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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-01-13 00:00

amsua
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.2911, expected range: -0.2526 -0.2372
cris
NOAA20 CRIS RADIANCES CHANNEL 1174 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.0448, expected range: -0.0197 0.0103
NOAA20 CRIS RADIANCES CHANNEL 1221 : out of range
Severe: avg_biascorr=0.1792, expected range: 0.2039 0.2290
NOAA20 CRIS RADIANCES CHANNEL 1234 : out of range
Severe: avg_biascorr=-0.0098, expected range: 0.0108 0.0366
NOAA20 CRIS RADIANCES CHANNEL 1237 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0899, expected range: 0.1219 0.1465
NOAA20 CRIS RADIANCES CHANNEL 1238 : out of range
Severe: avg_biascorr=0.0364, expected range: 0.0607 0.0904
NOAA20 CRIS RADIANCES CHANNEL 1267 : out of range
Severe: avg_biascorr=0.1856, expected range: 0.2075 0.2315
airs
AQUA AIRS RADIANCES CHANNEL 305 : out of range
3 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.9060, expected range: 0.3239 0.4306
mwhs2
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 2 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-5.1329, expected range: -4.0202 -2.5797
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 14 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: obs_number=5809.0000, expected range: 7907.5258 8081.0054
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 15 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: obs_number=4963.0000, expected range: 6688.3813 6807.1293
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 13 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.1019, expected range: 1.5909 2.3275
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 14 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=1.3831, expected range: 4.0758 4.9579
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 5 : out of range
3 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.0048, expected range: 0.0335 0.0858
atms
NPP ATMS RADIANCES CHANNEL 11 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1390, expected range: -0.2344 -0.2025
ssmis
DMSP-17 SSMIS RADIANCES (5 channels affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=15674.0000, expected range: 16801.4290 19110.8210
DMSP-18 SSMIS RADIANCES CHANNEL 9 : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=15614.0000, expected range: 16723.2168 19227.1582
DMSP-18 SSMIS RADIANCES CHANNEL 10 : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=20449.0000, expected range: 21856.1182 24908.2568
DMSP-18 SSMIS RADIANCES CHANNEL 11 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=20270.0000, expected range: 21857.3887 24975.4863
gpsro
COSMIC2-E1 GPSRO RISING HEIGHT 10-12 KM : out of range
1 times in the last 10 days for at least one item
Slight: avg_norm_fgdepar=-0.1419, expected range: -0.0988 0.0189
Atmospheric Motion Vector
METOP-B AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range
Severe: avg_fgdepar=2.7602, expected range: 3.0053 3.2013
METEOSAT-8 AMV CLOUDY WV2 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=1252.0000, expected range: 232.3662 832.1166
GOES-16 AMV VIS1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
Considerable: obs_number=4592.0000, expected range: 5321.3368 5872.2632
NOAA20 VIIRS-AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA : out of range
4 times in the last 10 days for at least one item
Considerable: avg_press=434.4135, expected range: 348.3248 393.9966
GOES-17 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
Considerable: obs_number=1098.0000, expected range: 1478.2566 1863.7434
mwri
FY-3D MWRI RADIANCES (5 channels affected) : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=2709.0000, expected range: 2876.2718 3540.5022