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A spaceborne real-time occultation prediction method

A space-borne and navigation star technology, applied in satellite radio beacon positioning systems, instruments, measuring devices, etc., can solve the problems of not considering visibility and real-time performance, insufficient accuracy, wasting hardware resources, etc.

Active Publication Date: 2021-05-18
天津讯联科技有限公司 +1
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AI Technical Summary

Problems solved by technology

[0004] The existing occultation prediction algorithm is mainly calculated by using simulation software, and then placed in the device in advance, without considering the visibility and real-time performance in practical applications, so the accuracy rate is insufficient, resulting in a waste of hardware resources

Method used

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  • A spaceborne real-time occultation prediction method
  • A spaceborne real-time occultation prediction method
  • A spaceborne real-time occultation prediction method

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Embodiment

[0116]Simulation scene such asFigure 4 The design, satellite design orbit height 400km, the track tilt angle design is 55 degrees, the gesture design is the orientation of the ground, the three axis stable, the UTC time is set to August 5, 2017 4:00:00 to August 6, 2017 4:00:00, the navigation constellation takes the GPS constellation as an example, star number selection PRN1, spacecraft receiving the antenna angle W is 40 degrees, the antenna installation pitch angle is -20, the mask cut angle is -30, the antenna pitch door The limit is [-22,0], since the scene design is three-axis stable, the antenna and the direction of motion are retained, so the antenna azimuth door limit is [-20, 20], if the antenna is attitudeless, it is necessary to introduce the inertial equipment, Plus antenna orientation caused by attitude machine. Take time 60s as a step, the entire day PRN1 GPS satellite mask is calculated by the present invention, as shown in the following table:

[0117]

[0118]Through sem...

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Abstract

The invention discloses a space-borne real-time occultation prediction method, which comprises first obtaining the position velocity of the spacecraft according to the positioning equipment of the occultation detector, and calculating the orbital parameters of the spacecraft; and then calculating the orbital parameters of the spacecraft and all navigation stars after 10s position, and calculate the pitch angle, azimuth angle, tangent point height and antenna azimuth angle of all navigation stars, and judge whether the obtained pitch angle Elv, tangent point height Hight and antenna azimuth angle meet the threshold of occultation events, if satisfied , then extrapolate the time for 30s and 1min, and repeat the above calculation and judgment process respectively. If all are satisfied, it is determined that the navigation star is an occultation. The present invention judges occultation events by adopting continuous arc segments by inertial navigation equipment, thereby enhancing the accuracy of forecast results, the method is simple and easy, and has important application value for real-time forecast.

Description

Technical field[0001]The present invention relates to the field of atmospheric mask detection techniques, and specifically, a star-loaded real-time mask prediction method, using a star-loaded atmospheric mask detection equipment and initializing hardware equipment, early forecasting mask events occur, providing initial settings for fast capture mask events Condition method.Background technique[0002]The success of GPS / MET experiments verified that GNSS radio mask technology had a significant value for Earth's atmospheric detection. With the development of GNSS radio mask technology, the mask technology is increasingly valued. Masking Event refers to the phenomenon of bending physical changes in the ionizing layer and atmosphere of the GNSS satellite. Mask Technology refers to the mask, the mask signal is captured and tracked by the mask receiver, thereby inversion of some of the parameters of the signal propagation path by analyzing the acquired observations.[0003]The relative velo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/42G01S19/47G01S19/08
CPCG01S19/08G01S19/42G01S19/47
Inventor 温凯刘永成张春泽李昌兴杨荣康郭启云
Owner 天津讯联科技有限公司
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