Method for calculating deviation of GEO satellite forwarded signal codes and carrier phases

A technology of carrier phase deviation and carrier phase, which is applied in the control field and can solve the problems of code and carrier phase consistency damage of navigation signals.

Inactive Publication Date: 2015-01-21
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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Problems solved by technology

The coherence of the code and carrier phase of the navigation signal transmitted from the ground is broken due to the effect of the uplink and the satellite transponder

Method used

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  • Method for calculating deviation of GEO satellite forwarded signal codes and carrier phases
  • Method for calculating deviation of GEO satellite forwarded signal codes and carrier phases
  • Method for calculating deviation of GEO satellite forwarded signal codes and carrier phases

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0023] A code and carrier phase consistency control method of a GEO satellite forwarding signal, the steps are as follows:

[0024] Step 1: Establish code and carrier phase macrocycle observation equations, including

[0025] Code phase macrocycle observation equation:

[0026] P loop = ρ u +E u +I up +T up +S p +ρ d +I dp +T dp +E d +m p +ε p (1)

[0027] Carrier phase macrocycle observation equation:

[0028] Φ loop = ρ u +E u +I uφ +T uφ +S p +S φ +ρ d +I dφ +T dφ +E d +m φ +ε φ (2)

[0029] where P loop and Φ loop Indicates the code and carrier phase pseudo-range of the signal from the baseband on the ground through the radio frequency transmission channel, space uplink, satellite forwarding, space downlink, radio frequency receivin...

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Abstract

The invention provides a method for calculating deviation of GEO satellite forwarded signal codes and carrier phases. The method includes the steps that firstly, a carrier large-loop code pseudo-range equation and a carrier phase pseudo-range equation are established, then, ionized layer parameters are calculated through observation results of double-frequency codes and the carrier phases, the offset of the code on the carrier C1 and the carrier phase and the offset of the code on the carrier C2 and the carrier phase are calculated respectively, and finally, the real-time control quantity of the codes on the carrier C1 and the carrier C2 and the carrier phases is acquired through filtering. According to the method, the GEO satellite forwarded signal codes and the carrier phases can be identical.

Description

technical field [0001] The invention relates to a control method, which can keep the phase of the signal code and the carrier wave at the outlet of the GEO satellite transponder consistent. Background technique [0002] In the 1980s, the United States built GPS, and the former Soviet Union built GLONASS (Global Navigation satellite system, GLONASS). Both have high-performance on-board atomic clocks placed on the stars, [0003] In the Chinese Area Positioning System (CAPS), the American WAAS system, and the European positioning network including GEO satellites, GEO satellites are used to transmit signals. The GEO satellite's working mode for signal forwarding is to use the transparent forwarding function of the satellite to forward the navigation signal generated on the ground to the user through the satellite, which has one more uplink than the general GPS navigation signal. The coherence of the code and carrier phase of the navigation signal transmitted from the ground i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00G01S19/30
Inventor 卢晓春荆文芳
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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