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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-05-14 12:00

amsua
NOAA 15 AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0030, expected range: -0.0447 -0.0426
Severely_persistent: avg_biascorr=0.0520, expected range: -0.0089 0.0142
NOAA 15 AMSUA ALL SKY RADIANCES CHANNEL 8 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0893, expected range: 0.1690 0.2256
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 7 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5941, expected range: -0.4647 -0.3954
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 9 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0079, expected range: -0.0444 -0.0251
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 7 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5572, expected range: -0.4980 -0.4546
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 8 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1825, expected range: 0.3342 0.3500
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 9 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1949, expected range: -0.0945 -0.0739
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 8 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2686, expected range: -0.1685 -0.1299
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 9 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.6535, expected range: -0.6014 -0.5525
mhs
NOAA-19 MHS ALLSKY RADIANCES CHANNEL 5 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0947, expected range: -0.0262 0.0308
atms
NPP ATMS RADIANCES CHANNEL 20 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1390, expected range: 0.0700 0.1000
NPP ATMS RADIANCES CHANNEL 21 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3239, expected range: 0.2658 0.2901
NPP ATMS RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1108, expected range: 0.0629 0.0661
NOAA20 ATMS RADIANCES CHANNEL 20 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1327, expected range: -0.1924 -0.1689
NOAA20 ATMS RADIANCES CHANNEL 21 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0874, expected range: 0.0300 0.0522
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1291, expected range: -0.1675 -0.1637
Atmospheric Motion Vector
AQUA MODIS CLOUDY WV WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HP : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=602.0000, expected range: 265.7365 444.1250
GOES-17 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
Slight: avg_fgdepar=1.9143, expected range: 1.4350 1.7276