A Study on Pseudo-Range Correction Modeling in order to Improve DGNSS Accuracy

Title & Authors
A Study on Pseudo-Range Correction Modeling in order to Improve DGNSS Accuracy
Sohn, Dong Hyo; Park, Kwan Dong;

Abstract
We studied on pseudo-range correction(PRC) modeling in order to improve differential GNSS(DGNSS) accuracy. The PRC is the range correction information that provides improved location accuracy using DGNSS technique. The digital correction signal is typically broadcast over ground-based transmitters. Sometimes the degradation of the positioning accuracy caused by the loss of PRC signals, radio interference, etc. To prevent the degradation, in this paper, we have designed a PRC model through polynomial curve fitting and evaluated this model. We compared two quantities, estimations of PRC using model parameters and observations from the reference station. In the case of GPS, the average is 0.1m and RMSE is 1.3m. Most of GPS satellites have a bias error of less than $\small{{\pm}1.0m}$ and a RMSE within 3.0m. In the case of GLONASS, the average and the RMSE are 0.2m and 2.6m, respectively. Most of satellites have less than $\small{{\pm}2.0m}$ for a bias error and less than 3.0m for RMSE. These results show that the estimated value calculated by the model can be used effectively to maintain the accuracy of the user's location. However;it is needed for further work relating to the big difference between the two values at low elevation.
Keywords
DGNSS;GPS;GLONASS;Pseudo Range Correction;
Language
Korean
Cited by
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