Position Error Correction Using Differential Pseudo-Range
Position accuracy is the critical ask of all Global Navigation Satellite Systems
(GNSS), but errors like reflection, refraction, signal noise, clock errors, and
multipath degrade the range computation between the satellite and the receiver.
Incorrect range computation leads to errors in the receiver position. So
minimizing the error in the range calculation improves the position accuracy.
The differential pseudo-range technique uses two receivers, one of which is
positioned at a precisely known location to compute the range error and the
other receiver uses this error to improve its position accuracy. This paper
explains an experiment conducted at a reference point and other five points
within the range from 60 m to 120 m away from the reference point. Computing the
accurate positions for those five points using the reference station is the
objective of this experiment. The location of the reference point is precisely
known and was measured accurately by the Survey of India (SOI). The experiment
used the Indian Regional Navigation Satellite System (IRNSS/NavIC) receiver and
the differential pseudo-range technique to compute the position error of the