Earth Orientation Parameters (EOP) Value Stream
F1 · Space Geodetic Multi-Technique Observation
EGV Level: Basis → Level 1
GNSS · SLR · DORIS networks
VLBI network (IVS)
Capabilities (avg maturity)
DORIS Data Acquisition and Storage4.0
Equipment Calibration and Maintenance3.3
GNSS Data Acquisition and Storage3.5
Ground-Based Asset Management2.5
SLR Data Acquisition and Storage3.0
VLBI Data Acquisition and Storage3.0
Weakest: Ground-Based Asset Management (2.5)
F2 · First-Mile Telemetry & Transmission
EGV Level: Basis → Level 1
Automated push to GDCs
e-VLBI transfer to correlators
Capabilities (avg maturity)
Network Operations2.0
Weakest: Network Operations (2.0)
F3 · Primary Archiving & Synchronization
EGV Level: Level 1
Global Data Centres ×3
Capabilities (avg maturity)
Data Preservation2.0
Data Quality Management2.0
Metadata Management2.0
Weakest: Data Preservation (2.0)
F4 · VLBI Correlation & Fringe-Fitting
EGV Level: Level 1 (intermediate)
VLBI correlators
Correlated group delays
Capabilities (avg maturity)
Geodetic Software and Tools2.0
Weakest: Geodetic Software and Tools (2.0)
F5 · VLBI Technique Analysis (UT1/CPO)
EGV Level: Level 1 → 2 (intermediate)
IVS Analysis Centres
VLBI-only EOP estimates
Capabilities (avg maturity)
Knowledge Management1.3
VLBI Data Processing and Analysis2.3
Weakest: Knowledge Management (1.3)
F6 · Satellite Geodetic Analysis (PM/LOD)
EGV Level: Level 1 → 2 (intermediate)
IGS Analysis Centres + ACC
ILRS and IDS analysis
Satellite-technique EOP estimates
Capabilities (avg maturity)
GNSS Data Processing and Analysis3.8
Weakest: GNSS Data Processing and Analysis (3.8)
F7a · Combination — rapid and prediction (USNO, Bulletin A)
EGV Level: Level 3 (Earth Orientation Parameters)
USNO Rapid Service & Prediction Centre
Bulletin A
Capabilities (avg maturity)
Geodetic Data Products (EOP Clocks Orbits Station Positions Gravity Models))2.8
Performance Management2.0
Reference Frames3.0
Risk Management1.0
Weakest: Risk Management (1.0)
F7b · Combination — final solutions (SYRTE, Bulletin B)
EGV Level: Level 3 (Earth Orientation Parameters)
SYRTE EOP Product Centre
Bulletin B · EOP 20 C04
Capabilities (avg maturity)
Geodetic Data Products (EOP Clocks Orbits Station Positions Gravity Models))2.8
Performance Management2.0
Reference Frames3.0
Risk Management1.0
Weakest: Risk Management (1.0)
F8 · Product Quality Assurance
EGV Level: Level 3 (pre-dissemination)
IERS Central Bureau (BKG) + Directing Board
F9 · Dissemination & User Access
EGV Level: Level 3 (validated EOP)
IERS dissemination
End users
Capabilities (avg maturity)
Data Distribution2.0
Disaster Recovery and Supply Chain Continuity1.7
Geodetic Services2.0
Weakest: Disaster Recovery and Supply Chain Continuity (1.7)
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