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Journal articles on the topic 'Precise Point Positioning'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 March 2023

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1

Ge, Maorong, Jan Douša, Xingxing Li, Markus Ramatschi, Thomas Nischan, and Jens Wickert. "A Novel Real-time Precise Positioning Service System: Global Precise Point Positioning With Regional Augmentation." Journal of Global Positioning Systems 11, no. 1 (June 30, 2012): 2–10. http://dx.doi.org/10.5081/jgps.11.1.2.

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2

Savchuk, Stepan, Janusz Cwiklak, and Alina Khoptar. "Precise Point Positioning Technique Versus Relative Positioning." Baltic Surveying 12 (June 29, 2020): 39–43. http://dx.doi.org/10.22616/j.balticsurveying.2020.006.

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Precise point positioning is a GNSS based positioning method that is known to regaining more precise information about major systematical errors in its functional model. This method is seen as an advanced version of the conventional absolute positioning method that is able to offer higher accuracy of the estimate parameter. Contrarily, the relative positioning method is able to achieve high precise of the estimated parameters by using two or more receiver. Nowadays because of this development, the PPP technique it started to grow on the detriment of the relative GNSS positioning. PPP, it is able to offer point determination by processing undifferenced dual frequency receiver, combine with precise orbit and clock corrections offered by JPL to obtain centimeter/millimeter accuracy. The aim of this paper is to make a comparative study between Precise Point Positioning (PPP) versus relative positioning under different conditions.

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3

Voytenko, A. V., and V. L. Bykov. "Precise Point Positioning – short review." Geodesy and Cartography 914, no. 8 (September 20, 2016): 26–30. http://dx.doi.org/10.22389/0016-7126-2016-914-8-26-30.

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4

Voytenko, A. V. "Realization of the Precise Point Positioning (PPP) technique and its accuracy." Geodesy and Cartography 927, no. 9 (October 20, 2017): 42–49. http://dx.doi.org/10.22389/0016-7126-2017-927-9-42-49.

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The article notes that the replacement of the English name «Precise Point Positioning» (PPP) in Russian-language sources is possible using the term «accurate differential positioning» (TDP) technique. The author proposes to use both terms. This article contains information about the practical implementation of the PPP in the on-line service. The author has analyzed the research on the accuracy of PPP foreign and domestic experts and scholars. The author analyzed the data about the convergence time for PPP solutions. These data belong to another Russian scientist. The results of evaluating the accuracy of the PPP of different scientists led to the next. The author of this article gave the mean square errors topocentric coordinates of the geodetic points. The coordinates of the points must be obtained by dual-frequency GPS-measurements for a period of 24 hours with the help of PPP. The author proposed a formula for the calculation of the mean square error of the spatial position of geodetic point, if its position is obtained in the processing of dual-frequency GPS-observations of less than 24 hours. The article written conclusions about the features, defects and PPP development.

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5

Bisnath, S., and P. Collins. "Recent Developments in Precise Point Positioning." GEOMATICA 66, no. 2 (June 2012): 103–11. http://dx.doi.org/10.5623/cig2012-023.

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In standard Precise Point Positioning (PPP), the carrier phase ambiguities are estimated as real-valued constants, so that the carrier-phases can provide similar information as the pseudoranges. As a consequence, it can take tens of minutes to several hours for the ambiguities to converge to suitably precise values. Recently, new processing methods have been identified that permit the ambiguities to be estimated more appropriately as integer-valued constants, as they are in relative Real-Time Kinematic (RTK) positioning. Under these conditions, standard ambiguity resolution techniques can be applied to strengthen the PPP solution. The result can be a greatly reduced solution convergence and re-convergence period, representing a significant step toward improving the performance of PPP with respect to that of RTK processing. This paper describes the underlying principles of the method, why the enhancements work, and presents some results.

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6

Petit, Gérard, and Zhiheng Jiang. "Precise Point Positioning for TAI Computation." International Journal of Navigation and Observation 2008 (February 28, 2008): 1–8. http://dx.doi.org/10.1155/2008/562878.

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We discuss the use of some new time transfer techniques for computing TAI time links. Precise point positioning (PPP) uses GPS dual frequency carrier phase and code measurements to compute the link between a local clock and a reference time scale with the precision of the carrier phase and the accuracy of the code. The time link between any two stations can then be computed by a simple difference. We show that this technique is well adapted and has better short-term stability than other techniques used in TAI. We present a method of combining PPP and two-way time transfer that takes advantage of the qualities of each technique, and shows that it would bring significant improvement to TAI links.

