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Geometry Calibration Method of GF-1b Satellite Based on Base Map

A No. 1 satellite technology, applied in the field of calibration during the satellite’s in-orbit operation, can solve the problems of slow calibration speed and heavy manual workload, and achieve the effect of high overall efficiency and improved geometric accuracy

Active Publication Date: 2022-03-04
CHINA CENT FOR RESOURCES SATELLITE DATA & APPL
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  • Application Information

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Problems solved by technology

[0003] The technical problem of the present invention is: to overcome the shortcomings of the existing technology, such as large manual workload and slow calibration speed, and propose a geometric calibration method for Gaofen-1 B satellite based on the reference base map. The accuracy reference base map realizes the refinement of the attitude and orbit of the Gaofen-1B satellite, thereby improving the direct positioning accuracy of satellite panchromatic and multispectral images

Method used

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  • Geometry Calibration Method of GF-1b Satellite Based on Base Map
  • Geometry Calibration Method of GF-1b Satellite Based on Base Map
  • Geometry Calibration Method of GF-1b Satellite Based on Base Map

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Embodiment

[0017] The geometric calibration method of Gaofen-1B satellite based on the reference base map, the steps of the method include:

[0018] Step 1. Read the image to be checked from the Gaofen-1B satellite, mark the read image to be checked as reference data A, read the reference data DOM reference data and DEM reference data within the image range, and read the reference data Mark it as reference data B, and perform image matching between image A to be checked and reference data B, such as image grayscale correlation matching, to obtain several image control point coordinates, such as figure 1 As shown, generally thousands to tens of thousands;

[0019] Step 2, according to the coordinates of several image control points obtained in step 1, calculate the attitude, orbit and travel time in the strict imaging model of the Gaofen-1B satellite; the positioning accuracy of the original image is as follows: figure 2 As shown, the solution method is: use the strip beam adjustment me...

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Abstract

The invention relates to a geometric calibration method of the Gaofen-1B satellite based on a reference base map, and belongs to the technical field of satellite calibration during on-orbit operation. The method of the invention can obviously improve the geometric precision of the image, and the overall efficiency is high. All digital information or data are used in the method of the present invention, and algorithms such as automatic matching are used to realize geometric calibration processing, which can realize fully automatic geometric calibration without manual participation.

Description

technical field [0001] The invention relates to a geometric calibration method of the Gaofen-1B satellite based on a reference base map, and belongs to the technical field of satellite calibration during on-orbit operation. Background technique [0002] For a satellite system, although the geometric and radiation calibration of the camera has been performed before launch, due to the influence of factors such as vibration during launch and changes in the operating environment in orbit, the camera parameters of the satellite in orbit will generally change. , so it is necessary to re-check the geometric parameters of the camera, so as to improve the positioning accuracy of its products. Contents of the invention [0003] The technical problem of the present invention is: to overcome the shortcomings of the existing technology, such as large manual workload and slow calibration speed, and propose a geometric calibration method for Gaofen-1 B satellite based on the reference ba...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 龙小祥李庆鹏魏宝安李晓进
Owner CHINA CENT FOR RESOURCES SATELLITE DATA & APPL