Zobrazeno 1 - 10
of 109
pro vyhledávání: '"Pascale Defraigne"'
Publikováno v:
Remote Sensing, Vol 13, Iss 6, p 1164 (2021)
Acquiring reliable estimates of the Antarctic Ice Sheet surface mass balance is essential for trustworthy predictions of its evolution and future contribution to sea level rise. Snow height variations, i.e., the net change of the surface elevation re
Externí odkaz:
https://doaj.org/article/475135d197974b4fbe40d9921defc20d
Publikováno v:
Sensors, Vol 19, Iss 20, p 4389 (2019)
The H2020 DEMETRA project provides short latency clock monitoring services to the time users using the Atomium precise point positioning (PPP) software developed by the Royal Observatory of Belgium. In this paper, three recent updates of the current
Externí odkaz:
https://doaj.org/article/fb755cdfd7564a5c89a48e41dba23c01
Autor:
Elisa Pinat, Pascale Defraigne
Publikováno v:
GPS Solutions. 26
Autor:
Gérard Petit, Pascale Defraigne
Publikováno v:
Metrologia. 60:025009
Global navigation satellite system (GNSS) time transfer has been used for four decades in the generation of universal time coordinated (UTC), starting with GPS in the 1980s. Calibration of GNSS receivers is then essential to ensure that time links us
Autor:
Pascale Defraigne
Publikováno v:
Encyclopedia of Geodesy ISBN: 9783319023700
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58d2d9305cc8d565595b2ac3208077a7
https://doi.org/10.1007/978-3-319-02370-0_14-1
https://doi.org/10.1007/978-3-319-02370-0_14-1
Autor:
Pacome Delva, Bruno Bertrand, Erik Schoenemann, Alexandra Sheremet, Pascale Defraigne, Aurélien Hees, Florian Dilssner, Clement Courde, Peter Wolf, Javier Ventura-Traveset, Luis Mendes, Julien Chabe
Publikováno v:
2021 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS).
Some models for Dark Matter (DM) suggest possible encounters with a period τ of macroscopic dark structures with the Earth, implying transient signatures on clocks onboard GNSS satellites. In this paper we first introduce the GASTON project, an orig
Publikováno v:
2021 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS).
The goal of this study is to analyse the stability of the hardware delays of GPS and Galileo signals in multi-GNSS stations dedicated to time transfer. We first demonstrate a significant sensitivity of these delays to external environment (multipath,
Publikováno v:
GPS Solutions. 25
We present two different approaches to broadcasting information to retrieve the GNSS-to-GNSS time offsets needed by users of multi-GNSS signals. Both approaches rely on the broadcast of a single time offset of each GNSS time versus one common time sc
Publikováno v:
GPS Solutions. 25
The combined use of multi-GNSS systems in positioning, navigation and timing requires taking into account the variable time offset between the individual system times. This offset can be determined at the user level as an additional unknown in the po
Intense solar radio bursts (SRBs) emitted at L-band frequencies are a source of radio frequency interference for Global Navigation Satellite Systems (GNSS) by inducing a noise increase in GNSS measurements, and hence degrading the carrier-to-noise de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b840ae14978240bedb352ca7457d119c
https://doi.org/10.5194/egusphere-egu2020-15904
https://doi.org/10.5194/egusphere-egu2020-15904