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A Constellation Ephemeris On-orbit Update Method

An update method and ephemeris technology, applied in the aerospace field, can solve the problems of requiring regular update, low ephemeris accuracy, large data volume, etc., to achieve low overhead, reduce transmission bandwidth, and solve the effect of high occupied bandwidth

Active Publication Date: 2021-12-10
SHANGHAI SPACECOM SATELLITE TECH LTD
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Problems solved by technology

The multi-point ephemeris data on the ground has the problems of low ephemeris accuracy, regular update, and large amount of data in a single injection; the GNSS positioning extrapolation broadcast method is mainly used for short-term orbit extrapolation, and the extrapolation within the subsequent time period Each trajectory point has the disadvantages of large amount of calculation and high bandwidth for broadcasting

Method used

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  • A Constellation Ephemeris On-orbit Update Method
  • A Constellation Ephemeris On-orbit Update Method

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Embodiment Construction

[0016] In the following description, the present invention is described with reference to various examples. One skilled in the art will recognize, however, that the various embodiments may be practiced without one or more of the specific details, or with other alternative and / or additional methods, materials, or components. In other instances, well-known structures, materials, or operations are not shown or described in detail so as not to obscure the inventive concepts of the present invention. Similarly, for purposes of explanation, specific quantities, materials and configurations are set forth in order to provide a thorough understanding of embodiments of the invention. However, the invention is not limited to these specific details. Furthermore, it should be understood that the embodiments shown in the drawings are illustrative representations and are not necessarily drawn to correct scale.

[0017] In this specification, reference to "one embodiment" or "the embodiment...

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Abstract

The invention discloses a constellation ephemeris on-orbit update method. Firstly, it is judged whether the satellite is a satellite newly added to the network, and if so, the extrapolated multi-point ephemeris data within the time T0~T0+2T is updated, and the GNSS positioning is normal. After that, update the real-time broadcast two-point ephemeris at T0 and T0+T moments, where T0 is the current moment, and T is the ephemeris extrapolation time requirement; then, use the sliding update method to update T0 and T0+T moments at the same time every second broadcast two-point ephemeris data in real time; and update the extrapolated multi-point ephemeris data in subsequent 2T time intervals as a backup every specified time interval.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to an on-orbit update method for constellation ephemeris. Background technique [0002] With the continuous improvement of space navigation, remote sensing, communication and other business needs, satellites such as navigation enhancement, ground communication services, and earth observation are all showing a development trend of massive constellation networking, especially represented by Starlink constellation and OneWeb constellation. [0003] Constellation satellites need to perform inter-satellite antenna pointing control based on satellite ephemeris, therefore, ephemeris update is the basis of on-orbit operation control. In addition, for inter-satellite coordinated mission satellites, it is necessary to carry out coordinated mission planning based on the coordinated satellite ephemeris. At present, the traditional ephemeris update method is to inject multi-point ephemeris d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/25G01S19/27
CPCG01S19/258G01S19/27
Inventor 封家鹏包海超胡海鹰张晟宇裴文良孙杰
Owner SHANGHAI SPACECOM SATELLITE TECH LTD
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