A construction method of ionospheric phase scintillation factors in Arctic region based on GNSS

Abstract

The invention discloses a GNSS-based north pole region ionized layer phase scintillation factor construction method, which is used for monitoring astronomical disasters in a north pole region. The method comprises the following steps: firstly, selecting an original GNSS phase observation value in the north pole region; correcting a satellite clock, a receiver phase center, relativity, phase wrapping, troposphere delay and a solid tide error through a model method, and further eliminating a receiver clock error and troposphere wet delay which cannot be corrected by the model through a precise single-point positioning method; using the discrete wavelet transform technology to reduce the noise of the signal and reduce the extraction of the noise on an ionospheric scintillation signal; performing time-frequency analysis on the signal by using a continuous wavelet transform technology, extracting an empirical signal frequency band range, and extracting the ionospheric scintillation signal;and setting a translation window, and obtaining a standard deviation of the ionospheric scintillation signal in the window to complete ionospheric phase scintillation factor construction. The method has the advantages of simple steps, low detection cost and wide practicability.

Description

technical field [0001] The invention relates to a method for constructing an ionospheric scintillation factor, and is especially suitable for a GNSS-based method for constructing an ionospheric phase scintillation factor in the Arctic region, and is used for monitoring, modeling and forecasting of astronomical disasters with low ionospheric scintillation in the Arctic region. [0002] technical background [0003] Ionospheric scintillation is a frequent astronomical disaster in the Arctic region. 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 (PNT) services. For example, Halloween in 2003 Ionospheric scintillation events caused GNSS navigation satellites to interrupt services, seriously disrupting power, banking systems, and navigation safety on Arctic routes, causing economic losses. It can be seen that ionospheric scintillation disasters pose a major threat to the sus...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above technical problems, a GNSS-based construction method of the ionospheric phase scintillation factor in the Arctic region is provided, which can give the scintillation factor on each frequency of GNSS, and use the ionospheric phase scintillation factor to convert the widely distributed but low sampling frequency The introduction of terrain-type receivers into the field of ionospheric scintillation monitoring in the Arctic region can solve the problem of incomplete monitoring of ionospheric scintillation astronomical disasters in the Arctic region caused by insufficient distribution of ionospheric scintillation receivers in the Arctic region

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