Automatic sunshine avoiding method for space to ground observation apparatus

A technology of earth observation and instruments, applied in the direction of instruments, aircraft, motor vehicles, etc., can solve the problems of complexity and poor timeliness of ground intervention to avoid the sun, and achieve strong real-time performance, save personnel and costs, and improve safety Effect

Active Publication Date: 2017-06-27
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In order to solve the shortcomings of the complexity and poor timeliness of the ground intervention sun avoidance method

Method used

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  • Automatic sunshine avoiding method for space to ground observation apparatus
  • Automatic sunshine avoiding method for space to ground observation apparatus
  • Automatic sunshine avoiding method for space to ground observation apparatus

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Embodiment Construction

[0040] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention should not be limited thereto.

[0041] Principle of the present invention is: as figure 1 Shown, the space earth observation involved in the present invention, O C -X C Y C Z C is the instrument coordinate system, O S -X S Y S Z S is the satellite coordinate system, O O -X O Y O Z O is the orbital coordinate system. All three are Cartesian coordinate systems, and there is no position restriction between them. figure 1 Optical axis of instrument 1 along O C Z C Axis direction, instrument 1 around O C Y C axis is rotated so that the O S x S The reciprocating scanning observation is carried out in the axial direction. The direction of the 130° field of view can always contain the sun vector, and the key to whether the sunlight can enter the field of view of the instrument is the angle b...

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Abstract

The invention relates to an automatic sunshine avoiding method for a space to ground observation apparatus, belongs to the space weather monitoring technology field and solves problems of complexity and poor timeliness existing in a ground intervention sunshine avoiding method in the prior art. The method comprises steps that a sun vector of a track coordinate system is converted to a sun vector S2 of an apparatus coordinate system through a conversion matrix T1 from the track coordinate system to a satellite coordinate system and a calibration conversion matrix T2 from the satellite coordinate system to the apparatus coordinate system, an included angle alpha=asin(s2x) of the sun vector S2 and a YcZc surface of the apparatus coordinate system is calculated, an included angle of the YcZc surface and an apparatus optical axis is made to be beta, an included angle of sunlight and the apparatus optical axis on an XcZc surface is gamma=alpha-beta(south pole) or gamma=beta-alpha(north pole), according to sunshine avoiding determination conditions, whether sunshine avoiding is needed is determined, if yes, an apparatus is controlled for rotation in an opposite direction, if not, the apparatus rotates in an original direction. The sunshine avoiding method is advantaged in that system safety is effectively improved, automatic in-orbit measurement is carried out, and the method further has properties of strong timeliness, low cost and easy realization.

Description

technical field [0001] The invention belongs to the technical field of space weather monitoring, and in particular relates to an automatic sun-avoiding method for a space-to-earth observation instrument, and is especially suitable for automatically avoiding sunlight from entering the detection field of view of the instrument in space-to-earth observation. Background technique [0002] The aurora is mainly caused by the solar wind and high-energy charged particles in the earth's magnetosphere injected into high-latitude regions along the earth's magnetic field lines, and ionizes and excites high-level atmospheric molecules or atoms. The two-pole area is generally an area greater than 60° of magnetic latitude. [0003] When the instrument is on the polar sun-synchronous orbit at an altitude of 830km to scan and observe the aurora at the north and south poles of the earth, since the instantaneous field of view of the instrument reaches 130°×10° (10° is along the orbit direction...

Claims

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Application Information

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IPC IPC(8): G05D1/08G01C21/20G01W1/00
CPCB64G1/244G01C21/20G01W1/00
Inventor 何飞宋克非陈波
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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