A5086039675- Geophysics and Gravity Measurements
- Geomagnetism and Paleomagnetism Studies
- GNSS positioning and interference
- Geophysical and Geoelectrical Methods
- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Statistical and numerical algorithms
- Computational Physics and Python Applications
- Inertial Sensor and Navigation
- Methane Hydrates and Related Phenomena
- Geological formations and processes
- Astro and Planetary Science
- Planetary Science and Exploration
- Geological Modeling and Analysis
- Astronomical Observations and Instrumentation
- Geological and Geophysical Studies
- Climate variability and models
- Cosmology and Gravitation Theories
- Atmospheric and Environmental Gas Dynamics
- Scientific Research and Discoveries
- Reservoir Engineering and Simulation Methods
- Spacecraft and Cryogenic Technologies
- Pulsars and Gravitational Waves Research
- Historical Geography and Cartography
- earthquake and tectonic studies
Czech Academy of Sciences, Astronomical Institute
2011-2023
Kiel University
2019-2022
European Space Research Institute
2017-2019
Research Institute of Geodesy, Topography and Cartography
2015-2016
University of West Bohemia
2013-2016
Czech Academy of Sciences
2010-2015
Czech Technical University in Prague
2010-2012
Abstract The Gravity field and steady-state Ocean Circulation Explorer (GOCE) satellite aimed at determining the Earth’s mean gravity field. GOCE delivered gradients containing directional information, which are complicated to use because of their error characteristics they given in a rotating instrument frame indirectly related Earth. We compute grids 225 km 255 altitude above reference ellipsoid corresponding nominal lower orbit phases respectively find that may contain additional...
Abstract. Although the knowledge of gravity Earth has improved considerably with CHAMP, GRACE, and GOCE (see appendices for a list abbreviations) satellite missions, geophysical community identified need continued monitoring time-variable component purpose estimating hydrological glaciological yearly cycles long-term trends. Currently, GRACE-FO satellites are sole dedicated provider these data, while previously GRACE mission fulfilled that role 15 years. There is data gap spanning from July...
Abstract. The AlpArray Gravity Research Group (AAGRG), as part of the European program, focuses on compilation a homogeneous surface-based gravity data set across Alpine area. In 2017 10 countries in realm agreed to contribute with for new field an area spanning from 2 23∘ E and 41 51∘ N. This relies existing national databases and, Ligurian Adriatic seas, shipborne Service Hydrographique et Océanographique de la Marine Bureau Gravimétrique International. Furthermore, Ivrea zone Western...
Since the launch of ESA Swarm satellites in 2014, GPS data has been used to monitor monthly changes Earth’s gravity field at a spatial resolution larger than 1,500 km (half-wavelength). We have chosen processing strategies that do not rely on assumptions temporal and correlations, producing models are independent GRACE GRACE-FO data. team composed Astronomical Institute University Bern, Czech Academy Sciences, Delft Technology, Geodesy Graz School Earth Sciences Ohio State...
It is of great interest to numerous geophysical studies that the time series global gravity field models derived from Gravity Recovery and Climate Experiment (GRACE) data remains uninterrupted after end this mission. With in mind, some institutes have been spending efforts estimate alternative sources gravimetric data. This study focuses on solutions estimated Swarm positioning system (GPS) data, produced by Astronomical Institute University Bern, (ASU, Czech Academy Sciences) Geodesy (IfG,...
Abstract Since 2002 Gravity Recovery and Climate Experiment (GRACE) provides monthly gravity fields from K-band ranging (KBR) between two GRACE satellites. These KBR monthlies have enabled the global observation of time-varying Earth mass signal at a regional scale (about 400 km resolution). Apart KBR, solutions can be computed onboard GPS data. The newly reprocessed 13 yr data are shown to yield correct time-variable (seasonality, trends, interannual variations) spatial resolution 1300...
Abstract. In 2008 the new Earth Gravitational Model (EGM2008) was released. It contains a complete set of spherical harmonic coefficients Earth's gravitational potential (Stokes parameters) to degree 2190 and order 2159 selected orders 2190, that can be used for evaluation various quantities with both unprecedented accuracy high spatial resolution. Two such quantities, gravity anomaly second-order radial derivative disturbing potential, were computed over areas known impact craters. The...
With satellite radar altimetry, the oceanic geoid can be determined with high precision and resolution. Double differentiation of these data along altimeter ground tracks yields along-track gravity gradients that used to compute vertical at track crossovers. One way counteract noise amplification due is smooth using smoothing splines. Although effect has been investigated some extent, associated systematic errors have not assessed so far. Here we show cannot neglected. In particular, found...
Abstract. Several alternative gravity forward modelling methodologies and associated numerical codes with their own advantages limitations are available for the solid Earth community. With upcoming state-of-the-art lithosphere density models accurate global field data sets, it is vital to understand opportunities of various approaches. In this paper, we discuss four widely used techniques: spherical harmonics (GSH), tesseroid integration (TESS), triangle (TRI), hexahedral (HEX). A constant...
Abstract. Although the knowledge of gravity Earth has improved considerably with CHAMP, GRACE and GOCE satellite missions, geophysical community identified need for continued monitoring time-variable component purpose estimating hydrological glaciological yearly cycles long-term trends. Currently, GRACE-FO satellites are sole dedicated provider these data, while previously mission fulfilled that role 15 years. There is a data gap spanning from July 2017 to May 2018 between end start...
gradiometer on board) to the 16:1 resonance. To avoid decrease in A, we have choose orbit such a way that orderB of lowest-order resonance, which will occur, be higher than highest degree Lmax spherical harmonic expansion potential already known for particular body. For Earth, is now 150 [European improved gravitymodel theEarth by new techniques (EIGEN-5S)] satellite-only solutions and 2190