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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-11-20 00:00

amsua
NOAA 15 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6900, expected range: 0.5390 0.5874
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6550, expected range: 0.5442 0.5886
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6894, expected range: 0.5482 0.5914
Severely_persistent: stdev_norm_fgdepar=0.7317, expected range: 0.4505 0.6098
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6608, expected range: 0.5509 0.5985
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7278, expected range: 0.5430 0.6041
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6590, expected range: 0.5426 0.5871
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7084, expected range: 0.5449 0.5903
Severely_persistent: stdev_norm_fgdepar=0.7498, expected range: 0.4502 0.6113
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6114, expected range: 0.5126 0.5435
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6767, expected range: 0.5112 0.5504
Severely_persistent: stdev_norm_fgdepar=0.6768, expected range: 0.4342 0.5580
iasi
METOP-C IASI RADIANCES CHANNEL 59 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3303, expected range: 0.3564 0.3836
METOP-C IASI RADIANCES CHANNEL 128 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.5193, expected range: 0.3189 0.3867
METOP-C IASI RADIANCES CHANNEL 49 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4282, expected range: 0.2853 0.3247
METOP-C IASI RADIANCES CHANNEL 122 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.5134, expected range: 0.3295 0.3479
METOP-C IASI RADIANCES CHANNEL 131 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3733, expected range: 0.2235 0.2767
METOP-C IASI RADIANCES CHANNEL 161 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3330, expected range: 0.1915 0.2161
METOP-C IASI RADIANCES CHANNEL 207 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0789, expected range: -0.0343 0.0110
METOP-C IASI RADIANCES CHANNEL 1579 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1404, expected range: -0.1861 -0.0459
METOP-C IASI RADIANCES CHANNEL 148 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3089, expected range: 0.2686 0.2886
METOP-C IASI RADIANCES CHANNEL 191 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2760, expected range: 0.2399 0.2603
METOP-B IASI RADIANCES (85 channels affected) : out of range
Severe: obs_number=898.0000, expected range: 283.2326 431.5674
METOP-C IASI RADIANCES (37 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.2621, expected range: 0.2886 0.3032
METOP-C IASI RADIANCES CHANNEL 133 : out of range
4 times in the last 10 days for at least one item
Severe: avg_biascorr=0.4454, expected range: 0.2951 0.3757
METOP-B IASI RADIANCES CHANNEL 189 : out of range
2 times in the last 10 days for at least one item
Considerable: avg_fgdepar=0.0387, expected range: -0.0295 0.0150
METOP-B IASI RADIANCES CHANNEL 195 : out of range
2 times in the last 10 days for at least one item
Considerable: avg_fgdepar=0.0299, expected range: -0.0248 0.0112
METOP-C IASI RADIANCES (21 channels affected) : out of range
Considerable: obs_number=1506.0000, expected range: 530.6438 1081.7562
cris
NOAA20 CRIS RADIANCES CHANNEL 965 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1775, expected range: -0.2230 -0.2076
NOAA20 CRIS RADIANCES CHANNEL 26 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1018, expected range: -0.0384 0.0361
NOAA20 CRIS RADIANCES CHANNEL 653 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0582, expected range: 0.0039 0.0266
NOAA20 CRIS RADIANCES CHANNEL 657 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0606, expected range: -0.0429 -0.0207
NOAA20 CRIS RADIANCES CHANNEL 981 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5683, expected range: -0.5113 -0.4405
Slight: obs_number=6504.0000, expected range: 6695.9922 7374.5316
NOAA20 CRIS RADIANCES CHANNEL 118 : out of range
Considerable: obs_number=4746.0000, expected range: 4013.6798 4582.3202
NOAA20 CRIS RADIANCES CHANNEL 120 : out of range
Considerable: obs_number=4543.0000, expected range: 3794.5040 4355.4960
NOAA20 CRIS RADIANCES CHANNEL 121 : out of range
Considerable: obs_number=4716.0000, expected range: 3966.5262 4519.0738
NOAA20 CRIS RADIANCES CHANNEL 123 : out of range
Considerable: obs_number=4611.0000, expected range: 3878.9497 4388.2503
NOAA20 CRIS RADIANCES (21 channels affected) : out of range
Considerable: obs_number=2220.0000, expected range: 2386.2744 2944.9256
NOAA20 CRIS RADIANCES CHANNEL 1005 : out of range
5 times in the last 10 days for at least one item
Slight: obs_number=6829.0000, expected range: 7068.0857 7755.4920
NOAA20 CRIS RADIANCES CHANNEL 1029 : out of range
5 times in the last 10 days for at least one item
Slight: obs_number=6691.0000, expected range: 6887.0788 7587.8047
NOAA20 CRIS RADIANCES CHANNEL 1061 : out of range
5 times in the last 10 days for at least one item
Slight: obs_number=7149.0000, expected range: 7411.8678 7918.5322
NOAA20 CRIS RADIANCES CHANNEL 1085 : out of range
5 times in the last 10 days for at least one item
Slight: obs_number=7041.0000, expected range: 7247.8970 7882.5030
airs
AQUA AIRS RADIANCES CHANNEL 105 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.7481, expected range: 0.6456 0.6662
AQUA AIRS RADIANCES CHANNEL 98 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2928, expected range: 0.0958 0.1112
AQUA AIRS RADIANCES CHANNEL 117 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1257, expected range: -0.1489 -0.0882
AQUA AIRS RADIANCES (16 channels affected) : out of range
Severe: stdev_fgdepar=0.9135, expected range: 0.9989 1.0680
AQUA AIRS RADIANCES (13 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.1517, expected range: -0.0660 -0.0431
atms
NPP ATMS RADIANCES CHANNEL 14 : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.5594, expected range: 0.4388 0.4915
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
4 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.3037, expected range: 0.2532 0.2813
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.5039, expected range: 0.3990 0.4529
NPP ATMS RADIANCES CHANNEL 12 : out of range
1 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.4670, expected range: -0.4199 -0.3513
ssmis
DMSP-17 SSMIS RADIANCES CHANNEL 5 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0047, expected range: 0.0036 0.0037
Atmospheric Motion Vector
GOES-16 AMV VIS1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range
Considerable: stdev_fgdepar=1.5774, expected range: 0.9560 1.2877