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7

Bhat, S. P., and D. K. Miu. "Precise Point-to-Point Positioning Control of Flexible Structures." Journal of Dynamic Systems, Measurement, and Control 112, no. 4 (December 1, 1990): 667–74. http://dx.doi.org/10.1115/1.2896193.

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Control strategies to accomplish precise point-to-point positioning of flexible structures are discussed. First, the problem is formulated and solved in closed form using a linear quadratic optimal control technique for a simple system with only one rigid and one flexible mode; the resulting analytical solutions are examined in both the time and frequency domain. In addition, the necessary and sufficient condition for zero residual vibration is derived which simply states that the Laplace transform of the time bounded control input must vanish at the system poles. This criteria is then used to highlight the common features of existing techniques and to outline an alternative design procedure for precise position control of more complicated structures having multiple flexible modes.

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8

El-Mowafy, A. "Alternative Postprocessing Relative Positioning Approach Based on Precise Point Positioning." Journal of Surveying Engineering 135, no. 2 (May 2009): 56–65. http://dx.doi.org/10.1061/(asce)0733-9453(2009)135:2(56).

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9

Xiong, Jing, and Fei Han. "Positioning performance analysis on combined GPS/BDS precise point positioning." Geodesy and Geodynamics 11, no. 1 (January 2020): 78–83. http://dx.doi.org/10.1016/j.geog.2019.11.001.

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10

Tuchband, Tamás. "Gps precise point positioning with kinematic data." Pollack Periodica 6, no. 3 (December 2011): 73–82. http://dx.doi.org/10.1556/pollack.6.2011.3.7.

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11

Li, Pan, and Xiaohong Zhang. "Precise Point Positioning with Partial Ambiguity Fixing." Sensors 15, no. 6 (June 10, 2015): 13627–43. http://dx.doi.org/10.3390/s150613627.

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12

Nosek, Jakub, and Pavel Václavovic. "Earthquake Magnitude Estimation using Precise Point Positioning." IOP Conference Series: Earth and Environmental Science 906, no. 1 (November 1, 2021): 012107. http://dx.doi.org/10.1088/1755-1315/906/1/012107.

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Abstract An accurate estimation of an earthquake magnitude plays an important role in targeting emergency services towards affected areas. Along with the traditional methods using seismometers, site displacements caused by an earthquake can be monitored by the Global Navigation Satellite Systems (GNSS). GNSS can be used either in real-time for early warning systems or in offline mode for precise monitoring of ground motion. The Precise Point Positioning (PPP) offers an optimal method for such purposes, because data from only one receiver are considered and thus not affected by other potentially not stable stations. Precise external products and empirical models have to be applied, and the initial convergence can be reduced or eliminated by the backward smoothing strategy or integer ambiguity resolution. The product for the magnitude estimation is a peak ground displacement (PGD). PGDs observed at many GNSS stations can be utilized for a robust estimate of an earthquake magnitude. We tested the accuracy of estimated magnitude scaling when using displacement waveforms collected from six selected earthquakes between the years 2016 and 2020 with magnitudes in a range of 7.5–8.2 Moment magnitude MW. We processed GNSS 1Hz and 5Hz data from 182 stations by the PPP method implemented in the G-Nut/Geb software. The precise satellites orbits and clocks corrections were provided by the Center for Orbit Determination in Europe (CODE). PGDs derived on individual GNSS sites formed the basis for ground motion parameters estimation. We processed the GNSS observations by the combination of the Kalman filter (FLT) and the backward smoother (SMT), which significantly enhanced the kinematic solution. The estimated magnitudes of all the included earthquakes were compared to the reference values released by the U. S. Geological Survey (USGS). The moment magnitude based on SMT was improved by 20% compared to the FLT-only solution. An average difference from the comparison was 0.07 MW and 0.09 MW for SMT and FLT solutions, respectively. The corresponding standard deviations were 0.18 MW and 0.22 MW for SMT and FLT solutions, which shows a good consistency of our and the reference estimates.

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13

Juan, J. M., M. Hernandez-Pajares, J. Sanz, P. Ramos-Bosch, A. Aragon-Angel, R. Orus, W. Ochieng, et al. "Enhanced Precise Point Positioning for GNSS Users." IEEE Transactions on Geoscience and Remote Sensing 50, no. 10 (October 2012): 4213–22. http://dx.doi.org/10.1109/tgrs.2012.2189888.

