Results 41 to 50 of about 25,636 (260)
MODERN TRENDS IN THE DEVELOPMENT OF TRANSPORT AND LOGISTICS SYSTEMS
Nauka ta progres transportu, 2020 Purpose. At the present stage, for the normal functioning of the economy, it is necessary to maintain a balance of economic interests for consumers of transport services and transport itself.
О. A. Hodoskina +3 more
doaj +1 more source
GLONASS Receivers Calibration [PDF]
Journal of Siberian Federal University. Engineering & Technologies, 2018 The research presents the method and the results of calibration of GLONASS receivers in the pseudorange measurement error (bias). The method is based on the application of the instruments providing traceability to national primary standards of values.
openaire +3 more sources
Global Navigation Satellite Systems - Perspectives on Development and Threats to System Operation [PDF]
TransNav, 2016 The rapid development of satellite navigation and timing technologies and the broad availability of user equipment and applications has dramatically changed the world over the last 20 years.
Krzysztof Czaplewski, Dana Goward
doaj +1 more source
Medium Earth Orbit dynamical survey and its use in passive debris removal
, 2019 The Medium Earth Orbit (MEO) region hosts satellites for navigation, communication, and geodetic/space environmental science, among which are the Global Navigation Satellites Systems (GNSS).
Rosengren, Aaron J. +3 more
core +1 more source
GPS Solutions, 2021 Three main effects from general relativity (GR) may change the geometry and orientation of artificial earth satellite orbits, i.e., the Schwarzschild, Lense–Thirring, and De Sitter effects.
K. Sośnica +4 more
semanticscholar +1 more source
Monitoring GPS‐collared moose by ground versus drone approaches: efficiency and disturbance effects
Wildlife Biology, EarlyView.Efficient wildlife management requires precise monitoring methods, for example to estimate population density, reproductive success, and survival. Here, we compared the efficiency of drone (equipped with a RGB camera) and ground approaches to detect and observe GPS‐collared female moose Alces alces and their calves. We also quantified how drone (n = 42)
Martin Mayer +8 more
wiley +1 more source
A turn-key Concept for active cancellation of Global Positioning System L3 Signal [PDF]
, 2010 We present a concept, developed at the National Astronomy and Ionosphere Center (NAIC) at Arecibo, Puerto Rico, for active suppression of Global Positioning System (GPS) signals in the 305 m dish radio receiver path prior to backend processing.
Edgar, Clyde +6 more
core +1 more source
Broadcast Ephemeris with Centimetric Accuracy: Test Results for GPS, Galileo, Beidou and Glonass
Remote Sensing, 2021 Here we test the capability of the Broadcast Ephemeris Message, in both its GPS-like (Keplerian ellipse with secular and periodic perturbations) and Glonass-like (numerical integration of a 9D state vector) formats, to reproduce a corresponding precise ...
A. Caporali, Joaquin Zurutuza
semanticscholar +1 more source
Building a Continental‐Scale Geodetic Network: The Plate Boundary Observatory (PBO)
Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.Abstract The Plate Boundary Observatory (PBO) transformed the use of geodesy in North America to study crustal deformation and plate boundary processes by establishing a continental‐scale, standardized, open‐access geodetic network. Built and operated by UNAVCO between 2003 and 2018 as part of the National Science Foundation (NSF)‐funded EarthScope ...
Emily E. Zawacki +5 more
wiley +1 more source
Precise Characterization and Multiobjective Optimization of Low Noise Amplifiers [PDF]
, 2015 Although practically all function blocks of the satellite navigation receivers are realized using the CMOS digital integrated circuits, it is appropriate to create a separate low noise antenna preamplifier based on a low noise pHEMT. Such an RF front end
Cerny, D. +7 more
core +2 more sources