Method for dividing agility satellite observation object strip based on pointing postures
A satellite observation and satellite technology, applied in measurement devices, image analysis, mapping and navigation, etc., can solve the problems of high computational complexity, insufficient strip segmentation accuracy, limited application in the field of satellite autonomous management technology, etc., to eliminate errors , the effect of low computational complexity
Active Publication Date: 2014-07-16
AEROSPACE DONGFANGHONG SATELLITE
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Problems solved by technology
[0005] The problem solved by the technology of the present invention is: to overcome the deficiencies of the prior art, and to meet the needs of agile satellite mission planning for the segmentation of observation targets, a method for segmenting stripes of agile satellite observation targets based on pointing attitude is provided, which solves the problems of the existing methods. Insufficient band segmentation accuracy, high computational complexity, and limited application in the field of satellite autonomous management technology
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Embodiment
[0130] Using the proposed strip division method for agile satellite observation targets, combined with the orbit prediction function and Area-Target function of STK software, the strip division results of an example of an irregular area are given.
[0131] The satellite high-precision orbit prediction module (HPOP) of STK is used to provide the orbit data used in the implementation method. The orbit of the embodiment adopts a sun-synchronous circular orbit, and the orbit parameters are set as follows:
[0132] Table 1 embodiment track parameters
[0133] parameter name
parameter value
track height
700km
98.1928°
ascending node right ascension
100.671°
true anomaly
0°
[0134] The imaging parameters used in the implementation examples are as follows:
[0135] Table 2 embodiment stripe division parameters
[0136] parameter name
parameter value
camera field of view
2° ...
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A method for dividing an agility satellite observation object strip based on pointing postures comprises the steps that firstly, a calculation equation of a posture pitch angle and a rolling angle is established, and the corresponding time tr and the rolling angle phi r produced when the observing pitch angle is 0 degree are calculated, wherein the posture pitch angle and the rolling angle are formed when a satellite on an appointed orbit points to to-be-observed object points; secondly, the corresponding tr and phi r of a plurality of vertexes forming an object area polygon are calculated in sequence according to the method, the maximum value and the minimum value of tr and the maximum value and the minimum value of phi r are found out, the section between the maximum phi r and the minimum phi r is divided through a satellite camera field angle to obtain a plurality of dividing lines; thirdly, the longitudinal and latitude coordinates of the four vertexes of a dividing strip and the longitude and latitude coordinates of the starting point and the stopping point of the middle line of the dividing strip are obtained through calculation according to the dividing lines, the maximum tr and the minimum tr. The method is high in calculation precision and low in complexity, the accuracy and calculation efficiency of satellite observation object strip dividing are improved, and the method can be achieved on a spaceborne computer with the limited calculation capability.
Description
technical field [0001] The invention belongs to the field of satellite ground task management and autonomous task management, and relates to optical remote sensing satellite observation task preprocessing technology. Aiming at the working mode of the push-broom imaging type agile optical remote sensing satellite, based on the calculation method of the satellite attitude when the camera points to the observation target, a method is proposed. An algorithm for dividing arbitrary shape observation targets into basic observation strips can be used in the design and implementation of agile optical satellite ground mission planning system and autonomous mission planning system. Background technique [0002] In the in-orbit application stage of remote sensing satellites, a large number of observation objects need to be imaged. Due to the high computational complexity of planning and scheduling of remote sensing satellites, the ground application departments of remote sensing satelli...
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IPC IPC(8): G06T7/00G01C11/00
Inventor 谢松于文进刘思远杨芳
Owner AEROSPACE DONGFANGHONG SATELLITE