STAR Cal/Val Systems

- GNSS Radio Occultation
- CRTM Coeff Repository
  (NOAA Internal)
- OSE/OSSE repository
  (NOAA Internal)
- GDAS monitoring for NWP

Polar-orbiting Satellites

Geostationary Satellites

International Collaboration

Spire Products

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Spire Neutral Atmosphere Bending Angle Data

https://gpsmet.umd.edu/star_gnssro/data/spire/nrt/atmPrf/ (Daily NetCDF Tar files)
https://gpsmet.umd.edu/star_gnssro/data/spire/nrt/bfrPrf/(Daily BUFR Tar files)