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Novel sector target for evaluation of optical payload ground resolution

A ground resolution, fan-shaped technology, applied in the field of remote sensing, can solve the problems of high cost and poor stability, and achieve the effects of reducing maintenance costs, good spectral stability, and improving performance evaluation accuracy

Inactive Publication Date: 2015-04-29
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

Solve the problems of poor stability and high cost in existing technologies

Method used

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  • Novel sector target for evaluation of optical payload ground resolution
  • Novel sector target for evaluation of optical payload ground resolution
  • Novel sector target for evaluation of optical payload ground resolution

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Embodiment Construction

[0021] see Figure 1-Figure 4 , in order to evaluate the ground resolution of optical payloads, resolution targets are usually laid out on the ground, such as three-line resolution targets or fan-shaped targets, and the resolution target images acquired by the payload are detected. Although the detection method of the three-line target method is relatively simple, because the target size change is discontinuous, more accurate resolution measurement cannot be obtained in a continuous manner; Three-line resolution target; in addition, for digital optoelectronic imaging systems, due to the influence of sampling phase, the problem of resolution misjudgment may occur when using three-line targets. Compared with the three-line resolution target, the fan-shaped target has the following advantages: 1) The number of targets is large, which can effectively avoid the contingency of the detection results caused by the small number of three-line resolution target lines; Continuous resolut...

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Abstract

The invention relates to a novel sector target for evaluation of optical payload ground resolution. The novel sector target is of a fan shape with the total central angle of 155 degrees, the external radius of 50m and the internal radius of 2m, and is composed of small black and white fan shapes with small arc angles of 5 degrees; and the novel sector target is paved by natural gravel materials with good stability and excellent lambert performance. The novel sector target has the beneficial effects that the frequency of evaluation for the satellite loading ground resolution can be improved greatly, the target spectrum has good stability, the spectrum cannot be degraded rapidly due to the influences of rainwater and frost, and the loading performance evaluation precision can be effectively improved, the geometrical shape of the target is hardly influenced by rain, snow and frost, the target has good permeability and good self-cleaning capability, and the maintenance cost required by normalized operation can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of remote sensing, in particular to a novel fan-shaped target used for evaluating the ground resolution of optical loads. Background technique [0002] Remote sensing technology can obtain target electromagnetic radiation information in a large range and dynamically, and realize efficient cognition of the real physical attributes of ground objects. It has broad application prospects in resources, surveying and mapping, meteorology, and military reconnaissance. With the gradual development of earth observation and remote sensing technology in the direction of satisfying quantitative applications, regular and regular monitoring of the dynamic changes in the performance of satellite loads during operation, accurate detection of the degree of change, accurate discovery of the cause of the change and the formulation of targeted remedial measures have been recognized domestically. extensive attention. [0003] Si...

Claims

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Application Information

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IPC IPC(8): G01C25/00G01S7/497
CPCG01C25/00
Inventor 李传荣唐伶俐高彩霞马灵玲李晓辉王宁胡坚窦帅刘耀开李子扬张丹丹
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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