Construction method for ionospheric three-dimensional probe satellite-bone SAR imaging processing platform

A stereoscopic detection and imaging processing technology, applied in the field of signal processing, can solve problems such as poor resolution, inability to achieve stereoscopic imaging, and inability to accurately observe irregular objects

Active Publication Date: 2009-09-23
BEIHANG UNIV
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Problems solved by technology

It makes up for the poor resolution of the existing ionospheric detection technology, the inability to accurately observe irregular objects and the inability to realize stereoscopic imaging, and lays a solid technical foundation for the development of a new generation of ionospheric space environment detection payload system

Method used

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  • Construction method for ionospheric three-dimensional probe satellite-bone SAR imaging processing platform
  • Construction method for ionospheric three-dimensional probe satellite-bone SAR imaging processing platform
  • Construction method for ionospheric three-dimensional probe satellite-bone SAR imaging processing platform

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Embodiment Construction

[0090] Next, the effectiveness of the signal processing algorithm of the platform is verified by using the echo data of the top ionosphere point target obtained from the simulation of specific satellite orbit parameters and radar parameters.

[0091] Table 1 and Table 2 give the satellite orbit parameters and radar parameters respectively.

[0092] Table 1 Satellite orbit parameters

[0093]

[0094] Table 2 Radar parameters

[0095]

[0096] The three-dimensional echo data of the single-point target and the lattice target at 400 kilometers above the equator are processed according to the following steps. The imaging processing platform is developed with software Microsoft Visual C++6.0 and runs on a computer. The main configuration requirements of the computer are CPU Centrino dual-core 1.8GHz, memory 3G, hard disk 120G.

[0097] A method for constructing an ionospheric three-dimensional detection spaceborne SAR imaging processing platform, the specific steps of the ...

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Abstract

The invention relates to a construction method for an ionospheric three-dimensional probe satellite-bone SAR imaging processing platform, comprising the twelve steps of: step 1: initiating parameters and reading echo signal; step 2: carrying out orientation transformation toward Fourier; step 3: multiplying by Chirp Scaling (CS) factors; step 4: carrying out distance transformation toward Fourier; step 5: multiplying by distance compensation factors; step 6: carrying out distance inverse transformation toward Fourier; step 7: multiplying by orientation compensating factors; step 8: carrying orientation inverse transformation toward Fourier; step 9: multiplying by orientation Deramp factors; step 10: carrying out orientation transformation toward Fourier; step 11: carrying transverse toward Fourier; and step 12, outputting three-dimensional compression signals. The invention has the advantages of compact structure and fast processing speed, can generate three-dimensional distribution images with high resolution, realizes three-dimensional fine observation of an ionospheric irregular body on a top layer, lays solid technical foundation for developing new-generation ionospheric space environment detection load systems, and has wide practical value and application prospect.

Description

(1) Technical field [0001] The invention relates to a space-borne synthetic aperture radar (SAR) three-dimensional signal imaging processing platform, in particular to a construction method of a space-borne SAR imaging processing platform for three-dimensional ionospheric detection, belonging to the technical field of signal processing. (2) Background technology [0002] The ionosphere is one of the important components of the earth's space environment, and its altitude extends from about 60 kilometers to 1000 kilometers above the ground. There are a large number of free electrons, ions and uncharged particles in the ionosphere, forming a highly ionized plasma. In addition, due to the instability of the plasma and its dynamic changes, a large number of ionospheric irregularities similar to coherent structures are distributed along the Earth's magnetic field lines, and they mainly exist in the Earth's equatorial and polar regions. [0003] The ionosphere will cause serious i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
Inventor 陈杰李卓杨威李琳李春升周荫清
Owner BEIHANG UNIV
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