Introduction

The purposes of monitoring the data assimilation system are to ensure the proper performance of the assimilation system and to diagnose problems with the system for future improvements. Furthermore, it provides statistics for use in the assimilation system. The statistics shown here include the bias correction and the observed-minus-simulated radiance statistics (with and without bias correction).

The sources of the departure statistics between the observed and the simulated radiance include: (i) errors in the observed data (ii) errors in the profile obtained from the forecast model, and (iii) errors in the radiative-transfer model used to compute radiance from the forecast.

Some observation numbers may have the decimal points because they are normalized by the cycle numbers.

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Summary plots

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F17 SMIS
F18 SMIS
GOES-16 ABI
HIMAWARI-9 AHI
J1 VIIRS-M
METOP-B AMSU-A
METOP-B AVHRR
METOP-B IASI
METOP-B MHS
METOP-C AMSU-A
METOP-C AVHRR
METOP-C MHS
METOP-C IASI
NOAA-15 AMSU-A
NOAA-18 AMSU-A
NOAA-18 AVHR
NOAA-19 AVHR
NOAA-19 AMSU-A
NOAA-19 HIRS/4
NOAA-19 MHS
NOAA-20 ATMS
NOAA-20 CRIS-FSR
NPP ATMS
NPP CRIS-FSR
NPP VIIRS-M