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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 00:00

amsua
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 10 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1489, expected range: 0.0606 0.0944
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2480, expected range: 0.2707 0.2927
METOP-C 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=-0.2876, expected range: -0.2526 -0.2334
iasi
METOP-B IASI RADIANCES CHANNEL 3168 : out of range
Severe: stdev_fgdepar=0.7290, expected range: 0.4327 0.5956
METOP-B IASI RADIANCES CHANNEL 3248 : out of range
Severe: stdev_fgdepar=0.7239, expected range: 0.4160 0.5437
METOP-B IASI RADIANCES CHANNEL 3448 : out of range
Severe: stdev_fgdepar=0.8276, expected range: 0.5619 0.7023
cris
NOAA20 CRIS RADIANCES CHANNEL 1267 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1818, expected range: 0.2075 0.2410
NOAA20 CRIS RADIANCES CHANNEL 42 : out of range
1 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.1380, expected range: 0.0969 0.1361
NOAA20 CRIS RADIANCES CHANNEL 45 : out of range
1 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.1438, expected range: 0.0889 0.1423
NOAA20 CRIS RADIANCES CHANNEL 51 : out of range
1 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.1291, expected range: 0.0855 0.1287
NOAA20 CRIS RADIANCES CHANNEL 54 : out of range
2 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.1231, expected range: 0.0874 0.1230
mhs
NOAA-19 MHS ALLSKY RADIANCES CHANNEL 1 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.1360, expected range: 0.1187 0.1263
METOP-B MHS ALLSKY RADIANCES CHANNEL 1 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.1429, expected range: 0.1160 0.1245
METOP-B MHS ALLSKY RADIANCES CHANNEL 5 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: obs_number=5883.0000, expected range: 6595.8093 6740.8217
METOP-C MHS ALLSKY RADIANCES CHANNEL 1 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.1378, expected range: 0.1133 0.1259
amsr2
AMSR2 GCOM-W1 ALLSKY RADIANCES CHANNEL 14 : out of range
1 times in the last 10 days for at least one item
Severe: stdev_norm_fgdepar=0.1887, expected range: 0.1585 0.1717
mwhs2
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 4 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-3.2908, expected range: -2.7281 -2.1322
Slight: stdev_norm_fgdepar=0.7360, expected range: 0.6253 0.7109
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 5 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-1.5666, expected range: -0.4450 0.1240
Severely_persistent: stdev_norm_fgdepar=0.7655, expected range: 0.6390 0.7095
Severely_persistent: avg_norm_fgdepar=0.4828, expected range: -0.1471 0.1652
Severely_persistent: avg_norm_fgdepar=0.4226, expected range: -0.0727 0.1371
Slight: stdev_norm_fgdepar=0.8108, expected range: 0.6268 0.7519
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 6 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1855, expected range: 1.5698 2.2306
Severely_persistent: avg_norm_fgdepar=0.4102, expected range: -0.0977 0.1112
Severely_persistent: avg_norm_fgdepar=0.3267, expected range: -0.1003 0.1015
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=0.9146, expected range: 0.7906 0.8460
Severely_persistent: avg_biascorr=-2.5545, expected range: -1.8246 -1.1961
Slight: stdev_norm_fgdepar=0.9049, expected range: 0.7711 0.8737
atms
NPP ATMS RADIANCES CHANNEL 10 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2385, expected range: -0.2823 -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=-0.3455, expected range: -0.4187 -0.3931
ssmis
DMSP-17 SSMIS RADIANCES CHANNEL 5 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=0.1046, expected range: 0.1918 0.2708
Atmospheric Motion Vector
METEOSAT-8 AMV IR3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=791.0000, expected range: 234.5377 574.8941
Geostationary CSR
METEOSAT-8 SEVIRI RADIANCES CHANNEL 2 : out of range
Severe: obs_number=56805.0000, expected range: 33677.8120 40784.5630
METEOSAT-8 SEVIRI RADIANCES CHANNEL 3 : out of range
Considerable: obs_number=31358.0000, expected range: 16677.4080 25806.8748
mwri
FY-3D MWRI RADIANCES (6 channels affected) : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=2682.0000, expected range: 2876.2718 3375.4588