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Estimation of Differential Code Bias and Local Ionospheric Mapping Using GPS Observations
2021Dual frequency GPS receiver provides measurements at two frequencies, one at L1: 1575.42 MHz another at L2: 1227.60 MHz, over worldwide. Measurements of any GPS receiver are affected by instrument biases of satellite and receiver. Differential Code Bias (DCB) is the instrumental biases between two GNSS code observations at same or different frequencies.
Yogesh Lingwal +2 more
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Differential code bias estimation based on uncombined PPP with LEO onboard GPS observations
Advances in Space Research, 2020Abstract Differential Code Bias (DCB) is an essential correction that must be provided to the Global Navigation Satellite System (GNSS) users for precise position determination. With the continuous deployment of Low Earth Orbit (LEO) satellites, DCB estimation using observations from GNSS receivers onboard the LEO satellites is drawing increasing ...
Peiyuan Zhou +5 more
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Evaluation of Phase Coding to Mitigate Differential Reflectivity Bias in Polarimetric PAR
IEEE Transactions on Geoscience and Remote Sensing, 2016One of the main challenges to the use of phased array radar for weather observations is the implementation of dual polarization with acceptable levels of cross-polar fields induced by the antenna. For example, to achieve acceptable differential reflectivity $(Z_\mathrm{DR})$ bias (i.e., less than 0.1 dB) using simultaneous transmission and ...
Igor R. Ivic, Richard J. Doviak
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Estimation and analysis of BDS-3 multi-frequency differential code bias using MGEX observations
Journal of Global Positioning Systems, 2022Differential code bias (DCB) significantly affects the ionosphere modeling, precise positioning, and navigation applications when using code observations. With the fully completed BeiDou navigation satellite system (BDS-3), there exist various DCBs of new frequencies and types which should be handled.
Haijun Yuan +3 more
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A new differential code bias (C1–P1) estimation method and its performance evaluation
GPS Solutions, 2015The current satellite clock products are computed using the ionosphere-free phase (L1/L2) and code (P1/P2) observations. Thus, if users conduct undifferenced positioning using these clock products together with C1 and P2 observations, the differential code bias (DCB) (C1---P1) should be properly compensated.
Haojun Li +4 more
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BDS Code Bias and Its Effect on Wide Area Differential Service Performance
2017The integrated wide-area differential system of BDS broadcasts differential corrections to compensate broadcast ephemeris errors and enhance user positioning accuracy. It uses real-time pseudo-range observations from ground monitoring stations and calculates differential corrections, which are then broadcasted to users through the GEO satellites ...
Sainan Yang +6 more
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Determination of Differential Code Bias of GNSS Receiver Onboard Low Earth Orbit Satellite
IEEE Transactions on Geoscience and Remote Sensing, 2016The uncertainty of differential code bias (DCB) is one of the main error sources in the low Earth orbit (LEO) based total electron content (TEC) retrieval, whereas the derivation of the LEO DCB is not systematically studied. In this paper, we propose an improved DCB estimation method (ZERO method) based on the assumption that the LEO-based TEC can ...
Jiahao Zhong +3 more
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Journal of Geodesy, 2018
Differential code biases (DCBs) account for the most significant systematical biases when sensing the earth’s ionosphere with GNSS observations and are also important correction parameters in GNSS applications of positioning, navigation and timing. With the continuous modernization of the American GPS and Russian GLONASS systems, and also the rapid ...
Teng Liu +4 more
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Differential code biases (DCBs) account for the most significant systematical biases when sensing the earth’s ionosphere with GNSS observations and are also important correction parameters in GNSS applications of positioning, navigation and timing. With the continuous modernization of the American GPS and Russian GLONASS systems, and also the rapid ...
Teng Liu +4 more
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GPS Solutions, 2016
Differential code bias (DCB) is one of the main error sources of the positioning, navigation and timing services and slant total electron content extraction. The DCB can usually be estimated together with ionospheric model coefficients from the data of International GNSS Service stations. However, the precision of the BeiDou Navigation Satellite System
Bao Shu +6 more
openaire +1 more source
Differential code bias (DCB) is one of the main error sources of the positioning, navigation and timing services and slant total electron content extraction. The DCB can usually be estimated together with ionospheric model coefficients from the data of International GNSS Service stations. However, the precision of the BeiDou Navigation Satellite System
Bao Shu +6 more
openaire +1 more source