Ionosphere phase scintillation factor construction method based on GNSS 30s sampling frequency data
A sampling frequency and phase scintillation technology, applied in satellite radio beacon positioning systems, radio wave measurement systems, measurement devices and other directions, can solve the problems of difficult ionospheric scintillation astronomical disasters, etc., and achieve the effect of wide practicability and cost reduction
Active Publication Date: 2021-06-25
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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[0038] The present invention will be described in further detail below in conjunction with figure and specific implementation process:
[0039] Such as 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 io...
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The invention discloses an ionosphere phase scintillation factor construction method based on GNSS 30s sampling frequency data. The method is suitable for monitoring ionosphere scintillation astronomical disasters. The method comprises the following steps of: firstly, carrying out geodetic survey trend separation on GNSS original carrier phase observation data with 30s sampling frequency, and correcting various errors in a carrier phase; performing cycle slip detection and repair, and estimating and correcting troposphere moisture delay through PPP (Precision Point Positioning) and a random walk model; reversely optimizing the characteristic frequency band interval of ionospheric scintillation and the symmetric parameter and time bandwidth product of the Morse wavelet; and utilizing a skew analysis method to construct a distribution function of a difference value between a scintillation factor constructed in a scintillation-free time period and a phase scintillation factor provided by an ionospheric scintillation monitoring receiver, and finally constructing an empirical threshold of the scintillation factor through the distribution function. The method is introduced into the field of ionospheric scintillation monitoring of an existing common geodesic receiver, the cost of ionospheric scintillation monitoring is greatly reduced, and the method 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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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