Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Bruno Bertrand"'
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
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a527697019225c3d2c92cd44de03de7
https://doi.org/10.1109/eftf/ifcs52194.2021.9604250
https://doi.org/10.1109/eftf/ifcs52194.2021.9604250
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,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::81dd75c22f0ac8dcf75cd2342b77c166
https://doi.org/10.1109/eftf/ifcs52194.2021.9604324
https://doi.org/10.1109/eftf/ifcs52194.2021.9604324
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ecb0e5e072de37abbab0f1879098e488
https://doi.org/10.1007/s10291-021-01090-6
https://doi.org/10.1007/s10291-021-01090-6
Autor:
Bruno Bertrand, Pascale Defraigne
This paper introduces new tests of fundamental physics by means of the analysis of disturbances on the GNSS signal propagation. We show how the GNSS signals are sensitive to a space variation of the fine structure constant $\alpha$ in a generic frame
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::141484034f573ec3048e65076b854fb4
http://arxiv.org/abs/2002.01723
http://arxiv.org/abs/2002.01723
Autor:
Pascale Defraigne, Bruno Bertrand
Publikováno v:
2019 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (EFTF/IFC).
We relate some models of new physics in the electromagnetic sector to the macroscopic ‘unit system’-free expression of Maxwell’s equations. We illustrate our method in the case of recently introduced models of domain wall dark matter. A new phe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c5dad694e5f2e94f5c36b3dfa0d2724
https://doi.org/10.1109/fcs.2019.8856117
https://doi.org/10.1109/fcs.2019.8856117
Publikováno v:
Remote Sensing, Vol 13, Iss 1164, p 1164 (2021)
Remote Sensing; Volume 13; Issue 6; Pages: 1164
Remote Sensing; Volume 13; Issue 6; Pages: 1164
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://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c81134e8ea62c0e143fd2f090a67e45
https://doi.org/10.3390/rs13061164
https://doi.org/10.3390/rs13061164
Publikováno v:
Proceedings of the 31st International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2018).
Absolute calibration procedures have been carried out for many years now, but they have only been focused on GPS signals used by the timing laboratories. In the framework of the “Accurate calibration of multi-system/multifrequency GNSS receiver cha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b0c1e5df602fe2d5406fd3eb3be5c5f
https://doi.org/10.33012/2018.16108
https://doi.org/10.33012/2018.16108
Autor:
Bruno Bertrand, Jan Govaerts
Following a novel approach, all known basic mass generation mechanisms consistent with an exact abelian U(1) gauge symmetry are shown to be related through an intricate network of dualities whatever the spacetime dimension. This equivalence which app
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::910c4ad5b61c3eb05e95b040111e882b
http://arxiv.org/abs/1807.07763
http://arxiv.org/abs/1807.07763
Autor:
Bruno Bertrand, Pascale Defraigne
Publikováno v:
2018 Conference on Precision Electromagnetic Measurements (CPEM 2018).
We formulate a new theoretical model which paves the way for methods of detection of particular types of dark matter using GNSS networks. Our model consists in a (topo-logically) massive version of Maxwell theory in a medium which admits topological
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82c266131f89956d766b76f7772c3f73
https://doi.org/10.1109/cpem.2018.8500921
https://doi.org/10.1109/cpem.2018.8500921