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Construction Method of Ionospheric Phase Scintillation Factor Based on GNSS 30s Sampling Frequency Data

A sampling frequency and phase scintillation technology, which is applied in satellite radio beacon positioning systems, radio wave measurement systems, instruments, etc., can solve problems such as difficult ionospheric scintillation astronomical disasters, and achieve the effect of wide practicability and cost reduction

Active Publication Date: 2021-09-24
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0005] Aiming at the above-mentioned technical problems, the present invention provides a method for monitoring ionospheric scintillation astronomical disasters, which introduces widely distributed low-sampling frequency geodetic receivers into the field of ionospheric scintillation monitoring, and solves the problem that it is difficult to completely monitor ionospheric scintillation astronomical disasters on a global scale. Technical Dilemmas of Disasters

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  • Construction Method of Ionospheric Phase Scintillation Factor Based on GNSS 30s Sampling Frequency Data
  • Construction Method of Ionospheric Phase Scintillation Factor Based on GNSS 30s Sampling Frequency Data

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Embodiment Construction

[0038] The present invention will be described in further detail below in conjunction with figure and specific implementation process:

[0039] like figure 1 As shown, the ionospheric phase scintillation factor construction method based on GNSS 30s sampling frequency data of the present invention, the steps are:

[0040] First, the geodetic trend separation is performed on the GNSS raw carrier phase observation data with a sampling frequency of 30s, and the geometric distance between the satellite and the station in the carrier phase is corrected, as well as the solid tide, antenna phase center, satellite clock error, phase winding and tropostatics Delay error; cycle slip detection and repair using wide-term HMW combination, geometric-free combination and ionosphere-free combination; precise single-point positioning PPP using carrier phase data without cycle slip effects, and combining random walk model estimation and correction Tropospheric wet delay; using the PPP and ionos...

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Abstract

The invention discloses an ionospheric phase scintillation factor construction method based on GNSS 30s sampling frequency data, which is suitable for monitoring ionospheric scintillation astronomical disasters. Firstly, the geodetic trend separation is performed on the GNSS original carrier phase observation data with a sampling frequency of 30s, and various errors in the carrier phase are corrected; cycle slip detection and repair are performed, and the tropospheric humidity is estimated and corrected by combining the precise point positioning PPP and the random walk model. Delay; Reversely optimize the characteristic frequency band interval of ionospheric scintillation and the symmetry parameter and time bandwidth product of Morse wavelet; use the skew analysis method to construct the scintillation factor constructed during the non-scintillation period and the phase scintillation factor provided by the ionospheric scintillation monitoring receiver The distribution function of the difference between them, and finally construct the empirical threshold of the flicker factor through the distribution function. The method is introduced into the field of ionospheric scintillation monitoring by the existing common geodetic receiver, greatly reduces the cost of ionospheric scintillation monitoring, and has wide practicability.

Description

technical field [0001] The invention relates to an ionospheric scintillation factor construction method, and is especially suitable for a construction method of an ionospheric phase scintillation factor based on GNSS 30s sampling frequency data used for monitoring ionospheric scintillation astronomical disasters. [0002] technical background [0003] Ionospheric scintillation is a kind of astronomical disaster that occurs frequently in the equatorial and polar regions. It is a major problem faced by space science in recent years, and it brings great challenges to the stability of GNSS system position, navigation and time services. The layer scintillation event caused the interruption of GNSS navigation satellite service, seriously disturbed the power, banking system and navigation safety of the Arctic route, and caused economic losses. It can be seen that ionospheric scintillation disasters pose a major threat to the sustainable development of human society. Scientific under...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/42G01S19/25
CPCG01S19/256G01S19/42
Inventor 赵东升李旺王潜心张克非
Owner CHINA UNIV OF MINING & TECH