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Method for measuring directional diagram of transmitting antenna of GNSS (Global Navigation Satellite System) satellite on satellite

An antenna pattern and satellite launch technology, applied in the GNSS remote sensing technology and application field, can solve the problems of deviation of GNSS satellite transmission antenna pattern, deviation of GNSS satellite transmission antenna pattern, inaccurate estimation, etc. The effect of fast speed and improved measurement accuracy

Pending Publication Date: 2022-08-05
NAT SPACE SCI CENT CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as the physical state of the earth's surface atmosphere changes (mainly including changes in temperature, humidity, and pressure), the attenuation degree of the earth's surface atmosphere to the power of the GNSS signal transmitted by the GNSS satellite changes accordingly, resulting in the attenuation of the GNSS ground station. The degree of estimation is inaccurate, which eventually leads to deviations in the measured GNSS satellite transmitting antenna pattern
[0006] In addition, when GNSS ground stations track GNSS signals for a long time, they often inevitably encounter intentional or unintentional radio frequency interference
With the change of radio frequency interference intensity and center frequency, the measured values ​​output by GNSS ground stations when tracking GNSS signals deteriorate to varying degrees, which eventually leads to deviations in the measured GNSS satellite transmitting antenna pattern

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  • Method for measuring directional diagram of transmitting antenna of GNSS (Global Navigation Satellite System) satellite on satellite
  • Method for measuring directional diagram of transmitting antenna of GNSS (Global Navigation Satellite System) satellite on satellite
  • Method for measuring directional diagram of transmitting antenna of GNSS (Global Navigation Satellite System) satellite on satellite

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Embodiment 1

[0053] like figure 1 As shown, Embodiment 1 of the present invention proposes an on-board method for determining a GNSS satellite transmit antenna pattern, and the specific implementation steps include:

[0054] Step S101) Obtaining the space position information of the spaceborne GNSS remote sensing detector

[0055] The positioning module of the spaceborne GNSS remote sensing detector realizes the precise positioning of the spaceborne GNSS remote sensing detector by processing the received GNSS direct signals, thereby obtaining the space coordinates (X) of the spaceborne GNSS remote sensing detector. r ,Y r ,Z r ). Among them, the subscript r represents the receiver, the spaceborne GNSS remote sensing detector. The space position vector of the spaceborne GNSS remote sensing detector is expressed as

[0056] Step S102) Obtain the spatial position information of GNSS satellites

[0057] The positioning module that comes with the spaceborne GNSS remote sensing detector ...

Embodiment 2

[0091] Embodiment 2 of the present invention proposes an on-board system for measuring GNSS satellite transmit antenna patterns, which is implemented based on the method of Embodiment 1. The system includes: a detector space position acquisition module, a satellite space position acquisition module, and a received power calculation module. module, EIRP calculation module and pattern calculation module; among them,

[0092] The detector space position acquisition module is used to acquire the space position information of the spaceborne GNSS remote sensing detector;

[0093] The satellite space position acquisition module is used to obtain the space position information of the GNSS satellite;

[0094]The received power calculation module is used to calculate the received power of the GNSS direct signal according to the coherent integral values ​​of the tracking channels I and Q of the spaceborne GNSS remote sensing detector;

[0095] The EIRP calculation module is used to calc...

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Abstract

The invention discloses a method for measuring a GNSS satellite transmitting antenna pattern on a satellite. The method comprises the following steps: step S101) acquiring spatial position information of a satellite-borne GNSS remote sensing detector; step S102), acquiring spatial position information of a GNSS satellite; step S103) according to the coherent integral values of the satellite-borne GNSS remote sensing detector tracking channels I and Q, calculating the receiving power of the GNSS direct signal; step S104) according to the results of the step S101) to the step S103), calculating the effective omnidirectional radiation power EIRP of the GNSS satellite transmitting antenna; and step S105) based on the GNSS satellite transmitting antenna EIRP, performing normalization operation to obtain a GNSS satellite transmitting antenna pattern. According to the method, the complexity of a satellite-borne GNSS remote sensing detector hardware system is not increased, the cost is low, and implementation is easy; and the measurement precision of the GNSS satellite transmitting antenna pattern can be obviously improved.

Description

technical field [0001] The invention relates to the field of GNSS remote sensing technology and application, in particular to an on-board method for measuring a GNSS satellite transmitting antenna pattern. Background technique [0002] GNSS remote sensing technology is a new type of ground remote sensing detection technology based on the Global Navigation Satellite System (GNSS). Among them, the use of GNSS reflected signals (GNSS-R) to detect the global sea surface wind field is one of the hotspots in the current GNSS remote sensing technology and application field. At present, the spaceborne GNSS remote sensing detector is the payload for GNSS remote sensing detection, which mainly includes a positioning module, an occultation detection module, and a GNSS-R detection module. [0003] GNSS-R technology mainly relies on the GNSS-R detection module that comes with the spaceborne GNSS remote sensing detector to obtain DDM data (dimensionless), and use it to invert the global ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/14G01S19/37
CPCG01S19/14G01S19/37Y02A90/10Y02D30/70
Inventor 仇通胜王先毅孙越强杜起飞白伟华蔡跃荣李伟王冬伟吴春俊刘成李福乔颢程双双张浩张璐璐王卓焱
Owner NAT SPACE SCI CENT CAS