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A method of extracting atmospheric density based on swarm-c satellite

An atmospheric density and satellite technology, applied in satellite radio beacon positioning systems, instruments, specific gravity measurement, etc., can solve problems such as insufficient dynamics

Active Publication Date: 2021-09-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
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Problems solved by technology

However, the dynamics of this method are insufficient, and the atmospheric density obtained is the average atmospheric density of the satellite in a certain period of time

Method used

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  • A method of extracting atmospheric density based on swarm-c satellite
  • A method of extracting atmospheric density based on swarm-c satellite
  • A method of extracting atmospheric density based on swarm-c satellite

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Embodiment

[0049] The purpose of the present invention is to measure the non-conservative acceleration of the satellite in orbit by using the on-board accelerometer of the satellite, and then calculate the atmospheric drag acceleration through the non-conservative acceleration to obtain the atmospheric density. Under the conditions that can be realized, the acceleration data correction is as accurate as possible, and the illumination radiation pressure model modeling is as perfect as possible, so that the calculated satellite atmospheric density will be more accurate. Therefore, the present invention provides a relatively accurate accelerometer calibration method, which adds the estimation of force and temperature parameters to the generalized least square method, removes the accelerometer error caused by temperature, and improves the accuracy of calibration results.

[0050] Below we combine figure 1 , a kind of atmospheric density extracting method based on SWARM-C satellite of the pre...

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Abstract

The invention discloses a method for extracting atmospheric density based on the SWARM-C satellite. The accelerometer data and the GPS track data of the SWARM-C satellite are obtained first, and then resampling and coordinate system conversion are performed on it; The spike signal and step signal; after the data is checked, the accelerometer data is corrected, and the deviation coefficient, proportional coefficient and temperature coefficient in the correction formula are estimated by the generalized least square method, and the corrected accelerometer data is obtained; then the satellite Model the radiation pressure of light received on its orbit, calculate the acceleration caused by the light radiation pressure, subtract the acceleration caused by the light radiation pressure from the corrected accelerometer data, and obtain the atmospheric drag acceleration; finally calculate the satellite in The product of the damping coefficient and the effective area of ​​its orbital operation is used to calculate the atmospheric density near the satellite orbit based on the product of the atmospheric drag acceleration and the product of the damping coefficient and the effective area.

Description

technical field [0001] The invention belongs to the technical field of aerospace and space climate, and more specifically relates to a method for extracting atmospheric density based on the SWARM-C satellite. Background technique [0002] The study of atmospheric density is of great significance, and it can be applied to precise orbit determination of different types of spacecraft or trajectory modeling of other flying objects in the universe. The precise orbit determination of a spacecraft needs to obtain the conservative force and non-conservative force it receives in space. The non-conservative force is mainly composed of atmospheric drag force and light radiation pressure, and the magnitude of atmospheric drag force is related to atmospheric density. Precise orbit determination and orbit prediction of satellites using atmospheric density can help low-orbit spacecraft extend their lifespan, help them return to orbit, analyze potential risks and send maneuver signals to sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N9/00G01S19/14G01S19/37
Inventor 杨波葛丽君闫新童刘珊曾庆川刘婷婷郑文锋
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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