Results 31 to 40 of about 963 (157)

PPP–RTK functional models formulated with undifferenced and uncombined GNSS observations

Satellite Navigation, 2022
Technique PPP–RTK combines the advantages of both the Precise Point Positioning (PPP) and the Real-Time Kinematic (RTK) positioning. With the emergence of multi-frequency Global Navigation Satellite System (GNSS) observations, it is preferable to ...
Baocheng Zhang, Pengyu Hou, Jiuping Zha, Teng Liu   +3 more
doaj   +1 more source

Almost-Instantaneous PPP-RTK Without Atmospheric Corrections

, 2022
AbstractAmbiguity resolution enabled precise point positioning (PPP-RTK) can provide fast, potentially even instantaneous, centimeter-level positioning results, given that the phase ambiguities are correctly resolved. Without external ionospheric corrections, a time-to-first-fix the ambiguities of around 30 min is often reported for GPS-only solutions.
Andreas Brack, Benjamin Männel, Harald Schuh   +2 more
openaire   +4 more sources

A Consistent Regional Vertical Ionospheric Model and Application in PPP-RTK Under Sparse Networks

Navigation, 2023
Ionospheric augmentation is one of the most important dependences of PPP-RTK. Because of the dispersive features of the ionosphere, the ionospheric information is usually coupled with satellite- and receiver-related biases.
Sijie Lyu, Yan Xiang, Tiantian Tang, Ling Pei, Wenxian Yu, Trieu-Kien Truong   +5 more
doaj   +1 more source

Satellite-Clock Modeling in Single-Frequency PPP-RTK Processing [PDF]

Journal of Surveying Engineering, 2018
The real-time kinematic precise point positioning (PPP-RTK) technique enables integer ambiguity resolution by providing singlereceiver users with information on the satellite phase biases next to the standard PPP corrections. Using undifferenced and uncombined observations, rank deficiencies existing in the design matrix need to be eliminated to ...
Kan Wang, Amir Khodabandeh, Peter J. G. Teunissen, Nandakumaran Nadarajah   +3 more
openaire   +3 more sources

A Multi-Frequency Galileo PPP-RTK Convergence Analysis with an Emphasis on the Role of Frequency Spacing

Remote Sensing, 2021
The single-receiver integer ambiguity resolution-enabled variant of precise point positioning (PPP), namely PPP-RTK, has proven to be crucial in reducing the long convergence time of PPP solutions through the recovery of the integerness of the user ...
Dimitrios Psychas, Peter J. G. Teunissen, Sandra Verhagen   +2 more
doaj   +1 more source

Assessment of the Feasibility of PPP-B2b Service for Real-Time Coseismic Displacement Retrieval

Remote Sensing, 2021
Traditional coseismic displacement retrieval generally uses real-time kinematic (RTK) and precise point positioning (PPP) services. However, both RTK and real-time PPP need a network link to transmit the corrected data.
Hao Yang, Shengyue Ji, Duojie Weng, Zhenjie Wang, Kaifei He, Wu Chen   +5 more
doaj   +1 more source

Preliminary performance analysis using the PPP-RTK service of the National Land and Mapping Center in Taiwan [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Low-cost navigation and positioning systems have become a prominent research field in recent years. In the autonomous vehicle domain, real-time accurate vehicle position determination within lanes is essential for high-level autonomous driving. Regarding
J.-Y. Lin, C.-H. Chu, F.-Y. Chu, K.-W. Chiang, M.-L. Tsai   +4 more
doaj   +1 more source

The Performance of Three-Frequency GPS PPP-RTK with Partial Ambiguity Resolution

Atmosphere, 2022
The correct ambiguity resolution of real-time kinematic precise point positioning (PPP-RTK) plays an essential role in achieving fast, reliable, and high-precision positioning.
Zhongbao Yan, Xiaohong Zhang
doaj   +1 more source

GNSS rapid precise point positioning enhanced by low Earth orbit satellites

Satellite Navigation, 2023
The Low Earth Orbit (LEO) satellites can be used to effectively speed up Precise Point Positioning (PPP) convergence. In this study, 180 LEO satellites with a global distribution are simulated to evaluate their contribution to the PPP convergence.
Ju Hong, Rui Tu, Pengfei Zhang, Rui Zhang, Junqiang Han, Lihong Fan, Siyao Wang, Xiaochun Lu   +7 more
doaj   +1 more source

Assessment of Multi-Frequency PPP Ambiguity Resolution Using Galileo and BeiDou-3 Signals

Remote Sensing, 2021
From network RTK to PPP-RTK, it is highly expected that high-precision positioning within a few minutes can be achieved with a sparse reference network.
Jiang Guo, Qiyuan Zhang, Guangcai Li, Kunlun Zhang   +3 more
doaj   +1 more source