Results 61 to 70 of about 162,805 (182)
IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.This article proposes a feedback node aided distributed spoofing (FNA‐DS) system, enabling flexible implementation of distributed spoofing. Field experiments using a self‐developed distributed spoofing prototype validate the FNA‐DS system's effectiveness and expose limitations in existing direction of arrival based anti‐spoofing techniques.
Minghan Zhong +3 more
wiley +1 more source
The international global navigation satellite systems service (IGS): development and achievements [PDF]
, 2018 Since 21 June 1992 the International GPS Service (IGS), renamed International GNSS Service in 2005, produces and makes available uninterrupted time series of its products, in particular GPS observations from the IGS Global Network, GPS orbits, Earth ...
Beutler, Gerhard +2 more
core
Detection of elusive Radio and Optical emission from Cosmic-ray showers in the 1960s
, 2011 During the 1960s, a small but vibrant community of cosmic ray physicists, pioneered novel optical methods of detecting extensive air showers (EAS) in the Earth's atmosphere with the prime objective of searching for point sources of energetic cosmic gamma-
Fegan, David J.
core +1 more source
A Satellite Drift Scan Approach for Establishing the Pointing Model of Radio Telescopes
Advances in Astronomy, Volume 2025, Issue 1, 2025.In the era of large satellite constellations, there are more than 1000 satellites in orbit. While the signals from these satellites may pose a risk of radio frequency interference (RFI) to radio telescopes, they also present a potential advantage by serving as high‐spatial‐density pointing references for radio telescopes.
Ye Yuan +4 more
wiley +1 more source
Določitev absolutnega položaja GPS-sprejemnika iz kodnih opazovanj : Absolute GPS Positioning from Code Observations [PDF]
Geodetski Vestnik, 2005 In the article we present the single point positioning procedures from pseudoranges for obtaining the absolute position of the GPS antenna and its clock offset.
Bojan Stopar +1 more
doaj
Networked differential GPS system [PDF]
, 1994 An embodiment of the present invention relates to a worldwide network of differential GPS reference stations (NDGPS) that continually track the entire GPS satellite constellation and provide interpolations of reference station corrections tailored for ...
Kalafus, Rudolph M. +3 more
core +1 more source
BeiDou satellite-induced code pseudorange variations: diagnosis and therapy
GPS Solutions, 2015 Code pseudorange measurements of the Chinese GNSS BeiDou reveal variations which result in code–phase divergences of more than 1 m. We have analyzed these delay variations based on observation data of the International GNSS Service and its Multi-GNSS ...
L. Wanninger, S. Beer
semanticscholar +1 more source
Robust factor graph optimisation method for shipborne GNSS/INS integrated navigation system
IET Radar, Sonar &Navigation, Volume 18, Issue 5, Page 782-798, May 2024.An adaptive factor based on pseudorange residual judgement is proposed to improve the accuracy of ship‐borne robust factor graph optimisation integrated navigation method. Using the historical information in the sliding window to estimate the occluded satellite signal.
Yuan Hu, Haozheng Li, Wei Liu
wiley +1 more source
A comparative study of Runge-Kutta method orders for computing GLONASS broadcast orbits
Boletim de Ciências Geodésicas: The determination of the position and velocity of the GLONASS user’s begins with the GLONASS satellite’s orbit computation. In this paper, using the positions and velocities of GLONASS satellites given in the broadcast ephemerides file every 30 minutes
S. Medjahed
semanticscholar +1 more source
Space Weather, Volume 22, Issue 4, April 2024.Abstract This study applies the zero‐differenced integer ambiguity method, named PPP‐Fixed, to extract real‐time ionospheric data and eliminate the latencies of rapid/final Global Ionosphere Maps (GIMs). The PPP‐Fixed method is also used to derive ionospheric data for post‐processed GIM generation, named SGG Post‐GIM, combined with low earth orbit ...
Jun Chen +5 more
wiley +1 more source