GRAS SAF Logo GRAS
Satellite Application Facility
Home ⇒ Deliverables ⇒ Validation Products

Validation Products

Validation products consist of summary statistical information on the reliability and quality of the sounding products. There are separate validation products for NRT (GRM-06) and Offline (GRM-14) sounding data products. Validation products include:
  • Analyses of observation delay (time differences between the observation and the start of dissemination of the level 2 sounding product to users from the SAF)
  • Analyses of availability (number of level 2 sounding products made available to users relative to the number of level 1b occultations received by the SAF from the Central Facility)
  • Analyses of refractivity quality (differences in level 2 values of refractivity against refractivity synthesised from a NWP model at the same location)
  • Analyses of temperature and humidity quality (differences in level 2 temperature and humidity profiles against equivalent NWP model values)
  • Other
These products are available in the form of:
  • Summary single or tabulated numbers
  • Graphical representations - e.g. histogram of delays, time series and geographical maps of temperature differences at selected levels.
Validation products will not be actively disseminated, but are updated and posted on a regular basis (daily for NRT, monthly for offline) on the GRAS SAF web site.

EUMETSAT's logo
GRAS SAF logo ECMWF's logo DMI's logo IEEC's logo
Copyright 2008 (C) EUMETSAT
Met Office's logo