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Określenie międzyczęstotliwościowych opóźnień sprzętowych ifcb z użyciem obserwacji glonass w eksperymencie lotniczym (Mielec’2011)

Krasuski K.

Zeszyty Naukowe / Wyższa Szkoła Oficerska Sił Powietrznych

2016

Nr 3

155--166

Autor artykułu przedstawia rezultaty badań dotyczących wyznaczenia opóźnień sprzętowych IFCB (Inter-Frequency Code Biases) dla obserwacji GLONASS. W obliczeniach wykorzystano kodowo-fazowe obserwacje GLONASS z odbiornika Topcon Hiper- Pro z eksperymentu lotniczego w Mielcu. Opóźnienia sprzętowe IFCB zostały wyznaczone z użyciem kombinacji liniowej „Geometry-Free” w programie SciTEC Toolbox 1.0.0. Do- datkowo w artykule zostały porównane wstępne rezultaty opóźnień sprzętowych IFCB z wartościami z CODE oraz GMV.

Article presents research results concerning determination of instrumental biases IFCB for GLONASS observations. The GLONASS code and phase observations from Topcon HiperPro receiver from airborne experiment in Mielec were utilized in the computations. The instrumental biases IFCB were obtained with the use of „Geometry-Free” linear combination in SciTEC Toolbox 1.0.0 software. Additionally, in the paper prelimi- nary results of instrumental biases IFCB were compared with CODE and GMV products.

Preliminary results of DCB C1-C2 in a GPS system

Krasuski K.

Measurement Automation Monitoring

2015

Vol. 61, No. 10

465--469

The paper present the results of studies related to estimation of instrumental biases C1-C2 in a GPS system. The data from LAMA and WROC reference stations in Poland were used in numerical processing, using the least squares method in SciTEC software. The Differential Code Biases C1-C2 were determined based on the Geometry Free linear combination with temporal resolution of 2 hours, separately for each station. The first results of the DCB C1-C2 were compared with theoretical values based on monthly CODE’s product. Moreover, the theoretical values of SDCB C1-C2 include many anomalies and the reference sum of SDCB C1-C2 is not equal to 0. The standard deviation of the mean difference between CODE and each station is about ±3 ns. The magnitude order of SDCB C1-C2 for each station for each day is less than ±10 ns with the standard deviation less than ±0.5 ns. The average values of SDCB C1-C2 for each station were determined based on a RINEX file from 6 measurements days. The SDCB C1-C2 from each station have got similar trends, except to the bias of SVN1, where the difference is more than 2 ns. Generally, the mean difference of SDCB C1-C2 between the LAMA and WROC solution is about ±1 ns. The RDCB C1-C2 are more stable than the SDCB C1-C2, with a daily repeatability about 0.7 ns. The characteristic of RDCB C1-C2 for each station over a few days is very irregular, with the range of about ±1.5 ns.