Method for testing ground sampling distance of high-accuracy remote sensing satellite based on target

A technology of ground sampling distance and remote sensing satellite, which is applied in the direction of measuring device, electromagnetic wave reradiation, radio wave measurement system, etc., can solve the problem of ground sampling distance that has not yet been seen, and achieve the effect of stable measurement results and accurate measurement of ground sampling distance

Active Publication Date: 2012-10-24
CHINA CENT FOR RESOURCES SATELLITE DATA & APPL
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Problems solved by technology

So far, there is no strict detection method for ground sampling distance in domestic and foreign literature.

Method used

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  • Method for testing ground sampling distance of high-accuracy remote sensing satellite based on target
  • Method for testing ground sampling distance of high-accuracy remote sensing satellite based on target
  • Method for testing ground sampling distance of high-accuracy remote sensing satellite based on target

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Embodiment Construction

[0016] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail, as figure 1 Shown, the inventive method step is as follows:

[0017] (1) The fan-shaped target design is as follows:

[0018] 1) It is required that the high reflectivity and low reflectivity targets of fan-shaped radial targets expand proportionally from the center of the circle to the outside, and have the same width on the same radius;

[0019] 2) Radial targets generally require that the contrast ratio of black and white target strips be greater than 5:1;

[0020] 3) The fan-shaped radial target angle must be greater than 90 degrees, generally this angle is 110 degrees, such as figure 1 shown;

[0021] 4) At the same time, ensure that the flight direction of the satellite has an angle of more than 5 degrees with the side edge of the fan-shaped radial target;

[0022] 5) The width of the black and white targets on the outer edge of the fan-shaped ra...

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Abstract

The invention discloses a method for testing the ground sampling distance of a high-accuracy remote sensing satellite based on a target. The method comprises the following steps of: (1) laying a sector-shaped radial target and guaranteeing that the target can detect the two directions of a vertical rail and an edge rail simultaneously; (2) arranging a satellite to form an image, analyzing the imaging data of the target, and calculating the ground sampling distance according to the actual imaging effect of the target: (2.1) determining a position o (x0, y0) of the center of the sector-shaped radial target at the image of the satellite; (2.2) determining a pixel coordinate (x, y) of the right sampling point; (2.3) calculating a mean value of the distances from all outer-edge mark points to the center of the sector-shaped radial target and a distance L from the origin of a sector shape to the right sampling point line or row; and (2.4) according to the radius of the sector-shaped radial target and a side-swaying angle a of the satellite, determining the ground sampling distance R of the high-accuracy remote sensing satellite in the two directions of the vertical rail and the edge rail.

Description

technical field [0001] The invention relates to a method for detecting the ground sampling distance of a remote sensing satellite, in particular to a method for detecting the ground sampling distance of a high-resolution satellite. Background technique [0002] The ground sampling distance refers to the actual ground distance represented by each pixel in the image formed by the satellite, and is an important indicator reflecting the image resolution. [0003] There are many methods for ground sampling distance. Generally, high-precision remote sensing images are used to measure the distance of large-scale typical ground objects combined with the calculation of the actual pixels of the same ground object on satellite remote sensing images. However, the calculation accuracy of this method is affected by many factors, such as high-precision remote sensing images. Its own accuracy, space sampling, etc., and the ground sampling distance is affected by satellite height, side swing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/08
Inventor 林军喻文勇
Owner CHINA CENT FOR RESOURCES SATELLITE DATA & APPL
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