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14

Chen, Junping, Haojun Li, Bin Wu, Yize Zhang, Jiexian Wang, and Congwei Hu. "Performance of Real-Time Precise Point Positioning." Marine Geodesy 36, no. 1 (March 1, 2013): 98–108. http://dx.doi.org/10.1080/01490419.2012.699503.

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15

Grayson, Ben, Nigel T. Penna, Jon P. Mills, and Darion S. Grant. "GPS precise point positioning for UAV photogrammetry." Photogrammetric Record 33, no. 164 (November 5, 2018): 427–47. http://dx.doi.org/10.1111/phor.12259.

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16

Sugimoto, Sueo, and Yukihiro Kubo. "GNSS Regressive Models and Precise Point Positioning." Proceedings of the ISCIE International Symposium on Stochastic Systems Theory and its Applications 2005 (May 5, 2005): 159–64. http://dx.doi.org/10.5687/sss.2005.159.

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17

Knoop, Victor L., Peter F. de Bakker, Christian C. J. M. Tiberius, and Bart van Arem. "Lane Determination With GPS Precise Point Positioning." IEEE Transactions on Intelligent Transportation Systems 18, no. 9 (September 2017): 2503–13. http://dx.doi.org/10.1109/tits.2016.2632751.

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18

Li, Haojun, Junping Chen, Jiexian Wang, Congwei Hu, and Zhiqiang Liu. "Network based real-time precise point positioning." Advances in Space Research 46, no. 9 (November 2010): 1218–24. http://dx.doi.org/10.1016/j.asr.2010.06.015.

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19

El-Mowafy, Ahmed. "Precise Point Positioning in the Airborne Mode." International Conference on Aerospace Sciences and Aviation Technology 14, AEROSPACE SCIENCES (May 1, 2011): 1–10. http://dx.doi.org/10.21608/asat.2011.23246.

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20

Nistor, Sorin, and Aurelian Stelian Buda. "High rate 30 seconds vs clock interpolation in precise point positioning (PPP)." Geodetski vestnik 60, no. 3 (2016): 482–94. http://dx.doi.org/10.15292/geodetski-vestnik.2016.03.482-494.

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21

Nistor, Sorin, and Aurelian Stelian Buda. "High rate 30 seconds vs clock interpolation in Precise Point Positioning (PPP)." Geodetski vestnik 60, no. 03 (2016): 483–94. http://dx.doi.org/10.15292/geodetski-vestnik.2016.03.483-494.

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22

Azab, Mohamed, Ahmed El-Rabbany, M. Nabil Shoukry, Ramadan Khalil, and Akram Afifi. "Performance Analysis of GPS/GLONASS Precise Point Positioning." GEOMATICA 67, no. 4 (December 2013): 237–42. http://dx.doi.org/10.5623/cig2013-049.

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Precise Point Positioning (PPP) with Global Positioning Systems (GPS) has attracted the attention of many researchers over the past decade. Recently, the Russian global navigation satellite system (GLONASS) has been modernized and restored to near full constellation status, which has made it more attractive for positioning and navigation. Having two healthy systems, namely GPS and GLONASS provides a combination of both constellations, which in turn promises to improve the availability, positioning accuracy, and reliability of PPP solutions. This study investigates the effect of combining GPS and GLONASS dual-frequency measurements on the static PPP solution and its sensitivity to different processing strategies. Many data sets from five globally distributed International GNSS Service (IGS) tracking stations were processed using the Bernese GPS software package. The addition of GLONASS constellation improved the satellite visibility and geometry by more than 60%, and 40%, respectively, and improves the positioning convergence by up to 41%, 38%, and 19% in east, north, and up directions, respectively.

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23

Choi, Byung-Kyu, Jeong-Ho Back, Sung-Ki Cho, Jong-Uk Park, and Pil-Ho Park. "Development of Precise Point Positioning Method Using Global Positioning System Measurements." Journal of Astronomy and Space Sciences 28, no. 3 (September 15, 2011): 217–23. http://dx.doi.org/10.5140/jass.2011.28.3.217.

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24

Li, Xiao Yu, Jun Wang, and Ya Tao Liu. "Performance Analysis of GPS/BDS Precise Point Positioning." Applied Mechanics and Materials 713-715 (January 2015): 1123–26. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.1123.

