High-precision calibration positioning device for radar satellites and GNSS satellites

A positioning device and calibration technology, which is applied in the satellite radio beacon positioning system, adopts electrical devices, measuring devices, etc., can solve problems such as difficult to improve, achieve high-precision radiation calibration and high-precision positioning, and overcome the problem of decoherence Effect

Pending Publication Date: 2020-09-04
WUHAN UNIV
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Problems solved by technology

The high-precision measurement GNSS deformation monitoring receiver can obtain high-precision (1-3mm) horizontal displacement, but the deformation monitoring ability in the elevation direction is affected by the atmospheric troposphere, which has been difficult to improve, and the accuracy is about 3-5mm

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  • High-precision calibration positioning device for radar satellites and GNSS satellites
  • High-precision calibration positioning device for radar satellites and GNSS satellites
  • High-precision calibration positioning device for radar satellites and GNSS satellites

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Embodiment Construction

[0054] figure 1 A schematic diagram of a calibration and positioning device provided by an embodiment of the present invention; figure 2 for figure 1 Schematic diagram of another viewing angle of the calibration and positioning device shown. Such as figure 1 and figure 2 , the calibration and positioning device includes two dihedral reflectors for reflecting radar satellite signals, one of the two dihedral reflectors includes a first panel 1 and a second panel 2 perpendicular to each other, the two The other of the two dihedral reflectors includes a third panel 3 and a fourth panel 4 that are perpendicular to each other. Such as image 3 ,accessible Figure 4 The shown right-angled connector 6 realizes the vertical connection between the first panel 1 and the second panel 2, and the third panel 3 and the fourth panel 4, and the corresponding positions of the connector 6 and the panels 1, 2, 3, 4 have Screw holes for fastening bolts. The panels 1, 2, 3 and 4 are made ...

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Abstract

The invention discloses a high-precision calibration positioning device for a radar satellite and a GNSS satellite. The high-precision calibration positioning device comprises: a bottom plate; a basewhich is fixed on the bottom plate and can rotate; a mounting table which is fixed on the base, wherein the top of the mounting table is provided with a GNSS antenna mounting structure, the tangent lines of the first side face and the second side face with the horizontal plane are consistent with the flight direction of the lifting orbit radar satellite, and the included angles between the first side face and the vertical plane and between the second side face and the vertical plane are matched with the local incident angles of the lifting orbit radar satellite; the two dihedral corner reflectors are used for reflecting radar satellite signals, are fixed on the first side surface and the second side surface of the mounting table, are respectively parallel to the direction of a radar lifting rail and are respectively adapted to the local incident angles of the radar signals of the lifting rail. According to the calibration positioning device, the RCS theoretical maximum value of radar satellite signal two-side right-angle reflection is achieved, and the calibration positioning device can be used for satellite-borne SAR radiation calibration and InSAR deformation monitoring and synchronously achieve GNSS positioning.

Description

technical field [0001] The invention belongs to the fields of radiation calibration and geometric calibration of radar satellite remote sensing images, differential radar interferometry, radar satellite time series analysis technology to monitor surface deformation, etc., and also relates to the field of GNSS high-precision deformation monitoring, in particular to a radar for radar High-precision calibration and positioning device for satellites and GNSS satellites. Background technique [0002] As a good passive radar calibration device, the artificial triangular reflector can be used for accurate radiometric calibration of spaceborne SAR images. At present, the main reflective structure of metal artificial triangular reflectors is a regular triangular pyramid, which has a relatively stable and large radar cross-sectional area, is generally electrically large in size, and exhibits a 3dB beamwidth independent of wavelength and size. Sometimes in order to obtain greater rada...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/40G01S19/23G01S7/40G01B7/16G01B7/02
CPCG01B7/02G01B7/16G01B21/042G01S7/4004G01S7/4026G01S19/235G01S19/40
Inventor 李陶张妍岩
Owner WUHAN UNIV
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