Results 51 to 60 of about 549,143 (317)

Evaluation of Kinematic Precise Point Positioning Convergence with an Incremental Graph Optimizer [PDF]

2018 IEEE/ION Position, Location and Navigation Symposium (PLANS), 2018
Estimation techniques to precisely localize a kinematic platform with GNSS observables can be broadly partitioned into two categories: differential, or undifferenced. The differential techniques (e.g., real-time kinematic (RTK)) have several attractive properties, such as correlated error mitigation and fast convergence; however, to support a ...
arxiv   +1 more source

Real-time GNSS precise point positioning with smartphones for vehicle navigation

Satellite Navigation, 2022
The availability of raw Global Navigation Satellite System (GNSS) measurements from Android smart devices gives new possibilities for precise positioning solutions, e.g., Precise Point Positioning (PPP).
Zishen Li, Liang Wang, Ningbo Wang, Ran Li, Ang Liu   +4 more
doaj   +1 more source

BDS-3/GPS/Galileo OSB Estimation and PPP-AR Positioning Analysis of Different Positioning Models

Remote Sensing, 2022
With the completion of the BeiDou Global Navigation Satellite System (BDS-3), the multi-system precise point positioning ambiguity resolution (PPP-AR) has been realized. The satellite phase fractional cycle bias (FCB) is a key to the PPP-AR.
Bo Li, Jinzhong Mi, Huizhong Zhu, Shouzhou Gu, Yantian Xu, Hu Wang, Lijun Yang, Yibiao Chen, Yuqi Pang   +8 more
doaj   +1 more source

The Bias in PPP-B2b Real-Time Clock Offset and the Strategy to Reduce It

Remote Sensing, 2022
Precise point positioning can provide accurate coordinates to users without reference stations, and the high-precision real-time clock offset product is necessary for real-time precise point positioning application.
Jinhuo Liu, Chengpan Tang, Shanshi Zhou, Xiaogong Hu, Yufei Yang, Jianhua Yang, Yuchen Liu   +6 more
doaj   +1 more source

GICI-LIB: A GNSS/INS/Camera Integrated Navigation Library [PDF]

, 2023
Accurate navigation is essential for autonomous robots and vehicles. In recent years, the integration of the Global Navigation Satellite System (GNSS), Inertial Navigation System (INS), and camera has garnered considerable attention due to its robustness and high accuracy in diverse environments.
arxiv   +1 more source

Kinematic Precise Point Positioning Using Multi-Constellation Global Navigation Satellite System (GNSS) Observations

ISPRS International Journal of Geo-Information, 2017
Multi-constellation global navigation satellite systems (GNSSs) are expected to enhance the capability of precise point positioning (PPP) by improving the positioning accuracy and reducing the convergence time because more satellites will be available ...
Xidong Yu, Jingxiang Gao
doaj   +1 more source

PPP models and performances from single- to quad-frequency BDS observations

Satellite Navigation, 2020
Nowadays, China BeiDou Navigation Satellite System (BDS) has been developed well and provided global services with highly precise positioning, navigation and timing (PNT) as well as unique short-message communication, particularly global system (BDS-3 ...
Shuanggen Jin, Ke Su
doaj   +1 more source

Noninvasive tests for nonalcoholic fatty liver disease in a multi‐ethnic population: The HELIUS study

Hepatology Communications, EarlyView., 2022
Abstract Nonalcoholic fatty liver disease (NAFLD) is increasing in prevalence and severity globally, prompting noninvasive testing, yet limited data exist on noninvasive liver tests (NITs) including transient elastography (TE) in ethnically diverse populations.
Anne‐Marieke van Dijk, Yasaman Vali, Anne Linde Mak, Henrike Galenkamp, Max Nieuwdorp, Bert‐Jan van den Born, Adriaan Georgius Holleboom   +6 more
wiley   +1 more source

Out‐of‐Pocket expenditure and patient experience of care under‐Indonesia's national health insurance: A cross‐sectional facility‐based study in six provinces

The International Journal of Health Planning and Management, Volume 37, Issue S1, Page 79-100, December 2022., 2022
Abstract Background Low‐ and middle‐income countries worldwide are striving to achieve universal health coverage (UHC), frequently through expansion of statutory health insurance schemes. However, oftentimes evidence is lacking on progress towards quality patient‐centred care and out‐of‐pocket expenditure (OOPE), particularly for poor population groups.
Viktoria Couturier, Swati Srivastava, Budi Hidayat, Manuela De Allegri   +3 more
wiley   +1 more source

Toward a harmonized methodology to analyze field side effects of two pesticide products on earthworms at the EU level

Integrated Environmental Assessment and Management, Volume 19, Issue 1, Page 254-271, January 2023., 2023
Abstract Before plant protection product (PPP) marketing authorization, a risk assessment for nontarget soil organisms (e.g., earthworms) is required as part of Regulation (EC) No. 1107/2009. Following a stepwise approach, higher tier earthworm field studies are needed if they cannot demonstrate low long‐term risk based on laboratory studies.
Franck Brulle, Joël Amossé, Sylvain Bart, Arnaud Conrad, Vanessa Mazerolles, Sylvie Nélieu, Isabelle Lamy, Alexandre Péry, Céline Pelosi   +8 more
wiley   +1 more source