high-resolution imaging radar, which can obtain relatively high-resolution two-dimensional and three-dimensional radar images under the condition of poor natural environment and meteorological environment. To produce a radar image, successive radio pulses are sent to detect the target scene, and the echoes of each pulse signal are received. The radar echo signal processing of the continuous recording allows the recordings from these multiple antenna positions to be combined. This process forms a composite antenna. aperture and allows the creation of higher resolution images than a given physical antenna. Synthetic aperture radar has the characteristics of realizing all-weat...

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Problems solved by technology

[0007] Aiming at the problems existing in the prior art, the object of the present invention is to provide an artificial corner reflector for SAR interferometry calibration, which can solve the difficulty in the calibration angle of the corner reflector during SAR interferometry. Adjustment, low precision, low portability, difficult to clean, poor reflective surface material, etc.; the artificial corner reflector used for synthetic aperture radar interferometry calibration of the present invention is suitable for detachable, anti-corrosion monitoring of land subsidence in plain areas Accumulation of water, high precision, convenient adjustment, and high reliability lay the foundation for subsequent calibration and surface micro-deformation monitoring

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