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1 results

  • Improving DGPS Accuracy by Considering the Correlation of Pseudorange Correction and Satellite Elevation Angle

  • Sang-Hyeon Kim, Kwan-Dong Park
  • Journal:
    The Journal of Navigation / Volume 70 / Issue 6 / November 2017
    Published online by Cambridge University Press:
    22 June 2017, pp. 1267-1275
    Print publication:
    November 2017

  • One of the limitations of Differential Global Positioning Systems (DGPS) is that accuracy decreases as the distance between the user and a base station increases. We have developed a new DGPS positioning strategy that is less affected by baseline length and enables better accuracy. We found correlations between satellite elevation angle and Pseudo-Range Correction (PRC) through extensive tests. As a result, better PRC values were obtained by considering differences in satellite elevation angles at a reference site and the user location. We tested the model for a variety of baseline lengths greater than 250 km, and the positioning accuracy improved by 29–66% compared with traditional DGPS based on a single reference station. Positioning accuracies comparable to those of multi-reference DGPS were achieved in some cases.