Near-real-time regional troposphere models for the GNSS precise point positioning technique

On 27 December 2012 it was announced officially that the Chinese Navigation Satellite System BeiDou (BDS) was able to provide operational services over the Asia-Pacific region. The quality of BDS observations was confirmed as comparable with those of GPS, and relative positioning in static and kinematic modes were also demonstrated to be very promising. As Precise Point Positioning (PPP) technology is widely recognized as a method of precise positioning service, especially in real-time, in this contribution we concentrate on the PPP performance using BDS data only. BDS PPP in static, kinematic and simulated real-time kinematic mode is carried out for a regional network with six stations equipped with GPS- and BDS-capable receivers, using precise satellite orbits and clocks estimated from a global BDS tracking network. To validate the derived positions and trajectories, they are compared to the daily PPP solution using GPS data. The assessment confirms that the performance of BDS PPP is very comparable with GPS in terms of both convergence time and accuracy.

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Evaluation of the GPS Precise Point Positioning technique during the 21 July 2017 Kos-Bodrum (East Aegean Sea) Mw 6.6 earthquake

Arabian Journal of Geosciences ◽

10.1007/s12517-018-4140-z ◽

2018 ◽

Vol 11 (24) ◽

Author(s):

Ali Hasan Dogan ◽

Nursu Tunalioglu ◽

Bahattin Erdogan ◽

Taylan Ocalan

Keyword(s):

Precise Point Positioning ◽

Aegean Sea ◽

Positioning Technique ◽

Point Positioning

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Examining the Accuracy of Network RTK and Long Base RTK Methods with Repetitive Measurements

Journal of Sensors ◽

10.1155/2019/3572605 ◽

2019 ◽

Vol 2019 ◽

pp. 1-12 ◽

Cited By ~ 3

Author(s):

Tamer Baybura ◽

İbrahim Tiryakioğlu ◽

Mehmet Ali Uğur ◽

Halil İbrahim Solak ◽

Şeyma Şafak

Keyword(s):

Real Time ◽

Precise Point Positioning ◽

High Accuracy ◽

Base Station ◽

Network Rtk ◽

Real Time Kinematic ◽

Study Results ◽

Point Positioning

Real-time kinematic (RTK) technique is important for mapping applications requiring short measure time, the distance between rover and base station, and high accuracy. There are several RTK methods used today such as the traditional RTK, long base RTK (LBRTK), network RTK (NRTK), and precise point positioning RTK (PPP-RTK). NRTK and LBRTK are popular with the advantage of the distance, the time, and accuracy. In the present study, the NRTK and LBRTK measurements were compared in terms of accuracy and distance in a test network with 6 sites that was established between 5 and 60 km. Repetitive NRTK and LBRTK measurements were performed on 6 different days in 2015-2017-2018 and additionally 4 campaigns of repetitive static measurements were carried out in this test network. The results of NRTK and LBRTK methods were examined and compared with all relevant aspects by considering the results of the static measurements as real coordinates. The study results showed that the LBRTK and NRTK methods yielded similar results at base lengths up to 40 km with the differences less than 3 cm horizontally and 4 cm vertically.

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Enhancing real-time precise point positioning time and frequency transfer with receiver clock modeling

GPS Solutions ◽

10.1007/s10291-018-0814-y ◽

2018 ◽

Vol 23 (1) ◽

Cited By ~ 14

Author(s):

Yulong Ge ◽

Feng Zhou ◽

Tianjun Liu ◽

WeiJin Qin ◽

Shengli Wang ◽

...

Keyword(s):

Real Time ◽

Precise Point Positioning ◽

Receiver Clock ◽

Frequency Transfer ◽

Point Positioning ◽

Positioning Time

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Performance of Real-Time Precise Point Positioning

Marine Geodesy ◽

10.1080/01490419.2012.699503 ◽

2013 ◽

Vol 36 (1) ◽

pp. 98-108 ◽

Cited By ~ 23

Author(s):

Junping Chen ◽

Haojun Li ◽

Bin Wu ◽

Yize Zhang ◽

Jiexian Wang ◽

...

Keyword(s):

Real Time ◽

Precise Point Positioning ◽

Point Positioning

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GPS inter-frequency clock bias modeling and prediction for real-time precise point positioning

GPS Solutions ◽

10.1007/s10291-018-0741-y ◽

2018 ◽

Vol 22 (3) ◽

Cited By ~ 13

Author(s):

Lin Pan ◽

Xiaohong Zhang ◽

Xingxing Li ◽

Jingnan Liu ◽

Fei Guo ◽

...

Keyword(s):

Real Time ◽

Precise Point Positioning ◽

Modeling And Prediction ◽

Point Positioning

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Real-Time Precise Point Positioning Using Orbit and Clock Corrections as Quasi-Observations for Improved Detection of Faults

Journal of Navigation ◽

10.1017/s0373463317001023 ◽

2018 ◽

Vol 71 (4) ◽

pp. 769-787 ◽

Cited By ~ 7

Author(s):

Ahmed El-Mowafy

Keyword(s):

Real Time ◽

Precise Point Positioning ◽

Exclusion Process ◽

Satellite Orbit ◽

Satellite System ◽

Navigation Satellite ◽

System Service ◽

Point Positioning ◽

Predicted Values ◽

Global Navigation Satellite

Real-time Precise Point Positioning (PPP) relies on the use of accurate satellite orbit and clock corrections. If these corrections contain large errors or faults, either from the system or by meaconing, they will adversely affect positioning. Therefore, such faults have to be detected and excluded. In traditional PPP, measurements that have faulty corrections are typically excluded as they are merged together. In this contribution, a new PPP model that encompasses the orbit and clock corrections as quasi-observations is presented such that they undergo the fault detection and exclusion process separate from the observations. This enables the use of measurements that have faulty corrections along with predicted values of these corrections in place of the excluded ones. Moreover, the proposed approach allows for inclusion of the complete stochastic information of the corrections. To facilitate modelling of the orbit and clock corrections as quasi-observations, International Global Navigation Satellite System Service (IGS) real-time corrections were characterised over a six-month period. The proposed method is validated and its benefits are demonstrated at two sites using three days of data.

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