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ITRS Combination Center at DGFI-TUM Deutsches Geodätisches Forschungsinstitut (DGFI-TUM)
Technische Universität München
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DTRF2020 Input Data

Space-geodetic techniques

The space-geodetic techniques contributing to the realization of ITRS are

  • Very Long Baseline Interferometry (VLBI),
  • Satellite Laser Ranging (SLR),
  • Global Navigation Satellite Systems (GNSS) and
  • Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS).
In preparation of the ITRS 2020 realization, the full history observation data of the four techniques was reprocessed by the corresponding IAG services of the space-geodetic techniques, the International VLBI Service (IVS) the International Laser Ranging Services (ILRS) the International GNSS Service (IGS) and the International DORIS Service (IDS).
 
 
Technique
Service
Time span
Input data type
 Input data description
GNSS
 
1994-2021.0
daily solutions provided in SINEX format
VLBI
 
1979-2021.0
session-wise NEQ provided in SINEX format
SLR
 
1984-2021.0
weekly and fortnightly loose constrained solutions provided in SINEX format
DORIS
 
1993-2021.0
weekly solutions provided in SINEX format
 
Local ties
Local ties provided for the ITRS 2020 realizations.
 

 

Non-tidal loading coefficients

provided by IERS Global Geophysical Fluid Centre, GGFC

  • including atmospheric, hydrological and oceanic loading coefficients
  • station-wise loading coefficient time series related to the center of mass (CM)                                                               of the Earth, temporal resolution: 3h
  • loading coefficients are based on the following models, see also GGFC website
    • ERA5 IB: Atmospheric loading with IB assumption from ERA5
    • TUGO-m: Oceanic loading
    • ERA5 hydro: Hydrological loading (soil-moisture + snow) from ERA5
 

Deutsches Geodätisches Forschungsinstitut

Contact:

Dr.-Ing. Manuela Seitz
manuela.seitz@tum.de

80333 München
Arcisstr.21
Tel. +49 89 23031-1294
Fax +49 89 23031-1240

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