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Precise Point Positioning (PPP) with GPS measurements has achieved a level of success. In order to benefit from the multiple available constellations, research has been undertaken to combineGPS and BDS measurements in PPP processing.Mathematical models of GPS/BDS combined precise point positioning are introduced in this paper. GPS/BDS combined PPP models are developed based on the GPS-only PPP. The data pre-processing steps include applying satellite orbit and clock corrections, satellite antenna phase offset correction, receiver antenna phase offset correction, differential code bias corrections, troposphere delay corrections and the the Ionosphere-free observation combination is used. The results show that the positioning precision and convergence speed of GPS/BDS combined PPP are improved compared with GPS-only PPP.

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25

Guo, Fei, and Xiaohong Zhang. "Adaptive robust Kalman filtering for precise point positioning." Measurement Science and Technology 25, no. 10 (September 15, 2014): 105011. http://dx.doi.org/10.1088/0957-0233/25/10/105011.

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26

Henkel, Patrick S. "Tightly coupled precise point positioning and attitude determination." IEEE Transactions on Aerospace and Electronic Systems 51, no. 4 (October 2015): 3182–97. http://dx.doi.org/10.1109/taes.2015.140568.

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27

Sugimoto, Sueo, Yukihiro Kubo, and Seigo Fujita. "Very Precise Point Positioning Based on GR Models." Proceedings of the ISCIE International Symposium on Stochastic Systems Theory and its Applications 2007 (May 5, 2007): 174–79. http://dx.doi.org/10.5687/sss.2007.174.

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28

Miyazaki, Takashi, Yukihiro Kubo, and Sueo Sugimoto. "Precise Point Positioning by Combining GPS and GLONASS." Proceedings of the ISCIE International Symposium on Stochastic Systems Theory and its Applications 2012 (May 5, 2012): 127–33. http://dx.doi.org/10.5687/sss.2012.127.

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29

Héroux, P., and J. Kouba. "GPS precise point positioning using IGS orbit products." Physics and Chemistry of the Earth, Part A: Solid Earth and Geodesy 26, no. 6-8 (January 2001): 573–78. http://dx.doi.org/10.1016/s1464-1895(01)00103-x.

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30

Jokinen, Altti, Shaojun Feng, Wolfgang Schuster, Washington Ochieng, Chris Hide, Terry Moore, and Chris Hill. "GLONASS Aided GPS Ambiguity Fixed Precise Point Positioning." Journal of Navigation 66, no. 3 (March 25, 2013): 399–416. http://dx.doi.org/10.1017/s0373463313000052.

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The Precise Point Positioning (PPP) concept enables centimetre-level positioning accuracy by employing one Global Navigation Satellite System (GNSS) receiver. The main advantage of PPP over conventional Real Time Kinematic (cRTK) methods is that a local reference network infrastructure is not required. Only a global reference network with approximately 50 stations is needed because reference GNSS data is required for generating precise error correction products for PPP. However, the current implementation of PPP is not suitable for some applications due to the long time period (i.e. convergence time of up to 60 minutes) required to obtain an accurate position solution. This paper presents a new method to reduce the time required for initial integer ambiguity resolution and to improve position accuracy. It is based on combining GPS and GLONASS measurements to calculate the float ambiguity positioning solution initially, followed by the resolution of GPS integer ambiguities.The results show that using the GPS/GLONASS float solution can, on average, reduce the time to initial GPS ambiguity resolution by approximately 5% compared to using the GPS float solution alone. In addition, average vertical and horizontal positioning errors at the initial ambiguity resolution epoch can be reduced by approximately 17% and 4%, respectively.

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31

Elsobeiey, Mohamed. "Precise Point Positioning using Triple-Frequency GPS Measurements." Journal of Navigation 68, no. 3 (November 25, 2014): 480–92. http://dx.doi.org/10.1017/s0373463314000824.

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Precise Point Positioning (PPP) performance is improving under the ongoing Global Positioning System (GPS) modernisation program. The availability of the third frequency, L5, enables triple-frequency combinations. However, to utilise the modernised L5 signal along with the existing GPS signals, P1-C5 differential code bias must be determined. In this paper, the global network of Multi-Global Navigation Satellite System Experiment (MGEX) stations was used to estimate P1-C5 satellites differential code biases $(DCB_{P1 - C5}^S )$. Mathematical background for triple-frequency linear combinations was provided along with the resultant noise and ionosphere amplification factors. Nine triple-frequency linear combinations were chosen, based on different criteria, for processing the modernised L5 signal along with the legacy GPS signals. Finally, test results using real GPS data from ten MGEX stations were provided showing the benefits of the availability of the third frequency on PPP solution convergence time and the precision of the estimated parameters. It was shown that triple-frequency combinations could improve the PPP convergence time and the precision of the estimated parameters by about 10%. These results are considered promising for using the modernised GPS signals for precise positioning applications especially when the fully modernised GPS constellation is available.

