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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-09-22 12:00

iasi
METOP-B IASI RADIANCES CHANNEL 70 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3484, expected range: 0.2728 0.3149
METOP-B IASI RADIANCES CHANNEL 83 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.5405, expected range: 0.4520 0.4854
METOP-B IASI RADIANCES CHANNEL 85 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.5029, expected range: 0.4156 0.4606
METOP-B IASI RADIANCES CHANNEL 1658 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0676, expected range: 0.0779 0.0841
METOP-B IASI RADIANCES CHANNEL 79 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2888, expected range: 0.3325 0.3344
METOP-B IASI RADIANCES CHANNEL 55 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2562, expected range: 0.2852 0.2971
METOP-B IASI RADIANCES CHANNEL 111 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2242, expected range: 0.2570 0.2624
METOP-B IASI RADIANCES CHANNEL 131 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3521, expected range: 0.3902 0.3978
METOP-B IASI RADIANCES CHANNEL 146 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2099, expected range: 0.2385 0.2545
METOP-B IASI RADIANCES CHANNEL 386 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0249, expected range: 0.1102 0.1262
METOP-C IASI RADIANCES CHANNEL 87 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1628, expected range: 0.1012 0.1225
METOP-C IASI RADIANCES CHANNEL 1639 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0574, expected range: 0.0644 0.0706
METOP-C IASI RADIANCES CHANNEL 1658 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1102, expected range: 0.1213 0.1251
METOP-C IASI RADIANCES CHANNEL 111 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2987, expected range: 0.3474 0.3828
METOP-B IASI RADIANCES CHANNEL 81 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=0.4678, expected range: 0.4021 0.4354
METOP-C IASI RADIANCES (29 channels affected) : out of range
Severe: avg_biascorr=0.0997, expected range: 0.1312 0.1529
METOP-C IASI RADIANCES CHANNEL 59 : out of range
4 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.3323, expected range: 0.3692 0.4380
METOP-C IASI RADIANCES CHANNEL 66 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.3304, expected range: 0.3648 0.4239
METOP-C IASI RADIANCES CHANNEL 81 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.3153, expected range: 0.3579 0.4381
METOP-C IASI RADIANCES CHANNEL 85 : out of range
3 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.3117, expected range: 0.3425 0.3870
METOP-C IASI RADIANCES CHANNEL 104 : out of range
Considerable: stdev_fgdepar=0.3142, expected range: 0.3431 0.3922
METOP-C IASI RADIANCES CHANNEL 133 : out of range
3 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.2766, expected range: 0.3160 0.3789
METOP-C IASI RADIANCES CHANNEL 195 : out of range
Considerable: stdev_fgdepar=0.2624, expected range: 0.2902 0.3441
airs
AQUA AIRS RADIANCES CHANNEL 93 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1013, expected range: -0.0672 -0.0486
AQUA AIRS RADIANCES CHANNEL 99 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0294, expected range: 0.0494 0.0653
AQUA AIRS RADIANCES CHANNEL 104 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0343, expected range: 0.0535 0.0668
AQUA AIRS RADIANCES CHANNEL 105 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1151, expected range: 0.1360 0.1612
AQUA AIRS RADIANCES CHANNEL 111 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0729, expected range: -0.0449 -0.0295
AQUA AIRS RADIANCES CHANNEL 116 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0044, expected range: 0.0522 0.0552
AQUA AIRS RADIANCES CHANNEL 117 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0095, expected range: 0.0177 0.0427
AQUA AIRS RADIANCES CHANNEL 123 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1095, expected range: -0.0793 -0.0653
AQUA AIRS RADIANCES CHANNEL 128 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0301, expected range: 0.0652 0.1042
Severely_persistent: avg_biascorr=0.0142, expected range: -0.1137 -0.0912
AQUA AIRS RADIANCES CHANNEL 129 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1261, expected range: -0.0794 -0.0514
Severely_persistent: avg_biascorr=-0.1114, expected range: -0.2036 -0.1726
AQUA AIRS RADIANCES CHANNEL 1869 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2118, expected range: 0.2395 0.2596
AQUA AIRS RADIANCES (82 channels affected) : out of range
Severe: obs_number=6910.0000, expected range: 9586.2255 10609.8921
mwhs2
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 7 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_norm_fgdepar=0.9314, expected range: 0.5981 0.8068
Slight: avg_norm_fgdepar=-0.1526, expected range: -0.0771 0.0830
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 15 : out of range
Slight: stdev_norm_fgdepar=0.7823, expected range: 0.5495 0.7318
atms
NPP ATMS RADIANCES (15 channels affected) : out of range
Considerable: obs_number=16981.0000, expected range: 22216.8327 24875.2850
ssmis
DMSP-17 SSMIS RADIANCES CHANNEL 11 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_norm_fgdepar=-0.2024, expected range: -0.1443 -0.0742
DMSP-18 SSMIS RADIANCES CHANNEL 7 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=4.8226, expected range: 4.0931 4.2426
gbrad
All GROUND-BASED RADAR Global : all data missing
Severe: obs_number=0, expected range: 0.00 4193.57