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Rapid analogue method of synthetic aperture radar (SAR) large range forest scene remote sensing data

A simulation method and remote sensing data technology, applied in the field of synthetic aperture radar forest remote sensing, can solve the problems of high computational complexity, large amount of data, inability to apply large-scale forest remote sensing data simulation, etc., to improve simulation efficiency, high-precision simulation, The effect of reducing the number of

Inactive Publication Date: 2011-08-24
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

Due to the high computational complexity and large amount of data, the existing simulation models and methods cannot be applied to the simulation of large-scene forest remote sensing data under high-resolution SAR systems.

Method used

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  • Rapid analogue method of synthetic aperture radar (SAR) large range forest scene remote sensing data
  • Rapid analogue method of synthetic aperture radar (SAR) large range forest scene remote sensing data
  • Rapid analogue method of synthetic aperture radar (SAR) large range forest scene remote sensing data

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Embodiment

[0033] The SAR system is used to carry out the simulation experiment of the remote sensing data of the forest scene, and the simulation results are obtained through the back projection (BP) imaging algorithm for imaging processing. The area of ​​the forest plot is 25hm 2 , the number of trees is 1000, and the tree species are broad-leaved trees; the SAR flight altitude is 3000m, the central viewing angle is 45 degrees, the SAR system resolution is 1m, the radar antenna beamwidth is 0.1rad, the radar works in the L-band with a wavelength of 0.24m, and the antenna adopts fully polarized mode.

[0034] A fast simulation method for remote sensing data of SAR large-scale forest scene, the schematic diagram of the implementation effect of the technical scheme is as follows figure 1 As shown, the steps are as follows:

[0035] 1) Define relevant parameters, such as figure 2 As shown, including coordinate system definition and forest scene definition:

[0036] 1.1 Define a three-...

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Abstract

The invention relates to a rapid analogue method of SAR large range forest scene remote sensing data, belonging to the technical field ofremotely sensing the SAR forest. The method comprises the following steps of: defining parameters, dividing scenes, acquiring the central position of a virtual scattering unit and equivalent radar backward scattering coefficients, and calculating SAR forest remote sensing analogue data. The method in the invention performs equivalent to SAR echo signal response of a plurality of real scattering units of the forest scene by the echo signal response of the virtual scattering unit through the equivalent scattering processing method so as to reduce the quantity of forest scene virtual scattering unit, achieve the purpose of improving the data analogue efficiency of SAR original echo data and realize rapid high-precise analogue of the large range forest remote sensing original data under a high resolution SAR system.

Description

technical field [0001] The invention relates to a fast simulation method for synthetic aperture radar (SAR) large-scale forest scene remote sensing data, belonging to the technical field of synthetic aperture radar forest remote sensing. Background technique [0002] Forests are the main body of the earth's ecological materials. Estimation of regional and global forest biomass is of great significance for detecting ecosystem carbon cycle and climate change, and is one of the important contents of ecology and global change research. In recent years, the role of synthetic aperture radar remote sensing technology in forest information detection has been widely concerned, and it has become a powerful tool for forest biomass estimation in a large area on the ground. The original data simulation technology plays an important role in the application of SAR forest remote sensing. On the one hand, it reveals the forward modeling mechanism of remote sensing, and on the other hand, it ...

Claims

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Application Information

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IPC IPC(8): G01S7/41G01S13/90
Inventor 曾涛胡程孙晗伟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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