Method for acquiring data transmission antenna shielding probability of satellite during in-orbit real-time transmission

A data transmission antenna and satellite technology, which is applied in the field of obtaining the occlusion probability of the data transmission antenna when the satellite is in orbit for actual transmission, can solve the problem of high occlusion probability, and achieve the effects of good general applicability, accurate description and small amount of calculation.

Active Publication Date: 2015-12-23
AEROSPACE DONGFANGHONG SATELLITE
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Problems solved by technology

As a result, the occlusion probability analyzed is often very high, which is obviously inconsistent with the actual situation in orbit

Method used

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  • Method for acquiring data transmission antenna shielding probability of satellite during in-orbit real-time transmission

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Embodiment example

[0180] Assume that the simulation conditions are as follows:

[0181] ●The satellite operates at an orbital height of 600km

[0182] According to the method of the present invention, the calculation process is as follows:

[0183] 1) Obtain the maximum roll angle of the satellite and the maximum rotation angle when the data transmission antenna is not blocked

[0184] In this implementation case, the maximum roll angle of the satellite and the maximum rotation angle under the condition that the data transmission antenna is not blocked are respectively set as:

[0185] Satellite maximum roll angle: 35°

[0186] The maximum rotation angle of the digital antenna without being blocked: 90°

[0187] The above parameters are assumed values ​​based on the engineering design experience of previous models. In the actual design, the two parameters should take the actual data that has been strictly demonstrated and designed.

[0188] 2) Calculate the angle of the satellite to the gr...

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Abstract

The present invention relates to a method for acquiring a data transmission antenna shielding probability of a satellite during in-orbit real-time transmission. The method comprises the steps: firstly, calculating to obtain a ground flare angle of the satellite and a maximum side swing angle when a data transmission antenna is not shielded; secondly, establishing an STK simulation scene and drawing an area where the data transmission antenna can be shielded; thirdly, calculating a shielding probability by using an area ratio and an angle ratio; and finally, providing a formulation of a data transmission antenna shielding probability index according to the calculation result. According to the method provided by the present invention, a brand-new idea for analyzing the data transmission antenna shielding probability is provided, a new concept of area ratios and angle ratios is created, a method for calculating the data transmission antenna shielding probability by using the area ratios and the angle ratios is provided, the powerful two-dimensional and three-dimensional display functions of STK are combined together, and a very small amount of calculation is used for realizing analysis of the data transmission antenna shielding probability, so that the method is helpful for satellite users and satellite developers to evaluate and check the in-orbit working efficiency of a satellite, and provides an important basis for the satellite users and the satellite developers to formulate related indexes.

Description

technical field [0001] The invention belongs to the field of spacecraft mission planning, and in particular relates to a method for obtaining the occlusion probability of a data transmission antenna when a satellite performs actual transmission in orbit. Background technique [0002] Remote sensing satellites, especially high-resolution optical remote sensing satellites for earth observation, will generate a large amount of image data during their operation. However, subject to the constraints of satellite volume, quality, power consumption, etc., the capacity of the solid-state memory (solid memory for short) used to store data on the satellite is strictly limited. Therefore, the real transmission imaging mode of using the camera to image on one side and the ground data transmission antenna (hereinafter referred to as the digital transmission antenna) to transmit back to the ground station at the same time has been paid attention to. In order to ensure sufficient return ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 阎诚李琳琳赵健李志壮
Owner AEROSPACE DONGFANGHONG SATELLITE
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