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32

Le, Anh Quan, and Christian Tiberius. "Single-frequency precise point positioning with optimal filtering." GPS Solutions 11, no. 1 (July 11, 2006): 61–69. http://dx.doi.org/10.1007/s10291-006-0033-9.

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33

Geng, J., F. N. Teferle, X. Meng, and A. H. Dodson. "Kinematic precise point positioning at remote marine platforms." GPS Solutions 14, no. 4 (January 7, 2010): 343–50. http://dx.doi.org/10.1007/s10291-009-0157-9.

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34

Leandro, Rodrigo F., Marcelo C. Santos, and Richard B. Langley. "Analyzing GNSS data in precise point positioning software." GPS Solutions 15, no. 1 (June 18, 2010): 1–13. http://dx.doi.org/10.1007/s10291-010-0173-9.

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35

Sterle, Oskar, Bojan Stopar, and Polona Pavlovčič Prešeren. "Single-frequency precise point positioning: an analytical approach." Journal of Geodesy 89, no. 8 (April 29, 2015): 793–810. http://dx.doi.org/10.1007/s00190-015-0816-2.

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36

Cai, Changsheng, and Yang Gao. "GLONASS-based precise point positioning and performance analysis." Advances in Space Research 51, no. 3 (February 2013): 514–24. http://dx.doi.org/10.1016/j.asr.2012.08.004.

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37

Guo, Jing, Xingxing Li, Zhenhong Li, Leyin Hu, Guijun Yang, Chunjiang Zhao, David Fairbairn, David Watson, and Maorong Ge. "Multi-GNSS precise point positioning for precision agriculture." Precision Agriculture 19, no. 5 (March 14, 2018): 895–911. http://dx.doi.org/10.1007/s11119-018-9563-8.

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38

Huang, Zhenchuan, Shuanggen Jin, Ke Su, and Xu Tang. "Multi-GNSS Precise Point Positioning with UWB Tightly Coupled Integration." Sensors 22, no. 6 (March 14, 2022): 2232. http://dx.doi.org/10.3390/s22062232.

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Global Navigation Satellite Systems (GNSSs) can provide high-precision positioning services, which can be applied to fields including navigation and positioning, autonomous driving, unmanned aerial vehicles and so on. However, GNSS signals are easily disrupted in complex environments, which results in a positioning performance with a significantly inferior accuracy and lengthier convergence time, particularly for the single GNSS system. In this paper, multi-GNSS precise point positioning (PPP) with tightly integrating ultra-wide band (UWB) technology is presented to implement fast and precise navigation and positioning. The validity of the algorithm is evaluated by a set of GNSS and UWB data. The statistics indicate that multi-GNSS/UWB integration can significantly improve positioning performance in terms of the positioning accuracy and convergence time. The improvement of the positioning performance for the GNSS/UWB tightly coupled integration mainly concerns the north and east directions, and to a lesser extent, the vertical direction. Furthermore, the convergence performance of GNSS/UWB solution is analyzed by simulating GNSS signal interruption. The reliability and robustness of GNSS/UWB solution during GNSS signal interruption is verified. The results show that multi-GNSS/UWB solution can significantly improve the accuracy and convergence speed of PPP.

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Liao, Shujian, Chenbo Yang, and Dengao Li. "Improving precise point positioning performance based on Prophet model." PLOS ONE 16, no. 1 (January 19, 2021): e0245561. http://dx.doi.org/10.1371/journal.pone.0245561.

