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Low earth orbit satellite broadcast ephemeris parameter expression method

A technology for broadcasting ephemeris and low-orbit satellites, which is applied in the field of orbit parameter expression of navigation satellites, and can solve problems such as inapplicability to low-orbit satellites.

Active Publication Date: 2018-12-14
BEIJING FUTURE NAVIGATION TECH CO LTD
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Problems solved by technology

However, the existing traditional navigation satellite broadcast ephemeris has a large representation error for low-orbit satellite orbits, and is not suitable for low-orbit satellites

Method used

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  • Low earth orbit satellite broadcast ephemeris parameter expression method
  • Low earth orbit satellite broadcast ephemeris parameter expression method
  • Low earth orbit satellite broadcast ephemeris parameter expression method

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Embodiment Construction

[0024] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure, and to fully convey the scope of the present disclosure to those skilled in the art.

[0025] Such as figure 1 As shown, the low-orbit satellite broadcast ephemeris parameter expression method of an embodiment of the present invention comprises the following steps:

[0026] Step S1, based on the precision orbit of the low-orbit satellite, the broadcast ephemeris parameter fitting is carried out. The broadcast ephemeris parameter adopts the expression method compatible with the navigation satellite broadcast ephemeri...

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Abstract

The invention discloses a low earth orbit satellite broadcast ephemeris parameter expression method. The method comprises the steps that 1, broadcast ephemeris parameter fitting is performed based ona precise orbit of a low earth orbit satellite, wherein the expression method compatible with a navigation satellite broadcast ephemeris is adopted for broadcast ephemeris parameters, and satellite orbit semi-major axis variability, average motion angular velocity variability, latitude argument one-third circumferential sine and a cosine harmonic correction coefficient are added on the basis of original parameters to absorb periodic perturbation of the low earth orbit satellite orbit; and 2, reserved positions in a navigation message format of a navigation satellite are adopted to express theorbit semi-major axis variability, the average motion angular velocity variability, the latitude argument one-third circumferential sine and the cosine harmonic correction coefficient. According to the method, an existing medium and high earth orbit navigation satellite ephemeris design and expression method is fully utilized, parameter compatibility and expression mode unification of a low earthorbit satellite ephemeris and a medium and high earth orbit satellite navigation ephemeris are realized, and the complexity of comprehensive usage of the medium and high earth orbit navigation satellite ephemeris and the low earth orbit satellite ephemeris by a user is lowered.

Description

technical field [0001] The invention relates to a technique for expressing orbital parameters of navigation satellites, in particular to a method for expressing parameters of low-orbit satellite broadcast ephemeris. Background technique [0002] When the navigation satellite is used for navigation and positioning, the instantaneous position and velocity of the navigation satellite must be calculated first. The position and speed of the satellite on the orbit are represented by the ephemeris. The satellite provides users with services such as real-time positioning and precise navigation by publishing the ephemeris parameters. The user calculates the satellite position and speed according to the fixed formula according to the provided parameters, which is called navigation. Ephemeris. [0003] Navigation ephemeris is a group of binary codes broadcast by navigation satellites to users, including system time, ephemeris, satellite clock correction parameters, navigation satellit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/02
CPCG01S19/02
Inventor 穆旭成
Owner BEIJING FUTURE NAVIGATION TECH CO LTD
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