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A method for obtaining the occlusion probability of a data transmission antenna when a satellite is in orbit for actual transmission

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

Active Publication Date: 2018-03-09
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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  • A method for obtaining the occlusion probability of a data transmission antenna when a satellite is in orbit for actual transmission

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Embodiment example

[0180] Suppose the simulation conditions are as follows:

[0181] ●Satellite operating at 600km orbit height

[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 of the digital antenna without obstruction

[0184] In this case, the maximum roll angle of the satellite and the maximum rotation angle of the digital antenna without obstruction are set as:

[0185] The maximum roll angle of the satellite: 35°

[0186] The maximum turning angle of the data transmission antenna without obstruction: 90°

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

[0188] 2) Calculate the satellite's ground opening angle and the maximum roll angle at which the digital antenna will not be blocked

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Abstract

The present invention is a method for obtaining the occlusion probability of the digital transmission antenna when the satellite is on-orbit for actual transmission. First, the ground angle of the satellite and the maximum side swing angle of the digital transmission antenna will not be occluded by calculation; then, the STK simulation scene is established , to draw the area where the data transmission antenna may be blocked; secondly, using the area ratio and angle ratio, the blocking probability is calculated; finally, according to the calculation results, the formulation of the digital transmission antenna blocking probability index is given. The present invention proposes a brand-new idea for analyzing the occlusion probability of digital transmission antennas, creates the concepts of area ratio and angle ratio, and provides a method for calculating the occlusion probability of digital transmission antennas by using the area ratio and angle ratio, combined with the powerful STK The two-dimensional and three-dimensional display function uses a very small amount of calculation to realize the analysis of the occlusion probability of the digital transmission antenna, which is helpful for satellite users and satellite developers to evaluate and assess the satellite’s in-orbit work efficiency. For satellite users and satellite developers The development of relevant indicators provides an important basis.

Description

Technical field [0001] The invention belongs to the field of spacecraft mission planning, and specifically relates to a method for obtaining the blocking probability of a digital antenna when a satellite is in orbit for actual transmission. Background technique [0002] Remote sensing satellites, especially high-resolution earth observation optical remote sensing satellites, will produce a large amount of image data during their work. However, due to restrictions on the size, quality, and power consumption of the satellite, the capacity of the solid-state memory (referred to as fixed memory) used to store data on the satellite is strictly limited. Therefore, the real-time imaging mode that uses the camera to perform imaging and the ground-to-earth digital antenna (hereinafter referred to as the digital antenna) while back-transmitting to the ground station is receiving attention. In order to ensure sufficient return rate and transmission gain, the digital transmission antenna is...

Claims

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Application Information

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Patent Type & Authority Patents(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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