A5056245389- GNSS positioning and interference
- Geophysics and Gravity Measurements
- Astronomical Observations and Instrumentation
- Radio Astronomy Observations and Technology
- Ionosphere and magnetosphere dynamics
- Astronomy and Astrophysical Research
- Inertial Sensor and Navigation
- Historical Geography and Cartography
- Earthquake Detection and Analysis
- Atmospheric Ozone and Climate
- Advanced Frequency and Time Standards
- Arctic and Russian Policy Studies
- earthquake and tectonic studies
- Geomagnetism and Paleomagnetism Studies
- Geodetic Measurements and Engineering Structures
- Astrophysics and Cosmic Phenomena
- Soil Geostatistics and Mapping
- Cardiovascular Function and Risk Factors
- Particle Accelerators and Free-Electron Lasers
- Satellite Communication Systems
- Adaptive optics and wavefront sensing
- Wireless Communication Networks Research
- Scientific Research and Discoveries
- Seismology and Earthquake Studies
- Geographic Information Systems Studies
Goddard Space Flight Center
2005-2023
Institut d'Estudis Espacials de Catalunya
2002-2014
Max Planck Institute for Radio Astronomy
2008
Leibniz University Hannover
1995-1997
Abstract A prototype broadband geodetic very long baseline interferometry system has been implemented, and measurements of the length over approximately two years, between December 2014 January 2017, have made in process exercising system, developing operational procedures, assessing precision for new observing concept. In addition to a signal chain installing instrumentation on both 12‐m antenna at Goddard Geophysical Astrophysical Observatory 18‐m Westford Massachusetts Institute...
Geodetic VLBI (Very Long Baseline Interferometry) currently consists of two observing networks (legacy S/X and broadband VGOS). Heretofore, the have run rather independently, which is non-ideal. There been several attempts to combine observations from both at sites with co-located antennas using either conventional local-tie surveys or tie-sessions between VGOS, both. Unfortunately, number limited, hampers progress. To overcome this problem, we proposed an approach, so-called mixed-mode tie...
Water vapour is a key variable in atmospheric processes and plays crucial role motions on wide range of scales space time. The water content approximately proportional to the zenith wet delay (ZWD) which, turn, constitutes parameter geodetic microwave techniques (VLBI GPS). Apart from being determined by measurement techniques, ZWD can also be derived numerical weather prediction (NWP) models such as non-hydrostatic MM5 model hydrostatic HIRLAM model. At station Robledo de Chavela (Madrid)...
Very Long Baseline Interferometry (VLBI) is a primary space-geodetic technique for determining precise coordinates on the Earth, monitoring variable Earth rotation and orientation with highest precision, deriving many other parameters of system. The International VLBI Service Geodesy Astrometry (IVS, http://ivscc.gsfc.nasa.gov/) service Association (IAG) Astronomical Union (IAU). datasets published here are results individual sessions in form normal equations SINEX 2.0 format...
The CODATA Data Science Journal is a peer-reviewed, open access, electronic journal, publishing papers on the management, dissemination, use and reuse of research data databases across all domains, including science, technology, humanities arts. scope journal includes descriptions systems, their implementations publication, applications, infrastructures, software, legal, reproducibility transparency issues, availability usability complex datasets, with particular focus principles,...
GPS observables taken from light-weight buoys more than 80 km the reference stations have been analysed using different noise models in parameter estimation process. The time series solution of buoy positioning used to extract values oceanic variables (sea level, tides and waves) tropospheric information. These are compared with data measurements a meteorological buoy.
ABSTRACT The second realization of the International Celestial Reference Frame (ICRF2), which is current fundamental celestial reference frame adopted by Astronomical Union, based on Very Long Baseline Interferometry (VLBI) data at radio frequencies in X band and S band. European Space Agency’s Gaia mission, launched 2013 December 19, started routine scientific operations 2014 July. By scanning whole sky, it expected to observe ∼500,000 Quasi Stellar Objects optical domain an average 70...
Des reseaux geodesiques terrestres bien concus et structures permettent de materialiser les systemes reference afin prendre en compte changements mondiaux dans l'espace, le temps nouvelles technologies a un niveau inframillimetrique. Le groupe travail sur communications (Ground Networks and Communications Working Group (GN&C WG)) du Systeme global d'observation geodesique (GGOS) l'Association internationale geodesie (AIG) travaille avec services prises mesures l'AIG (l'IGS, l'ILRS, SIR,...