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Precision point positioning (PPP) is widely used in maritime navigation and other scenarios because it does not require a reference station. In PPP, the satellite clock bias (SCB) cannot be eliminated by differential, thus leading to an increase in positioning error. The prediction accuracy of SCB has become one of the key factors restricting positioning accuracy. Although International GNSS Service (IGS) provides the ultra-rapid ephemeris prediction part (IGU-P), its quality and real-time performance can not meet the practical application. In order to improve the accuracy of PPP, this paper proposes to use the Prophet model to predict SCB. Specifically, SCB sequence is read from the observation part in the ultra-rapid ephemeris (IGU-O) released by IGS. Next, the SCB sequence between adjacent epochs are subtracted to obtain the corresponding SCB single difference sequence. Then using the Prophet model to predict SCB single difference sequence. Finally, the prediction result is substituted into the PPP positioning observation equation to obtain the positioning result. This paper uses the final ephemeris (IGF) published by IGS as a benchmark and compares the experimental results with IGU-P. For the selected four satellites, compared with the results of the IGU-P, the accuracy of SCB prediction of the model in this paper is improved by about 50.3%, 61.7%, 60.4%, and 48.8%. In terms of PPP positioning results, we use Real-time kinematic (RTK) measurements as a benchmark in this paper. Positioning accuracy has increased by 26%, 35%, and 19% in the N, E, and U directions, respectively. The results show that the Prophet model can improve the performance of PPP.

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Li, Fangxin, Rui Tu, Ju Hong, Shixuan Zhang, Mingyue Liu, and Xiaochun Lu. "Performance Analysis of BDS–5G Combined Precise Point Positioning." Remote Sensing 14, no. 13 (June 23, 2022): 3006. http://dx.doi.org/10.3390/rs14133006.

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Precise point positioning (PPP) technology is one of the core technologies in the field of GNSS high-precision positioning. It is used widely because it can realize centimeter-level positioning in outdoor environments by using only a single receiver. However, its convergence is time-consuming, particularly in urban areas where satellite occlusion is more severe. A combined BeiDou Navigation Satellite System (BDS) and fifth generation mobile communication technology (5G) PPP observation model is proposed, in which the two kinds of observations are combined and solved at the original observation level. The impact of different numbers and geometries of 5G base stations on the convergence time of PPP is analyzed from both static and dynamic perspectives. The results confirm that PPP technology combining BDS and 5G can effectively accelerate convergence while improving the accuracy of positioning.

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41

Xu, Rui, Zhizhao Liu, Min Li, Yu Morton, and Wu Chen. "An Analysis of Low-Latitude Ionospheric Scintillation and Its Effects on Precise Point Positioning." Journal of Global Positioning Systems 11, no. 1 (June 30, 2012): 22–32. http://dx.doi.org/10.5081/jgps.11.1.22.

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42

Wisnu Wardhana, Gunawan. "POSITIONING EVALUATION WITH GNSS USING REALTIME PRECISE POINT POSITIONING METHOD FOR MINING MAPING SURVEY." Journal of Marine-Earth Science and Technology 3, no. 1 (June 30, 2022): 18–21. http://dx.doi.org/10.12962/j27745449.v3i1.485.

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Real Time Precise-Point Positioning (RT-PPP) is a relatively new method for satellite-based positioning or better known as the Global Navigation Satellite System (GNSS). RT-PPP has similarities with PPP in terms of data accuracy and precision because it was developed from the previous method called Precise Point Positioning (PPP). However, RT-PPP has an advantage in real time because it gets correction from the L-band in the Satellite Based Augmentation System (SBAS). This study aims to evaluate the RT-PPP method for mining surveys. The precision evaluation was carried out repeatedly for 7 days at specific points, while accuracy testing was compared with the static differential method at 11 points spread over the mining area. The results showed that the standard deviation of the RT-PPP method was 1.0 cm and 1.1 cm in the east and north, 3 cm in elevation. The accuracy test shows 17.5 cm for the RMSE horizontally and 6.2 cm vertically.

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43

El Manaily, Emad, Mahmoud Abd Rabbou, Adel El-Shazly, and Moustafa Baraka. "Evaluation of Quad-Constellation GNSS Precise Point Positioning in Egypt." Artificial Satellites 52, no. 1 (March 1, 2017): 9–18. http://dx.doi.org/10.1515/arsa-2017-0002.

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Abstract Commonly, relative GPS positioning technique is used in Egypt for precise positioning applications. However, the requirement of a reference station is usually problematic for some applications as it limits the operational range of the system and increases the system cost and complexity On the other hand; the single point positioning is traditionally used for low accuracy applications such as land vehicle navigation with positioning accuracy up to 10 meters in some scenarios which caused navigation problems especially in downtown areas. Recently, high positioning accuracy can be obtained through Precise Point Positioning (PPP) technique in which only once GNSS receiver is used. However, the major drawback of PPP is the long convergence time to reach to the surveying grade accuracy compared to the existing relative techniques. Moreover, the PPP accuracy is significantly degraded due to shortage in satellite availability in urban areas. To overcome these limitations, the quad constellation GNSS systems namely; GPS.GLONASS, Galileo and BeiDou can be combined to increase the satellite availability and enhance the satellite geometry which in turn reduces the convergence time. In Egypt, at the moment, the signals of both Galileo and BeiDou could be logged with limited number of satellites up to four and six satellites for both Systems respectively. In this paper, we investigated the performance of the Quad-GNSS positioning in both dual- and single-frequency ionosphere free PPP modes for both high accurate and low cost navigation application, respectively. The performance of the developed PPP models will be investigated through GNSS data sets collected at three Egyptian cities namely, Cairo, Alexandria and Aswan.

