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Low-orbit satellite solar telescope remote sensing image registration method based on FMT

A technology for solar telescopes and remote sensing images, applied in the field of space remote sensing detection, can solve problems such as the influence of solar telescope imaging performance, image registration accuracy, and satellite platform pointing errors.

Active Publication Date: 2020-04-24
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

Due to the certain pointing error and stability of the satellite platform, and the spin of the satellite during each orbit around the earth, these factors will affect the imaging performance and image registration accuracy of the solar telescope.

Method used

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  • Low-orbit satellite solar telescope remote sensing image registration method based on FMT
  • Low-orbit satellite solar telescope remote sensing image registration method based on FMT
  • Low-orbit satellite solar telescope remote sensing image registration method based on FMT

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specific Embodiment approach 1

[0038] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the invention should not be limited by this.

[0039] The FMT-based low-orbit satellite solar telescope remote sensing image registration method of the present invention comprises the following steps:

[0040] (1) Take the solar telescope in the sun-synchronous orbit as an example: the height of the sun-synchronous orbit is H=830km, the average radius of the earth is Re=6378km, and the CCD detector panel of the solar telescope is CCD x ×CCD y array, for sun pointing observations such as figure 1 shown.

[0041] Such as figure 2 As shown, combined with the US GOES-R satellite observation data already in orbit, N pieces of solar observation images I 1 , I 2 、…I N , forming the image matrix I N , N solar observation images I 1 , I 2 、…I N The corresponding time series are t 1 , t 2 ,...t N , forming a time matrix ...

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Abstract

A low-orbit satellite solar telescope remote sensing image registration method belongs to the space remote sensing detection field, and comprises the following steps: obtaining N sun observation images to form an image matrix and a time matrix; calculating a satellite platform pointing error ESN, a platform stability EPN and a spin error RN; processing the image matrix by using a Fourier-Mellin algorithm to generate an x-direction translation matrix XN, a y-direction translation matrix YN and a z-direction rotation matrix theta N; calculating an image x-direction translation matrix X 'N, a y-direction translation matrix Y' N and a z-direction rotation matrix theta 'N caused by the ESN, the EPN and the RN; calculating correlation coefficients of XN and X 'N, YN and Y' N, and theta N and theta 'N, calculating the optimal solution Xf of an x-direction translation matrix, the optimal solution Yf of a y-direction translation matrix and the optimal solution theta f of a z-direction rotationmatrix through a least square method, conducting image correction to obtain an accurate sun observation image. The real-time dynamic condition of the sun can be truly and accurately reflected.

Description

technical field [0001] The invention belongs to the technical field of space remote sensing detection, and in particular relates to an FMT-based remote sensing image registration method of a low-orbit satellite solar telescope. Background technique [0002] The sun is the source of changes in the earth's space environment and the primary monitoring target for space weather forecasting. The extreme ultraviolet and X-ray bands can monitor solar activity changes with the greatest sensitivity and provide far more abundant information than other bands. Putting observation instruments on the satellite platform and using short-wave optics to observe and study the sun from space has gradually become the mainstream means of observing the sun in the world. For example, the US Solar Dynamics Observatory (SDO) satellite program and the Geostationary Operational Environmental Satellites (GOES) satellite program are equipped with extreme ultraviolet band instruments to observe the sun. m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/30
CPCG06T7/30G06T2207/10032
Inventor 丁广兴陈波何玲平王彭刘阳宋克非代霜张佩杰
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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