Impact and Implementation of Higher-Order Ionospheric Effects on Precise GNSS Applications
PBN-AR
Instytucja
Wydział Inżynierii Kształtowania Środowiska i Geodezji (Uniwersytet Przyrodniczy we Wrocławiu)
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
JOURNAL OF GEOPHYSICAL RESEARCH (40pkt w roku publikacji)
ISSN
0148-0227
EISSN
Wydawca
AMER GEOPHYSICAL UNION
DOI
URL
Rok publikacji
2017
Numer zeszytu
11
Strony od-do
9420–9436
Numer tomu
122
Link do pełnego tekstu
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Autorzy
Pozostali autorzy
+ 12
Słowa kluczowe
angielski
GNSS
Ionosphere
Orbits
PPP
RTK
Streszczenia
Język
angielski
Treść
High precision Global Navigation Satellite Systems (GNSS) positioning and time transfer require correcting signal delays, in particular higher-order ionospheric (I2+) terms. We present a consolidated model to correct second- and third-order terms, geometric bending and differential STEC bending effects in GNSS data. The model has been implemented in an online service correcting observations from submitted RINEX files for I2+ effects. We performed GNSS data processing with and without including I2+ corrections, in order to investigate the impact of I2+ corrections on GNSS products. We selected three time periods representing different ionospheric conditions. We used GPS and GLONASS observations from a global network and two regional networks in Poland and Brazil. We estimated satellite orbits, satellite clock corrections, Earth rotation parameters, troposphere delays, horizontal gradients, and receiver positions using global GNSS solution, Real-Time Kinematic (RTK), and Precise Point Positioning (PPP) techniques. The satellite-related products captured most of the impact of I2+ corrections, with the magnitude up to 2 cm for clock corrections, 1 cm for the along- and cross-track orbit components, and below 5 mm for the radial component. The impact of I2+ on troposphere products turned out to be insignificant in general. I2+ corrections had limited influence on the performance of ambiguity resolution and the reliability of RTK positioning. Finally, we found that I2+ corrections caused a systematic shift in the coordinate domain that was time- and region-dependent and reached up to −11 mm for the north component of the Brazilian stations during the most active ionospheric conditions.
Cechy publikacji
Research Article
Inne
System-identifier
PX-5a44cc2ad5de31c7ace2327c
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