PERFORMANCE ANALYSIS OF AMBIGUITY RESOLUTION ON PPP AND RELATIVE POSITIONING TECHNIQUES: CONSIDERATION OF SATELLITE GEOMETRY

In precise relative positioning applications, an effective approach to improve the interoperability of GNSS systems is the tightly combining or inter-system double-differencing of observations from the common frequencies that are shared by different constellations. As the BeiDou satellites are currently transmitting a B2 signal at 1207.14 MHz that is identical to the Galileo E5b signal, the inter-system double-differenced observations can also be created between observations from both systems at that particular frequency. In this paper, we will focus on the instantaneous ambiguity resolution performance analysis of tightly combining BeiDou B2 and Galileo E5b observations. The size and stability of phase and code Differential Inter-System Biases (DISBs) between BeiDou B2 and Galileo E5b signals are first investigated, in which the new BeiDou and Galileo satellites launched recently will also be included. Then, first results of the Tightly Combined Model (TCM) with a priori corrected DISBs (TCM_C) are evaluated in comparison to the Loosely Combined Model (LCM) and tightly combined model with unknown DISBs (TCM_F) in an instantaneous approach. It is demonstrated that the instantaneous integer ambiguity resolution performance can be improved using the TCM_C with respect to LCM and TCM_F.

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Performance analysis of geometry‐free and ionosphere‐free code–carrier phase observation models in integer ambiguity resolution

IET Radar Sonar & Navigation ◽

10.1049/iet-rsn.2018.5036 ◽

2018 ◽

Vol 12 (11) ◽

pp. 1313-1319 ◽

Cited By ~ 1

Author(s):

Padma Bolla ◽

Jong‐Hoon Won

Keyword(s):

Performance Analysis ◽

Ambiguity Resolution ◽

Carrier Phase ◽

Integer Ambiguity Resolution ◽

Integer Ambiguity ◽

Phase Observation ◽

Carrier Phase Observation ◽

Free Code

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Analysis of Three-Carrier Ambiguity Resolution Technique for Precise Relative Positioning in GNSS-2

Navigation ◽

10.1002/j.2161-4296.1999.tb02392.x ◽

1999 ◽

Vol 46 (1) ◽

pp. 13-23 ◽

Cited By ~ 25

Author(s):

U. VOLLATH ◽

S. BIRNBACH ◽

L. LANDAU ◽

J. M. FRAILE-ORDOÑEZ ◽

M. MARTÍ-NEIRA

Keyword(s):

Ambiguity Resolution ◽

Relative Positioning ◽

Three Carrier Ambiguity Resolution

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Multiplatform Instantaneous GNSS Ambiguity Resolution for Triple- and Quadruple-Antenna Configurations with Constraints

International Journal of Navigation and Observation ◽

10.1155/2009/565426 ◽

2009 ◽

Vol 2009 ◽

pp. 1-14 ◽

Cited By ~ 13

Author(s):

Peter J. Buist ◽

Peter J. G. Teunissen ◽

Gabriele Giorgi ◽

Sandra Verhagen

Keyword(s):

Success Rate ◽

Ambiguity Resolution ◽

Attitude Determination ◽

Relative Positioning ◽

Additional Advantage ◽

Gnss Ambiguity Resolution

Traditionally the relative positioning and attitude determination problem are treated as independent. In this contribution we will investigate the possibilities of using multiantenna (i.e., triple and quadruple) data, not only for attitude determination but also for relative positioning. The methods developed are rigorous and have the additional advantage that they improve ambiguity resolution on the unconstrained baseline(s) and the overall success rate of ambiguity resolution between a number of antennas.

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THE EFFECT OF GPS SATELLITE GEOMETRY ON THE PRECISION OF DGPS POSITIONING IN MINNA, NIGERIA

Jurnal Teknologi ◽

10.11113/jt.v77.6318 ◽

2015 ◽

Vol 77 (12) ◽

Author(s):

Opaluwa Y. D. ◽

Okorocha V. C. ◽

Abazu I. C. ◽

Odumosu J. O. ◽

Ajayi G. O.

Keyword(s):

Standard Error ◽

Statistical Tests ◽

Temporal Variations ◽

Relative Positioning ◽

The Earth ◽

Satellite Geometry ◽

Amplifying Effect ◽

Average Standard Error ◽

The Impact ◽

Positional Data

This paper investigates the effect of Satellite Geometry in the Precision of DGPS positioning, since it has an amplifying effect on other sources of errors associated with GPS positioning. DGPS positional data were acquired at three epochs of a day using Promak3 DGPS and post-processed using GNSS solution software. The temporal variations in PDOP, number of visible satellites and the standard errors in relative positioning, (which are all functions of the satellite geometry) were analysed both graphically and statistically (using statext v1.0 software) to ascertain the impact of satellite geometry on the derived positions. The graphical results indicated various temporal variations in the parameters defining a GPS-based position on the earth surface; but the statistical tests conducted show no significant differences in the means of the PDOP and standard error in relative positioning obtained in three epochs at 0.05 significant level. Also, for the short ranges, an average standard error of 0.046m, 0.043m and 0.092m were obtained at the three epochs respectively; while for the medium ranges an average standard error of 0.112m, 0.096m, and 0.123m were obtained at the three epochs respectively.it was concluded that the longer the occupation time, the better the satellite geometry and thus the higher the precision in DGPS positioning.

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