IERS BULLETIN A

Rapid Service/Prediction of Earth Orientation Parameters

Raw observations which contribute to IERS Bulletin A:

• Institute of Applied Astronomy VLBI
  
• GSFC VLBI
  
• USNO VLBI
  
• IVS Combination VLBI
  
• GSI VLBI Intensives
  
• GSFC VLBI Intensives
  
• USNO VLBI Intensives
  

• ILRS Series A SLR
  
• Institute of Applied Astronomy SLR
  
• Russian Mission Control Center SLR
  

• International GPS Service for Geodynamics Final Combined Solution
  
• International GPS Service for Geodynamics Rapid Combined Solution (only most recent data used)
  
• International GPS Service for Geodynamics Ultra Combined Solution (only most recent data used)
  
• USNO GPS "UT" Solution
  
• EMR GPS "UT" Solution
  

• National Centers for Environmental Prediction AAM
  

Systematic corrections applied in the combination:

Additional information: