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Created by
Roca Flurin, last updated by Soja Benedikt on Feb 23, 2026
1 minute read
Data files for VLBI analysis:
- Thermal deformation and axis offsets (antenna-info.txt)
- Official version: https://doi.org/10.48436/b00xg-3vg05
- Local backup: antenna-info.txt
- Contact person: Axel Nothnagel
- VLBI station axis offsets in Calc/Solve input format: gsfc_itrf2020_v2025Oct03.axo
- October 2025 update: SEJONG axis offset consistent with antenna-info.txt, version 2025-09-17+
- Contact persons: John Gipson, Benedikt Soja
- Gravitational deformation file: gravity_deform_model_v2025-09-28.txt
- September 2025 update: added HOBART26
- Contact persons: John Gipson, Benedikt Soja
- IVS source name and translation table (IVS_SrcNamesTable.txt)
- Official version: https://cddis.nasa.gov/archive/vlbi/gsfc/ancillary/solve_apriori/IVS_SrcNamesTable.txt
- Local backup: IVS_SrcNamesTable.txt
- Contact person: Karine Le Bail
- VLBI station characteristics: antenna.dat
- VLBI station eccentricities: ECCDAT_v2019Dec19.ecc (2019-12-19)
- VLBI station and source a priori coordinates for Calc 11: blokq.c11.dat
- JPL DE421 Ephemerides (binary): DE421_little_Endian
- Leap second file: ut1ls.dat
- Binary UT1/PM Mark IV data file: ut1pm.dat
- Mean gradient file: gsfc_dao_gmao.mgr
- Discontinuities due to earthquakes and antenna repairs in SINEX format: discontinuities.txt (courtesy of Axel Nothangel)
- Mark III/IV VLBI Sessions after 1984.0 that are not suitable for reliable EOP Determination: eop_exclusion.txt (courtesy of Axel Nothangel)
- Tectonic plates of VLBI stations: sitpl.dat
Height of pressure sensor for VLBA sites: VLBA_wx_pressure_sensor_elevations.xlsx
A priori coordinates and EOP
- ITRF2020-u2023: https://itrf.ign.fr/en/solutions/itrf2020-u2023
- ICRF3: https://hpiers.obspm.fr/icrs-pc/icrf/index.php
- EOP 20-u23 C04: https://datacenter.iers.org/products/eop/long-term/
Tropospheric mapping functions for VLBI analysis:
| Data | Description | Maintained by |
|---|---|---|
| VMF1 Data | VMF1 mapping function data at 6 hour intervals. Starting epoch 1979.01.01 | TU Wien |
| VMF3 Data | VMF3 mapping function data at 6 hour intervals. Starting epoch 2008.01.01 | TU Wien |
Other files:
- IVS network station codes, CDP numbers, and DOMES numbers (ns-codes.txt)
- Official version: https://cddis.nasa.gov/archive/vlbi/ivscontrol/ns-codes.txt
- Local backup: ns-codes.txt
- Analysis Center solution codes (ac-codes.txt)
- Official version: https://cddis.nasa.gov/archive/vlbi/ivscontrol/ac-codes.txt
- Local backup: ac-codes.txt
- Data Center file conventions:
- Current file conventions (2023 onward)
- Previous file conventions (until end of 2022)
History:
- updated all files with station names to use underscores
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