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Zou, Junping, Ahao Wang, and Jiexian Wang. "Single-Frequency Precise Point Positioning Using Regional Dual-Frequency Observations." Sensors 21, no. 8 (April 18, 2021): 2856. http://dx.doi.org/10.3390/s21082856.

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High-precision and low-cost single-frequency precise point positioning (SF-PPP) has been attracting more and more attention in numerous global navigation satellite system (GNSS) applications. To provide the precise ionosphere delay and improve the positioning accuracy of the SF-PPP, the dual-frequency receiver, which receives dual-frequency observations, is used. Based on the serviced precise ionosphere delay, which is generated from the dual-frequency observations, the high-precision SF-PPP is realized. To further improve the accuracy of the SF-PPP and shorten its convergence time, the double-differenced (DD) ambiguity resolutions, which are generated from the DD algorithm, are introduced. This method avoids the estimation of fractional cycle bias (FCB) for the SF-PPP ambiguity. Here, we collected data from six stations of Shanghai China which was processed, and the corresponding results were analyzed. The results of the dual-frequency observations enhanced SF-PPP realize centimeter-level positioning. The difference between the results of two stations estimated with dual-frequency observations enhanced SF-PPP were compared with the relative positioning results computed with the DD algorithm. Experimental results showed that the relative positioning accuracy of the DD algorithm is slightly better than that of the dual-frequency observations enhanced SF-PPP. This could be explained by the effect of the float ambiguity resolutions on the positioning accuracy. The data was processed with the proposed method for the introduction of the DD ambiguity into SF-PPP and the results indicated that this method could improve the positioning accuracy and shorten the convergence time of the SF-PPP. The results could further improve the deformation monitoring ability of SF-PPP.

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Pandey, D., R. Dwivedi, O. Dikshit, and A. K. Singh. "GPS AND GLONASS COMBINED STATIC PRECISE POINT POSITIONING (PPP)." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B1 (June 3, 2016): 483–88. http://dx.doi.org/10.5194/isprsarchives-xli-b1-483-2016.

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With the rapid development of multi-constellation Global Navigation Satellite Systems (GNSSs), satellite navigation is undergoing drastic changes. Presently, more than 70 satellites are already available and nearly 120 more satellites will be available in the coming years after the achievement of complete constellation for all four systems- GPS, GLONASS, Galileo and BeiDou. The significant improvement in terms of satellite visibility, spatial geometry, dilution of precision and accuracy demands the utilization of combining multi-GNSS for Precise Point Positioning (PPP), especially in constrained environments. Currently, PPP is performed based on the processing of only GPS observations. Static and kinematic PPP solutions based on the processing of only GPS observations is limited by the satellite visibility, which is often insufficient for the mountainous and open pit mines areas. One of the easiest options available to enhance the positioning reliability is to integrate GPS and GLONASS observations. This research investigates the efficacy of combining GPS and GLONASS observations for achieving static PPP solution and its sensitivity to different processing methodology. Two static PPP solutions, namely standalone GPS and combined GPS-GLONASS solutions are compared. The datasets are processed using the open source GNSS processing environment <i>gLAB</i> 2.2.7 as well as <i>magicGNSS</i> software package. The results reveal that the addition of GLONASS observations improves the static positioning accuracy in comparison with the standalone GPS point positioning. Further, results show that there is an improvement in the three dimensional positioning accuracy. It is also shown that the addition of GLONASS constellation improves the total number of visible satellites by more than 60% which leads to the improvement of satellite geometry represented by Position Dilution of Precision (PDOP) by more than 30%.

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46

Pandey, D., R. Dwivedi, O. Dikshit, and A. K. Singh. "GPS AND GLONASS COMBINED STATIC PRECISE POINT POSITIONING (PPP)." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B1 (June 3, 2016): 483–88. http://dx.doi.org/10.5194/isprs-archives-xli-b1-483-2016.

