Results 31 to 40 of about 340,630 (342)

Automated time activity classification based on global positioning system (GPS) tracking data

Environmental Health, 2011
BackgroundAir pollution epidemiological studies are increasingly using global positioning system (GPS) to collect time-location data because they offer continuous tracking, high temporal resolution, and minimum reporting burden for participants. However,
Jun Wu, Chengsheng Jiang, Douglas Houston, D. Baker, R. Delfino   +4 more
semanticscholar   +1 more source

Evaluation of Point Positioning Using the Global Positioning System and the Quasi-Zenith Satellite System as Measured from South Korea [PDF]

Journal of Astronomy and Space Sciences, 2015
The Quasi-Zenith Satellite System (QZSS), a dedicated regional Japanese satellite system currently under development, was designed to complement the performance of the Global Positioning System (GPS).
Byung-Kyu Choi, Chang-Hyun Cho, Jung Ho Cho   +2 more
doaj   +1 more source

BDS/GPS/UWB Adaptively Robust EKF Tightly Coupled Navigation Model Considering Pedestrian Motion Characteristics

Remote Sensing, 2022
In the indoor and outdoor transition area, due to its poor availability in a complex positioning environment, the BDS/GPS SPP (single-point positioning by combining BeiDou Navigation Satellite System (BDS) and Global Positioning System (GPS)) is unable ...
Jian Zhang, Jian Wang, Ximin Cui, Debao Yuan   +3 more
doaj   +1 more source

Maritime DGPS System Positioning Accuracy as a Function of the HDOP in the Context of Hydrographic Survey Performance

Remote Sensing, 2022
The Differential Global Positioning System (DGPS) is a marine navigation system operating at frequencies of 283.5–325 kHz, which is now the primary method for locating vessels in coastal shipping, as well as hydrography and mapping systems worldwide. Its
Cezary Specht
doaj   +1 more source

GPS + BDS Network Real-Time Differential Positioning Using a Position Domain Estimation Method

Remote Sensing, 2019
The network real-time differential positioning technique is a good choice for meter and sub-meter level’s navigation. More attention has been paid to the Global Positioning System (GPS) and GPS + GLONASS (GLObal NAvigation Satellite System) network
Jianhui Cui, Rui Yan, Chenlong Deng, Weiming Tang, Xuan Zou, Mingxing Shen, Qian Liu, Yawei Wang, Yangyang Li   +8 more
doaj   +1 more source

The evaluation of the positioning accuracy of the EGNOS and DGPS systems based on the long-term measurements in the years 2006–2014

Polish Cartographical Review, 2015
The DGPS (Differential GPS) and EGNOS (European Geostationary Navigation Overlay Service) systems belong to a group of systems supporting the global satellite system GPS (Global Positioning System).
Specht Mariusz
doaj   +1 more source

A New Indoor Positioning System Architecture Using GPS Signals

Sensors, 2015
The pseudolite system is a good alternative for indoor positioning systems due to its large coverage area and accurate positioning solution. However, for common Global Positioning System (GPS) receivers, the pseudolite system requires some modifications ...
Rui Xu, Wu Chen, Ying Xu, Shengyue Ji
doaj   +1 more source

Lived and Care Experiences of Chronic Musculoskeletal Shoulder Pain in Australian Adults: A Qualitative Study

Arthritis Care &Research, EarlyView.
Objective Australian evidence on lived and care experiences of chronic musculoskeletal shoulder pain (CMSP), irrespective of disorder classification or disease, is limited. However, such evidence is important for person‐centered care and informing local service pathways and care guidelines or standards.
Sonia Ranelli, Joanne E. Jordan, Ilana N. Ackerman, Alison Thorpe, Jennifer G. Persaud, Linda J. Woodhouse, Jason Chua, Ben Horgan, Andrew M. Briggs   +8 more
wiley   +1 more source

An Efficient Jarratt-Type Iterative Method for Solving Nonlinear Global Positioning System Problems

Axioms, 2023
The global positioning system (GPS) is a satellite navigation system that determines locations. Whenever the baseline satellites are serviced or deactivated, the Space Force often flies more than 24 GPS satellites to maintain coverage.
Saima Yaseen, Fiza Zafar, Hamed H. Alsulami   +2 more
doaj   +1 more source

A Graphical Approach to GPS Software-Defined Receiver Implementation [PDF]

, 2013
Global positioning system (GPS) software-defined receivers (SDRs) offer many advantages over their hardwarebased counterparts, such as flexibility, modularity, and upgradability.
Bhatti, Jahshan A., Humphreys, Todd E., Kassas, Zaher M.   +2 more
core   +1 more source