Direct MSTID mitigation in precise GPS processing. Issue 3 (6th March 2017)

• Record Type: Journal Article
• Authors: Hernández‐Pajares, Manuel; Wielgosz, Pawel; Paziewski, Jacek; Krypiak‐Gregorczyk, Anna; Krukowska, Marta; Stepniak, Katarzyna; Kaplon, Jan; Hadas, Tomasz; Sosnica, Krzysztof; Bosy, Jaroslaw; Orus‐Perez, Raul; Monte‐Moreno, Enric; Yang, Heng; Garcia‐Rigo, Alberto; Olivares‐Pulido, Germán
• Is Part Of: Radio science. Volume 52:Issue 3(2017:Mar.)
• Page Start: 321
• Page End: 337
• Publication Date: 2017-03-06
• Subjects: medium‐scale traveling ionospheric disturbances -- Global Navigation Satellite Systems; Radio meteorology -- Periodicals; Radio wave propagation -- Periodicals; 621.38405
• DOI: 10.1002/2016RS006159
• Languages: English
• ISSNs: 0048-6604

Abstract

Abstract: In this paper, the authors summarize a simple and efficient approach developed to mitigate the problem in precise Global Navigation Satellite Systems (GNSS) positioning originated by the most frequent ionospheric wave signatures: the medium‐scale traveling ionospheric disturbances (MSTIDs). The direct GNSS Ionospheric Interferometry technique (hereinafter dGII), presented in this paper, is applied for correcting MSTID effects on precise Real Time Kinematic (RTK) and tropospheric determination. It consists of the evolution of the former climatic Differential Delay Mitigation Model for MSTIDs (DMTID), for real‐time conditions, using ionospheric data from a single permanent receiver only. The performance is demonstrated with networks of GNSS receivers in Poland, treated as users under real‐time conditions, during two representative days in winter and summer seasons (days 353 and 168 of year 2013). In range domain, dGII typically reduces the ionospheric delay error up to 10–90% of the value when the MSTID mitigation model is not applied. The main dGII impact on precise positioning is that we can obtain reliable RTK position faster. In particular, the ambiguity success rate parameter increases, from 74% to 83%, with respect to the original uncorrected observations. The average of time to first fix is shortened from 30 s to 13 s. The improvement in troposphere estimaton, due to any potential impact of the MSTID mitigation model, was most difficult to demonstrate. Key Points: Direct and simple MSTID mitigation technique (dGII) for GPS observations dGII is applicable to differential GPS processing (just one baseline is needed) Precise positioning is improved by means of dGII, in terms of ambiguity fixing and convergence time