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The Automatic Avoidance Method of Space Earth Observation Instrument

A technology for earth observation and instruments, applied to instruments, aircraft, motor vehicles, etc., can solve the problems of complexity and poor timeliness of ground intervention to avoid the sun, and achieve the effects of strong real-time performance, improved safety, and easy implementation

Active Publication Date: 2019-05-24
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of the complexity and poor timeliness of the ground intervention sun avoidance method in the prior art, the present invention provides an automatic sun avoidance method for a space-to-earth observation instrument

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  • The Automatic Avoidance Method of Space Earth Observation Instrument
  • The Automatic Avoidance Method of Space Earth Observation Instrument
  • The Automatic Avoidance Method of Space Earth Observation Instrument

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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 sun-avoiding method for a space-to-earth observation instrument, belonging to the technical field of space weather monitoring. The disadvantages of the complexity and poor timeliness of the ground intervention sun avoidance method in the prior art are solved. The method for avoiding the sun of the present invention first passes through the conversion matrix T from the orbital coordinate system to the satellite coordinate system 1 and the calibration transformation matrix T from the satellite coordinate system to the instrument coordinate system 2 Convert the sun vector in the orbital coordinate system to the sun vector S in the instrument coordinate system 2 , and then calculate the sun vector S 2 The included angle with the YcZc plane of the instrument coordinate system α=asin(s 2x ), so that the angle between the optical axis of the instrument and the YcZc plane is β, then the angle between the sun’s rays and the optical axis of the instrument in the XcZc plane is γ=α‑β (South Pole), or γ=β‑α (North Pole), and then according to Judgment conditions for shading the sun, determine whether it is necessary to shading the sun at present, if necessary, control the instrument to rotate in the opposite direction, if not, the instrument will rotate in the original direction. The sun avoidance method effectively improves the security of the system, and the on-orbit automatic measurement has strong real-time performance, 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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Patent Type & Authority Patents(China)
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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