Results 51 to 60 of about 72,914 (171)

Luontopohjaisten ratkaisujen käsikirja [PDF]

, 2019
ThinkNature project funded by the EU Horizon 2020 research and innovation programme under grant agreement No. 730338Nature-based solutions (NBS) are actions inspired by, supported by, or copied from nature, that deploy various natural features and ...
Lehvävirta, Susanna, Mesimäki, Marja, Thinknature   +2 more
core   +1 more source

Comprehensive Evaluation of Data-Related Factors on BDS-3 B1I + B2b Real-Time PPP/INS Tightly Coupled Integration

Remote Sensing, 2022
Owing to the developments of satellite-based and network-based real-time satellite precise products, the Precise Point Positioning (PPP) technique has been applied far and wide, especially since the PPP-B2b service was provided by the third-generation ...
Junyao Kan, Zhouzheng Gao, Qiaozhuang Xu, Ruohua Lan, Jie Lv, Cheng Yang   +5 more
doaj   +1 more source

A Continuous B2b-PPP Model Considering Interruptions in BDS-3 B2b Orbits and Clock Corrections as Well as Signal-in-Space Range Error Residuals

Remote Sensing
In 2020, BDS-3 began broadcasting high-precision positioning correction products through B2b signals, effectively addressing the limitations of ground-based augmentation.
Rui Shang, Zhenhao Xu, Chengfa Gao, Xiaolin Meng, Wang Gao, Qi Liu   +5 more
doaj   +1 more source

Modelling and Assessment of Single-Frequency PPP Time Transfer with BDS-3 B1I and B1C Observations

Remote Sensing, 2022
BDS-3 is now providing global positioning, navigation and timing (PNT) services. BDS-3 has new B1C, B2a and B2b signals compared to BDS-2. This work presents two single-frequency (SF) PPP time transfer models using BDS-3, B1C and B1I observations, and ...
Shengli Wang, Yulong Ge, Xiaolin Meng, Pengli Shen, Kaidi Wang, Fuyang Ke   +5 more
doaj   +1 more source

GNSS Real-Time Kinematic Positioning [PDF]

This open access book presents the high-precision Real-Time Kinematic (RTK) positioning technique of global navigation satellite systems, including its development, principle, implementation, applications and recent innovations. As the highlights of this
Li, Bofeng, Miao, Weikai, Zhang, Zhetao
core   +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

Study on the accuracy of Multi-GNSS PPP for different observing sessions time spans using PRIDE PPP-AR open-source software package [PDF]

The Precise Point Positioning (PPP) approach to GNSS observables is widely used for processing data from permanent stations, providing highly precise coordinates. However, the performance of PPP for observation sessions shorter than 24 h has not yet
Cappuccio, Matteo, Gandolfi, Stefano, Poluzzi, Luca, Tavasci, Luca   +3 more
core   +1 more source

Flatness constraints in the estimation of GNSS satellite antenna phase center offsets and variations [PDF]

Accurate information on satellite antenna phase center offsets (PCOs) and phase variations (PVs) is indispensable for high-precision geodetic applications.
Duan, Bingbing, Hugentobler, Urs, Montenbruck, Oliver, Steigenberger, Peter, Villiger, Arturo   +4 more
core   +1 more source

A Novel Robust High‐Precision Ionospheric Delay Modeling for PPP‐RTK Using Crowdsourced Data

Space Weather, Volume 24, Issue 2, February 2026.
Abstract The performance of PPP‐RTK is critically dependent on the quality of ionospheric corrections derived from a reference network. While the proliferation of mass‐market Global Navigation Satellite System (GNSS) devices offers a promising crowdsourcing opportunity to densify or replace this infrastructure, it introduces the formidable challenge of
Bo Wang, Jiaxi Zhu, Zhilu Wu, Dejin Zhang, Zhao Li, Minsi Ao, Shengfeng Gu   +6 more
wiley   +1 more source

Low-Cost IMU and Odometer Tightly Augmented PPP-B2b-Based Inter-Satellite Differenced PPP in Urban Environments

Remote Sensing, 2022
Since 23 June 2020, BDS-3 has been entirely operated and obtained the ability of global PNT (Positioning, Navigation, and Timing) services. Afterward, real-time Precise Point Positioning (PPP) service is available in China’s surrounding areas via BDS-3 ...
Yu Min, Zhouzheng Gao, Jie Lv, Ruohua Lan, Qiaozhuang Xu, Cheng Yang   +5 more
doaj   +1 more source