Operational Data Checking

An automatic data checking system has been implemented at ECMWF to trigger warnings in case of anomalies affecting the quality or the availability of the data assimilated by the model. Selected statistical parameters (number of observations, bias correction, and mean bias-corrected background, analysis departures and probability of gross error) are checked against an expected range. An appropriate alert message (including a time series plot) is generated if statistics are outside the specified ranges. A severity level (slight, considerable, severe) is assigned to each message depending on how far statistics are from the expected values. Two kinds of ranges are used by the automatic checking: Soft and Hard limits. Soft limits are updated automatically using statistics from the last twenty days (extremes are excluded during this process). Hard limits are adjusted manually when required.

Currently, the automatic checking is limited to data passing through the minimisation process (including VarBC passive data). It's being applied twice a day to the delayed cut-off 4D-VAR cycles (00 and 12) and four times a day to the early delivery assimilation system (00,06,12 and 18).

The alarm system results are based on feedback information from the ECMWF data assimilation and consequently reflect the ECMWF data usage. Although most warnings are related to data problems, they may on occasion also be related to model issues. Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice. ECMWF accepts no responsibility for actions taken on the basis of these results.

Ensemble Data Assimilation at 2022-01-17 12:00

amsua
NOAA 15 AMSUA ALL SKY RADIANCES CHANNEL 10 : out of range 13 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.0884, expected range: -0.1287 -0.1068
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range 5 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.4351, expected range: -0.4049 -0.3840
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 10 : out of range 12 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1484, expected range: 0.0561 0.0944
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range 13 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.2431, expected range: 0.2707 0.2922
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range 14 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.2938, expected range: -0.2526 -0.2333
mhs
NOAA-19 MHS ALLSKY RADIANCES CHANNEL 1 : out of range 16 times in the last 10 days for at least one item Severely_persistent: stdev_norm_fgdepar=0.1349, expected range: 0.1183 0.1263
amsr2
AMSR2 GCOM-W1 ALLSKY RADIANCES CHANNEL 14 : out of range 2 times in the last 10 days for at least one item Severe: stdev_norm_fgdepar=0.1927, expected range: 0.1589 0.1717
mwhs2
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 2 : out of range 13 times in the last 10 days for at least one item Severely_persistent: stdev_norm_fgdepar=1.1595, expected range: 0.7711 0.8737 Severely_persistent: avg_biascorr=-2.7569, expected range: -1.8246 -1.1961
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 4 : out of range 17 times in the last 10 days for at least one item Severely_persistent: stdev_norm_fgdepar=0.8994, expected range: 0.6253 0.7109 Severely_persistent: avg_biascorr=-3.2981, expected range: -2.7281 -2.1322
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 5 : out of range 17 times in the last 10 days for at least one item Severely_persistent: stdev_norm_fgdepar=1.0094, expected range: 0.6268 0.7519 Severely_persistent: avg_biascorr=-1.7074, expected range: -0.4450 0.1240
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 6 : out of range 15 times in the last 10 days for at least one item Severely_persistent: stdev_norm_fgdepar=1.0474, expected range: 0.5700 0.8143 Severely_persistent: avg_biascorr=0.0575, expected range: 1.5698 2.2306
atms
NPP ATMS RADIANCES CHANNEL 10 : out of range 11 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.2359, expected range: -0.2825 -0.2579
NOAA20 ATMS RADIANCES CHANNEL 10 : out of range 19 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.3426, expected range: -0.4203 -0.3931
ssmis
DMSP-17 SSMIS RADIANCES CHANNEL 5 : out of range 4 times in the last 10 days for at least one item Severe: avg_biascorr=0.1199, expected range: 0.1918 0.2735
Atmospheric Motion Vector
HIMAWARI-8 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range 15 times in the last 10 days for at least one item Severely_persistent: obs_number=206.0000, expected range: 1210.0967 1365.5541
All METEOSAT-11 AMV IR3 ALL LAYERS Global : all data missing Severe: obs_number=0, expected range: 1104.50 3317.60
METEOSAT-8 AMV IR3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range Considerable: obs_number=472.0000, expected range: 0.0000 305.0170
GOES-17 AMV VIS1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range Considerable: obs_number=3380.0000, expected range: 3716.8716 4274.4617
Geostationary CSR
METEOSAT-8 SEVIRI RADIANCES CHANNEL 2 : out of range 1 times in the last 10 days for at least one item Severe: obs_number=57178.0000, expected range: 33794.1428 40678.4454
All METEOSAT-11 SEVIRI ALL CHANNELS Global : all data missing Severe: obs_number=0, expected range: 33768.26 49067.70
METEOSAT-8 SEVIRI RADIANCES CHANNEL 3 : out of range 1 times in the last 10 days for at least one item Considerable: obs_number=33983.0000, expected range: 16677.4080 25847.3086
scatt
METOP-C ASCAT WIND VECTOR DIFF (M/S) : out of range Considerable: obs_number=17394.0000, expected range: 14057.8003 16241.9751
amdar
AMDAR TEMPERATURE (K) PRESSURE LAYER 0-300 (HPA) : missing Severe: obs_number=0.0000, expected range: 31.1511 147.0844
WIGOS AMDAR TEMPERATURE (K) (2 pressure layers affected) : out of range Severe: rms_fgdepar=4.8424, expected range: 0.2593 0.9746