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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-07-24 00:00

amsua
NOAA-15 AMSUA RADIANCES CHANNEL 12 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4194, expected range: 0.3543 0.3821
NOAA-18 AMSUA RADIANCES CHANNEL 14 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.1202, expected range: 0.9430 1.0161
METOP-B AMSUA RADIANCES CHANNEL 12 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4284, expected range: 0.3567 0.3972
METOP-B AMSUA RADIANCES CHANNEL 13 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6345, expected range: 0.5418 0.5883
METOP-B AMSUA RADIANCES CHANNEL 14 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.1012, expected range: 0.9417 1.0048
METOP-C AMSUA RADIANCES CHANNEL 12 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4151, expected range: 0.3414 0.3769
METOP-C AMSUA RADIANCES CHANNEL 13 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6173, expected range: 0.5264 0.5720
METOP-C AMSUA RADIANCES CHANNEL 14 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.0622, expected range: 0.9211 0.9838
iasi
METOP-A IASI RADIANCES CHANNEL 5480 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2847, expected range: -0.2595 -0.2290
METOP-A IASI RADIANCES CHANNEL 5379 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: obs_number=2690.0000, expected range: 2230.4530 2238.5925
METOP-A IASI RADIANCES CHANNEL 5381 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: obs_number=2472.0000, expected range: 2022.6582 2104.2884
METOP-A IASI RADIANCES CHANNEL 151 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3188, expected range: -0.2865 -0.2609
METOP-A IASI RADIANCES CHANNEL 252 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4882, expected range: -0.4368 -0.3719
METOP-A IASI RADIANCES CHANNEL 3049 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: obs_number=625.0000, expected range: 259.8024 363.3177
METOP-B IASI RADIANCES CHANNEL 5383 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: obs_number=2756.0000, expected range: 2210.8968 2374.8234
METOP-B IASI RADIANCES CHANNEL 176 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3717, expected range: 0.3090 0.3382
METOP-B IASI RADIANCES CHANNEL 151 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2782, expected range: -0.2208 -0.2131
METOP-B IASI RADIANCES CHANNEL 252 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4555, expected range: -0.3964 -0.3220
METOP-C IASI RADIANCES CHANNEL 5379 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: obs_number=2539.0000, expected range: 2069.6806 2170.9682
METOP-C IASI RADIANCES CHANNEL 5383 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: obs_number=2775.0000, expected range: 2261.2580 2329.7316
METOP-C IASI RADIANCES CHANNEL 101 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4021, expected range: 0.3500 0.3703
METOP-C IASI RADIANCES CHANNEL 176 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3501, expected range: 0.2974 0.3200
METOP-C IASI RADIANCES CHANNEL 151 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3576, expected range: -0.3207 -0.3031
METOP-C IASI RADIANCES CHANNEL 252 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5112, expected range: -0.4504 -0.3873
METOP-A IASI RADIANCES (32 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0012, expected range: 0.0678 0.0957
METOP-B IASI RADIANCES (34 channels affected) : out of range
Severe: avg_biascorr=0.0793, expected range: 0.1402 0.1433
METOP-A IASI RADIANCES CHANNEL 249 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=525.0000, expected range: 769.0090 1279.1089
METOP-A IASI RADIANCES CHANNEL 254 : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=553.0000, expected range: 836.1015 1322.5188
METOP-A IASI RADIANCES CHANNEL 260 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=362.0000, expected range: 495.8463 980.0532
METOP-A IASI RADIANCES CHANNEL 306 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=404.0000, expected range: 579.5018 1034.9534
METOP-A IASI RADIANCES CHANNEL 3244 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=471.0000, expected range: 660.7084 1227.6390
METOP-B IASI RADIANCES CHANNEL 249 : out of range
Considerable: obs_number=503.0000, expected range: 779.6492 1229.5967
METOP-B IASI RADIANCES CHANNEL 254 : out of range
4 times in the last 10 days for at least one item
Considerable: obs_number=537.0000, expected range: 857.7259 1270.9123
METOP-B IASI RADIANCES CHANNEL 256 : out of range
4 times in the last 10 days for at least one item
Considerable: obs_number=407.0000, expected range: 658.3159 1111.7133
METOP-B IASI RADIANCES CHANNEL 260 : out of range
Considerable: obs_number=305.0000, expected range: 485.6293 1019.1732
METOP-B IASI RADIANCES CHANNEL 262 : out of range
Considerable: obs_number=269.0000, expected range: 432.0717 949.1081
METOP-B IASI RADIANCES CHANNEL 306 : out of range
Considerable: obs_number=354.0000, expected range: 578.7139 1059.5775
METOP-B IASI RADIANCES CHANNEL 3165 : out of range
Considerable: obs_number=370.0000, expected range: 485.1743 926.8211
METOP-B IASI RADIANCES CHANNEL 3244 : out of range
Considerable: obs_number=465.0000, expected range: 674.9357 1211.0664
METOP-C IASI RADIANCES CHANNEL 157 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.3398, expected range: 0.2846 0.3200
METOP-C IASI RADIANCES CHANNEL 246 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=513.0000, expected range: 729.3313 1260.2527
METOP-C IASI RADIANCES CHANNEL 249 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=527.0000, expected range: 756.8797 1289.9112
METOP-C IASI RADIANCES CHANNEL 254 : out of range
4 times in the last 10 days for at least one item
Considerable: obs_number=573.0000, expected range: 831.9619 1328.9010
METOP-C IASI RADIANCES CHANNEL 260 : out of range
Considerable: obs_number=336.0000, expected range: 475.6411 997.3499
METOP-C IASI RADIANCES CHANNEL 306 : out of range
Considerable: obs_number=380.0000, expected range: 566.1823 1058.7949
METOP-C IASI RADIANCES CHANNEL 3312 : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=611.0000, expected range: 803.7090 1544.0678
cris
NOAA20 CRIS RADIANCES CHANNEL 33 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2377, expected range: 0.1817 0.2098
NOAA20 CRIS RADIANCES CHANNEL 64 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1626, expected range: 0.1188 0.1424
NOAA20 CRIS RADIANCES CHANNEL 1165 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=938.0000, expected range: 24.5429 735.1029
airs
AQUA AIRS RADIANCES CHANNEL 1123 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0068, expected range: 0.0565 0.0629
AQUA AIRS RADIANCES CHANNEL 98 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0369, expected range: 0.0053 0.0300
AQUA AIRS RADIANCES CHANNEL 116 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2969, expected range: -0.2181 -0.2118
AQUA AIRS RADIANCES CHANNEL 128 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1903, expected range: -0.1589 -0.1468
AQUA AIRS RADIANCES CHANNEL 1111 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2582, expected range: 0.3651 0.4401
AQUA AIRS RADIANCES CHANNEL 180 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.8278, expected range: -0.7228 -0.7116
atms
NPP ATMS RADIANCES CHANNEL 12 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3465, expected range: -0.3065 -0.2924
NPP ATMS RADIANCES CHANNEL 13 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4159, expected range: 0.3536 0.3760
NPP ATMS RADIANCES CHANNEL 14 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6487, expected range: 0.5269 0.5704
NPP ATMS RADIANCES CHANNEL 15 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.1692, expected range: 0.9607 1.0222
NOAA20 ATMS RADIANCES CHANNEL 12 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4378, expected range: -0.3966 -0.3946
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3737, expected range: 0.3166 0.3473
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.5966, expected range: 0.4898 0.5426