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Moon-tracking segment ultraviolet sensor earth and moon photography time predication method

A time prediction and sensor technology, applied in astronomical navigation, integrated navigator and other directions, can solve the problems of unspecified shooting arcs, the selection method of the best shooting time, etc., to achieve high imaging conditions and scientific engineering value, simple calculation Effect

Active Publication Date: 2008-08-06
BEIJING INST OF CONTROL ENG
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Problems solved by technology

[0007] A elfving, L Stagnearo, A Winton, SMART-1: Key technologies and autonomy implementations.Acta Astronautic 52 (2003) introduced the situation of the camera used to shoot the moon during the lunar flight, but it did not explain the shooting arc and the best shooting time selection method

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  • Moon-tracking segment ultraviolet sensor earth and moon photography time predication method
  • Moon-tracking segment ultraviolet sensor earth and moon photography time predication method
  • Moon-tracking segment ultraviolet sensor earth and moon photography time predication method

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Embodiment Construction

[0044] The ultraviolet sensor involved in the present invention can be a three-axis attitude sensor using the ultraviolet spectrum disclosed in the patent No. US5837894 titled "Wide Field of View Sensor with diffractive Optical Corrector" applied by Honeywell Company. A three-axis attitude sensor using the ultraviolet spectrum disclosed in the title "Method for determining 3-axis spacecraft attitude" of US Patent No. 5,319,969 may also be used.

[0045] The following takes the photo of the moon as an example to describe in detail.

[0046] As shown in FIG. 1 , it is a flow chart of the method of the present invention, and the implementation process of the method will be introduced in detail below.

[0047](1) Perform illumination analysis according to the nominal orbit (X, Y, Z), the sun vector and the moon center vector in the satellite system, and select the orbital arc segment that meets the illumination conditions of the Earth / Moon;

[0048] The illumination analysis proc...

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Abstract

The invention discloses a time prediction method for earth-moon picture shooting by an ultraviolet sensor at cislunar fight, which comprises steps of (1) selecting an orbit arc meeting the light condition for earth-moon shooting, (2) selecting an orbit arc, in which earth-moon appears, within viewing field area of the ultraviolet sensor, (3) taking the orbit position simultaneously meeting the step (1) and the step (2) as a selectable orbit for shooting, inputting an orbit prediction position corresponding to the selectable orbit, attitude matrix at a certain time before the selectable orbit, sun-moon-earth ephemeredes and a satellite attitude motion model after launching the satellite and before the coming of the selectable orbit, calculating the attitude matrix and a selenocentric / geocentric vector within the prediction time period and making a curve, changing along the time, of an included angle of the selenocentric / geocentric vector and a viewing field central vector, then obtaining continuous visible time range(t1-t2) of earth / moon by the curve and the size of the viewing field of the ultraviolet sensor and calculating the best time according to the obtained continuous visible time range.

Description

technical field [0001] The invention relates to a method for predicting the time of taking pictures of the earth and the moon by using an ultraviolet sensor in the section of flying to the moon, which belongs to the field of optical imaging attitude sensors. Background technique [0002] With the rapid advancement of imaging detection devices and processor technology, spacecraft attitude sensors are gradually developing from unit scanning to imaging. The ultraviolet sensor is a large field of view imaging attitude sensor that is different from traditional horizons. [0003] The ultraviolet sensor has the ability to obtain ultraviolet earth and ultraviolet moon images during the lunar flight, which is not only of great value in scientific data, but also has great value for the realization of autonomous navigation by using the acquired earth-moon image information and cooperating with inertial attitude. [0004] First of all, the UV sensor has a special combined field of view ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/24G01C21/02
Inventor 王立叶培健李铁寿宗红
Owner BEIJING INST OF CONTROL ENG
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