Next Article in Journal
Polarizer-Free AOTF-Based SWIR Hyperspectral Imaging for Biomedical Applications
Previous Article in Journal
Fault Detection and Classification in MMC-HVDC Systems Using Learning Methods
Open AccessArticle

High-Accuracy Positioning Based on Pseudo-Ranges: Integrated Difference and Performance Analysis of the Loran System

National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(16), 4436; https://doi.org/10.3390/s20164436
Received: 7 July 2020 / Revised: 28 July 2020 / Accepted: 5 August 2020 / Published: 8 August 2020
(This article belongs to the Section Remote Sensors)
The Long Range Navigation (Loran) system as a backup of the Global Navigation Satellite System (GNSS) is a good choice. The dominant deterioration factors of position accuracy are the pseudo-range measurement errors and the geometric dilution of precision (GDOP). This paper focuses on the algorithm integrated difference with pseudo-ranges to improve the position accuracy. Firstly, the theoretical prediction of propagation delay and raw measurement are compared. The results show that the measured pseudo-range consists of a constant term and a temporal term, which reflect the propagation situation along the true path. Secondly, a position solution algorithm based on a pseudo-range and difference is presented, exceeding the limit of a single chain. Finally, some simulation tests are implemented utilizing the new proposed position algorithm to verify the differential performance. This method can reduce the GDOP conveniently through increasing the number of transmitters. In view of the amplitude and characteristics of errors in measurement, systematic error and random noise are distinguished and discussed. The absolute accuracy responds to the pseudo-range bias that is different from geometric distance and repeatable accuracy is mainly influenced by random noise. The difference method can improve the absolute accuracy via the correction degree without changing the geometry of the transmitters. View Full-Text
Keywords: Loran; position; geometrical dilution of precision; accuracy; difference method Loran; position; geometrical dilution of precision; accuracy; difference method
Show Figures

Figure 1

MDPI and ACS Style

Yan, B.; Li, Y.; Guo, W.; Hua, Y. High-Accuracy Positioning Based on Pseudo-Ranges: Integrated Difference and Performance Analysis of the Loran System. Sensors 2020, 20, 4436.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop