ABSTRACT
MEASUREMENT AND PREDICTION OF THE EFFECTS OF MULTIPATH ON THE GNSS RECEIVER POSITIONING ACCURACY IN A MULTI-GNSS ENVIRONMENT
Acta Electronica Malaysia (AEM)
Author:Adewumi Adebayo Segun, Somnath Mahato, Sukabya Dan, Rajkumar Mandal, Rahul Mondal, Anindya Bose
This is an open access article distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
DOI :10.26480/aem.01.2024.21.24
As urban areas demand position information for transportation, disaster management, and smart agriculture, Global Navigation Satellite System (GNSS) usage increases. However, multipath error sources from buildings and trees can degrade GNSS performance, posing a serious challenge to urban navigation systems. This study analyzed the impact of multipath on GNSS receiver positioning accuracy in three different reference coordinates (RC), namely (23.2547ON, 87.8468OE, -26.056m, RC1), (23.2544ON, 87.8470OE, -25.919m, RC2), and (23.2545ON, 87.8468OE, -17.599m, RC3), characterized as in-between 2 building walls (RC1), in-between building wall and trees (RC2), and open sky environment (RC3), within the vicinity of the GNSS Laboratory at the University of Burdwan, India, using a dual frequency Javad Triumph L S geodetic receiver. In this study, Signal Strength (C/No), Precise Point Positioning (PPP), Number of Satellites in View (NSV), Geometric Dilution of Precision (GDOP), 3-Distance Radial Mean Square (3-DRMS) position error, and Position Dilution of Precision (PDOP) were used as performance metrics to evaluate the position accuracy of the processed Rinex 2.11 data. The open sky environment (RC3) result showcases less than 4mm horizontal and 11cm vertical PPP accuracy in GPS and GPS+GLONASS hybrid modes of operation, indicating the best position for GNSS PPP when compared with the 15mm horizontal, 89cm vertical, and 27mm horizontal, 57cm vertical PPP accuracies of RC1 and RC2. Further analysis results show that the same RC3 has the highest C/No, maximum NSV, very low GDOP, and PDOP with the least 3DRMS position error of the measured constellations compared to the other two RC locations. Moreover, it was noticed that the multi-GNSS hybrid mode of operation technique adopted in this study mitigates the position error and enhances the GNSS receiver’s positioning accuracy. Hence, this paper has significantly contributed to the study of multipath effects on GNSS receivers’ positioning accuracy in different GNSS propagation channel scenarios.
| Pages | 21-24 |
| Year | 2024 |
| Issue | 1 |
| Volume | 8 |
