46 Result(s)

Article

Extension of the undifferenced and uncombined CDMA PPP-RTK for not-common-frequency GNSS observations

Integer ambiguity resolution enabled precise point positioning, PPP-RTK, which is becoming one of the most popular global navigation satellite system (GNSS) positioning modes. Owing to the presence of rank def...

Cheng Ke, Baocheng Zhang, Amir Khodabandeh in GPS Solutions (2024)

Article

A comparison of two PPP-RTK models: S-basis choice, network product precision, and user positioning performance

PPP-RTK combines the advantages of both precise point positioning (PPP) and real-time kinematic (RTK) techniques. While constructing PPP-RTK models based on undifferenced and uncombined observations offers app...

Pengyu Hou, Fei Ye, Yang Liu, Jiu** Zha, Chalermchon Satirapod… in GPS Solutions (2024)

Article

Optimizing ZWD estimation strategies for enhanced PPP-RTK performance

Precise Point Positioning-Real Time Kinematic (PPP-RTK), a synthesis of PPP and RTK techniques, is a highly precise positioning technique that has been extensively studied in the GNSS community. The Zenith Wet...

Rui Gao, Fei Ye, Yang Liu, Jiu** Zha, Robert Odolinski… in GPS Solutions (2024)

Article

Homogeneous PPP–RTK user positioning performance as a consequence of network integer ambiguity resolution

PPP–RTK, a synthesis of precise point positioning (PPP) and real-time kinematic (RTK) techniques, achieves fast integer ambiguity resolution-enabled positioning using, among others, satellite clocks, biases, a...

Pengyu Hou, Baocheng Zhang, Yu. V. Yasyukevich in GPS Solutions (2024)

Article

Multi-Objective Optimal Design of the Wind-Wave Hybrid Platform with the Coupling Interaction

An offshore wind-wave hybrid platform could consistently and cost-effectively supply renewable power. A multi-objective optimization process is proposed for a hybrid platform with hydrodynamic coupling interac...

Ziwei Deng, Baocheng Zhang, Yu Miao, Bo Zhao… in Journal of Ocean University of China (2023)

Article

Hong Kong–Zhuhai–Macao Bridge deformation monitoring using PPP-RTK with multipath correction method

The present study provides a suitable GNSS positioning model for long-span bridge deformation monitoring and further improves the GNSS positioning performance using the multipath mitigation technique. An ambig...

Rui Gao, Zhizhao Liu, Robert Odolinski, Qiang **g, Jiantong Zhang… in GPS Solutions (2023)

Article

Decentralized GNSS PPP-RTK

PPP-RTK, known as integer ambiguity resolution-enabled precise point positioning, requires precise satellite-related products and atmospheric corrections estimated in a global navigation satellite system (GNSS...

Pengyu Hou, Baocheng Zhang in Journal of Geodesy (2023)

Article

An ionospheric scintillation index derived from dual-frequency Doppler measurements released by geodetic GNSS receivers operating at 1 Hz

Doppler measurements are immune to cycle slips, which offers great potential for constructing the ionospheric scintillation indexes. This study proposes a new scintillation index referred to as Doppler Index ( ...

**aomin Luo, Zichun **e, João Francisco Galera Monico, Baocheng Zhang… in Journal of Geodesy (2023)

Article

Simultaneous estimation of inter-frequency clock biases and clock offsets with triple-frequency GPS data: undifferenced and uncombined methodology and impact analysis

Nowadays, multi-frequency signals have been putting forward good prospects for improving the application performances of the rapid-develo** Global Navigation Satellite Systems (GNSS). Inter-frequency clock b...

Qingsong Ai, Teng Liu, Baocheng Zhang, Jiu** Zha, Yunbin Yuan in GPS Solutions (2023)

Article

GNSS-RTK model: common-frequency versus mixed-frequency

Global navigation satellite system real-time kinematic (RTK) normally takes advantage of a common-frequency (CF) model, in which, the frequency bands in use are assumed to be the same across all satellites vis...

Cheng Ke, Pengyu Hou, Baocheng Zhang in GPS Solutions (2023)

Article

PPP-RTK: from common-view to all-in-view GNSS networks

Integer ambiguity resolution-enabled precise point positioning (PPP), otherwise known as PPP real-time kinematic (PPP-RTK), recovers the integer nature of ambiguities at a user receiver by delivering the satel...

Baocheng Zhang, Pengyu Hou, Robert Odolinski in Journal of Geodesy (2022)

Article

Estimation of ionospheric total electron content using GNSS observations derived from a smartphone

The global navigation satellite system (GNSS) measurements to determine ionospheric total electron content (TEC) are mainly derived from expensive geodetic-grade receivers, which are not conducive to high-dens...

Li Xu, Jiu** Zha, Min Li, Yunbin Yuan, Baocheng Zhang in GPS Solutions (2022)

Article

Ionosphere-weighted post-processing kinematic for airborne positioning with refined modeling of receiver phase biases and tropospheric zenith wet delays

The application of the global navigation satellite system (GNSS) in aviation effectively meets the requirements of aircraft location-based services. However, the GNSS application in airborne surveys mostly fol...

Rui Gao, Zhizhao Liu, Baocheng Zhang in GPS Solutions (2022)

Article

Multi-frequency phase-only PPP-RTK model applied to BeiDou data

Typically, navigation software processes global navigation satellite system (GNSS) phase observables along with the code observables to achieve high-precision positioning. However, the unmodeled code-related e...

Pengyu Hou, Baocheng Zhang, Yury V. Yasyukevich, Teng Liu, Jiu** Zha in GPS Solutions (2022)

Living Reference Work Entry In depth

GNSS PPP-RTK

Baocheng Zhang, Pengyu Hou in Encyclopedia of Geodesy

Article

Estimation of code observation-specific biases (OSBs) for the modernized multi-frequency and multi-GNSS signals: an undifferenced and uncombined approach

For a long time, code biases of global navigation satellite system (GNSSs) have been parameterized and presented in the differential mode, namely the commonly-known differential code biases (DCB). However, wit...

Teng Liu, Baocheng Zhang in Journal of Geodesy (2021)