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Constellation ephemeris on-orbit updating method

An update method and ephemeris technology, which is applied in the aerospace field, can solve the problems of regular update, low ephemeris accuracy, and large amount of calculation, so as to achieve low overhead, reduce transmission bandwidth, and solve the effects of high bandwidth occupation

Active Publication Date: 2021-06-18
SHANGHAI SPACECOM SATELLITE TECH LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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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 updating method, which comprises the following steps: firstly, judging whether a satellite is a satellite newly added into a network, if so, updating extrapolation multipoint ephemeris data within the time of T0 to T0 + 2T, and after GNSS positioning is normal, updating real-time broadcast two-point ephemeris at the time of T0 and T0 + T, where T0 is the current time and T is ephemeris extrapolation time demand; then, using a sliding updating method, and updating the ephemeris data of the two real-time broadcast points at the T0 moment and the T0 + T moment at the same time per second; and updating the extrapolated multipoint ephemeris data in the subsequent 2T moment for standby application 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 Applications(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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