Ionized layer scintillation factor extraction method based on DORIS double-frequency observation

By preprocessing and amplitude correction of DORIS carrier phase observations, combined with Kriging interpolation and support vector regression methods, the problem of blind spots in ground-based GNSS network monitoring was solved, enabling reliable characterization of small-scale irregular body disturbances in the ionosphere and global ionospheric scintillation monitoring.

CN122283758APending Publication Date: 2026-06-26CHINA UNIV OF MINING & TECH
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Patent Information

Application Number
CN202610433852.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-03
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

In existing technologies, ground-based GNSS networks have monitoring blind spots in areas such as the ocean, making it difficult to build a globally covered, high-precision ionospheric scintillation monitoring network. Furthermore, there is a lack of systematic research on the inversion of DORIS data regarding the rapid disturbance characteristics caused by small-scale irregularities and the ionospheric scintillation factor.

Method used

By eliminating the cutoff elevation angle and detecting cycle slips in the DORIS carrier phase observations, the ionospheric puncture point (IPP) is calculated, the RODTI is constructed and its amplitude is corrected. The GPS ROTI two-dimensional grid background field is generated using Kriging interpolation and support vector regression methods, thus achieving spatiotemporal matching and amplitude correction between RODTI and ROTI.

Benefits of technology

It improves the availability and stability of carrier phase observation data, enhances the response capability to rapid ionospheric disturbances, expands the application scope of the DORIS system in the field of ionospheric scintillation monitoring, and provides a new data source for building a more refined global ionospheric scintillation monitoring network.

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Abstract

The invention discloses an ionospheric scintillation factor extraction method based on DORIS double-frequency observation, and belongs to the technical field of space weather monitoring and satellite navigation. A cycle slip detection and low elevation angle control method suitable for a DORIS system is constructed, an ionized layer total electron content change rate factor RODTI is extracted, GPS observation data of an IGS observation station is utilized to construct an ROTI two-dimensional grid background field, and space-time matching of the DORIS and a GPS flicker factor is completed; a support vector regression method considering latitude constraint is further introduced, normalization correction is carried out on the RODTI amplitude, the problem that the flicker factor amplitudes among different observation systems are inconsistent is solved, more accurate RODTI with the amplitude consistent with ROTI is obtained, and therefore the complete ionospheric flicker factor extraction method for DORIS double-frequency observation is formed. The method can reliably reflect the spatial and temporal distribution characteristics of ionospheric scintillation on the global scale, provides a new data source for constructing a multi-source ionospheric scintillation dense monitoring network covering the ocean, the polar region and other regions, and has wide practicability.
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