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Abstract:

With the rapid development of multi-constellation Global Navigation Satellite Systems (GNSSs), satellite navigation is undergoing drastic changes. Presently, more than 70 satellites are already available and nearly 120 more satellites will be available in the coming years after the achievement of complete constellation for all four systems- GPS, GLONASS, Galileo and BeiDou. The significant improvement in terms of satellite visibility, spatial geometry, dilution of precision and accuracy demands the utilization of combining multi-GNSS for Precise Point Positioning (PPP), especially in constrained environments. Currently, PPP is performed based on the processing of only GPS observations. Static and kinematic PPP solutions based on the processing of only GPS observations is limited by the satellite visibility, which is often insufficient for the mountainous and open pit mines areas. One of the easiest options available to enhance the positioning reliability is to integrate GPS and GLONASS observations. This research investigates the efficacy of combining GPS and GLONASS observations for achieving static PPP solution and its sensitivity to different processing methodology. Two static PPP solutions, namely standalone GPS and combined GPS-GLONASS solutions are compared. The datasets are processed using the open source GNSS processing environment <i>gLAB</i> 2.2.7 as well as <i>magicGNSS</i> software package. The results reveal that the addition of GLONASS observations improves the static positioning accuracy in comparison with the standalone GPS point positioning. Further, results show that there is an improvement in the three dimensional positioning accuracy. It is also shown that the addition of GLONASS constellation improves the total number of visible satellites by more than 60% which leads to the improvement of satellite geometry represented by Position Dilution of Precision (PDOP) by more than 30%.

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Nguyen, Lau Ngoc. "HOW ACCURACY GPS PRECISE POINT POSITIONING CAN BE ACHIEVED?" Science and Technology Development Journal 12, no. 18 (December 15, 2009): 25–31. http://dx.doi.org/10.32508/stdj.v12i18.2379.

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We estimate the accuracy of GPS point positioning when using the most recently IGS products and applying the newest IERS models of station displacements. The processing results on 9 IGS stations show that accuracies of 5 mm in the horizontal and 10mm in the vertical can be achieved when processing 24h of static data, and about 10 cm when processing 24h of kinematic data. These accuracies make us to re-consider capabilities and new applications of GPS point positioning.

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А.O., Кupriyanov. "Orbital method evolution by Precise Point Positioning technology development." Geodesy and Aerophotosurveying 63, no. 2 (2019): 125–33. http://dx.doi.org/10.30533/0536-101x-2019-63-2-125-133.

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Hankansurijat, Chayanin, and Octavian Andrei. "Atmospheric Water Estimation Using GNSS Precise Point Positioning Method." Engineering Journal 22, no. 6 (December 4, 2018): 37–45. http://dx.doi.org/10.4186/ej.2018.22.6.37.

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BÜLBÜL, Sercan, Cevat İNAL, and Burhaneddin BİLGEN. "The Effect of Seasonal Changes on Precise Point Positioning." Konya Journal of Engineering Sciences 10, no. 2 (June 1, 2022): 274–86. http://dx.doi.org/10.36306/konjes.1024445.

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Precise Point Positioning (PPP) is a method that provides centimeter-level positioning accuracy using precise satellite orbit and clock products with a single GNSS receiver. Recently, this method has been the subject of many scientific studies. In this study, International GNSS Service (IGS) stations located in high latitude (KIR8 (Sweden), NYA2 (Norway)), mid-latitude (ANKR (Turkey), DLF1 (Netherlands)) and equatorial region (NKLG (Gabon), SIN1 (Singapore)) in northern hemisphere were selected to investigate the effect of seasons on position accuracy of PPP. RINEX data of 365 days 24 hours 30 seconds of selected stations were obtained to be used in solutions. The data obtained between 01.12.2019 and 30.11.2020 were evaluated with CSRS-PPP, MagicGNSS and APPS, which are web-based PPP services where solutions can be made within the specified date range. In order to investigate the precisions of the coordinates obtained from the web-based services, root mean square errors (RMSE) were calculated using the average coordinate values for each month, and then the 3D RMSE were calculated using the known coordinates of the stations obtained from IGS to reveal seasonal accuracies. The 3D RMSE obtained for the same stations and services in different seasons were compared with the Bartlett test. At the end of the comparison, it was seen that the 3D RMSE were in agreement at the other stations, except for the ANKR station, the positioning accuracy was dependent on the used services rather than seasons, and the best results were obtained with MagicGNSS.

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