Results 61 to 70 of about 32,795 (346)

PPP-RTK with Rapid Convergence Based on SSR Corrections and Its Application in Transportation

open access: yesRemote Sensing, 2023
Real-time Kinematic (RTK) positioning provides centimeter-level positioning accuracy within several seconds, but it has to rely on a nearby base station.
Xiangdong An   +2 more
doaj   +1 more source

A Decentralized Processing Schema for Efficient and Robust Real-time Multi-GNSS Satellite Clock Estimation [PDF]

open access: yes, 2019
Real-time multi-GNSS precise point positioning (PPP) requires the support of high-rate satellite clock corrections. Due to the large number of ambiguity parameters, it is difficult to update clocks at high frequency in real-time for a large reference ...
Ge, Maorong   +4 more
core   +1 more source

PERFORMANCE ANALYSIS OF WEB-BASED RELATIVE AND PRECISE POINT POSITIONING TECHNIQUES WITH DIFFERENT SATELLITE VISIBILITY CONDITIONS [PDF]

open access: yes, 2020
The Global Navigation Satellite System (GNSS) is used for precise positioning applications, such as surveying and geodesy. The aim of the present work is to evaluate the effectiveness of web-based relative positioning (RP) and precise point positioning ...
Albayrak, Müge   +2 more
core   +4 more sources

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

open access: yesHepatology 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   +6 more
wiley   +1 more source

Characterization of a 450-km Baseline GPS Carrier-Phase Link using an Optical Fiber Link [PDF]

open access: yes, 2015
A GPS carrier-phase frequency transfer link along a baseline of 450 km has been established and is characterized by comparing it to a phase-stabilized optical fiber link of 920 km length, established between the two endpoints, the Max-Planck-Institut f ...
Bauch, Andreas   +8 more
core   +2 more sources

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

open access: yesSatellite 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   +4 more
doaj   +1 more source

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

open access: yesRemote 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   +8 more
doaj   +1 more source

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

open access: yesSatellite 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

Performance analysis of real-time and post-mission kinematic precise point positioning in marine environments

open access: yesGeodesy and Geodynamics, 2020
This article focuses on the performance analysis of both real-time and post-mission kinematic precise point positioning (PPP) in challenging marine environments.
Serdar Erol   +3 more
doaj   +1 more source

An Effective Multi-Cue Positioning System for Agricultural Robotics [PDF]

open access: yes, 2018
The self-localization capability is a crucial component for Unmanned Ground Vehicles (UGV) in farming applications. Approaches based solely on visual cues or on low-cost GPS are easily prone to fail in such scenarios.
Grisetti, Giorgio   +4 more
core   +2 more sources

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