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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-07-26 00:00

amsua
NOAA-15 AMSUA RADIANCES CHANNEL 12 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4514, expected range: 0.3479 0.3821
NOAA-15 AMSUA RADIANCES CHANNEL 13 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.7011, expected range: 0.5416 0.5666
NOAA-18 AMSUA RADIANCES CHANNEL 12 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4731, expected range: 0.3506 0.4161
NOAA-18 AMSUA RADIANCES CHANNEL 13 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6986, expected range: 0.5240 0.6140
NOAA-19 AMSUA RADIANCES CHANNEL 12 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4490, expected range: 0.3760 0.4006
NOAA-19 AMSUA RADIANCES CHANNEL 13 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.7097, expected range: 0.5682 0.5930
NOAA-19 AMSUA RADIANCES CHANNEL 14 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.1909, expected range: 0.8466 1.0239
METOP-A AMSUA RADIANCES CHANNEL 11 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2003, expected range: 0.2445 0.2902
METOP-A AMSUA RADIANCES CHANNEL 12 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4669, expected range: 0.3842 0.4226
METOP-A AMSUA RADIANCES CHANNEL 13 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.7020, expected range: 0.5794 0.6295
METOP-A AMSUA RADIANCES CHANNEL 14 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.3032, expected range: 1.0282 1.0763
METOP-B AMSUA RADIANCES CHANNEL 12 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4733, expected range: 0.3344 0.3972
METOP-B AMSUA RADIANCES CHANNEL 13 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.7045, expected range: 0.5321 0.5883
METOP-B AMSUA RADIANCES CHANNEL 14 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.1541, expected range: 0.9065 1.0048
METOP-C AMSUA RADIANCES CHANNEL 12 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4332, expected range: 0.3116 0.3769
METOP-C AMSUA RADIANCES CHANNEL 13 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6625, expected range: 0.5066 0.5720
METOP-C AMSUA RADIANCES CHANNEL 14 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.0733, expected range: 0.9118 0.9838
METOP-A AMSUA RADIANCES (8 channels affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=3561.0000, expected range: 3924.3687 5296.0063
METOP-C AMSUA RADIANCES CHANNEL 5 : out of range
1 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.1449, expected range: -0.1205 -0.0872
METOP-C AMSUA RADIANCES (10 channels affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=8514.0000, expected range: 12090.7468 23495.0032
iasi
METOP-A IASI RADIANCES CHANNEL 5480 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2934, expected range: -0.2595 -0.2422
METOP-A IASI RADIANCES CHANNEL 151 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3326, expected range: -0.2865 -0.2840
METOP-A IASI RADIANCES CHANNEL 252 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5060, expected range: -0.4368 -0.3946
METOP-A IASI RADIANCES CHANNEL 256 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3012, expected range: -0.2510 -0.1998
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=2803.0000, expected range: 2180.3633 2374.8234
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=-0.2946, expected range: -0.2208 -0.2186
METOP-B IASI RADIANCES CHANNEL 252 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4511, expected range: -0.3964 -0.3475
METOP-C IASI RADIANCES CHANNEL 101 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4005, expected range: 0.3454 0.3703
METOP-C IASI RADIANCES CHANNEL 176 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3460, expected range: 0.2928 0.3200
METOP-C IASI RADIANCES CHANNEL 151 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3851, expected range: -0.3207 -0.3135
METOP-C IASI RADIANCES CHANNEL 252 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4957, expected range: -0.4504 -0.4083
METOP-A IASI RADIANCES (37 channels affected) : out of range
Severe: avg_biascorr=-0.0188, expected range: 0.0678 0.0965
METOP-B IASI RADIANCES (32 channels affected) : out of range
2 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0642, expected range: 0.1402 0.1485
METOP-A IASI RADIANCES CHANNEL 249 : out of range
4 times in the last 10 days for at least one item
Considerable: obs_number=403.0000, expected range: 769.0090 1250.8962
METOP-A IASI RADIANCES CHANNEL 260 : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=344.0000, expected range: 495.8463 923.4855
METOP-A IASI RADIANCES CHANNEL 306 : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=362.0000, expected range: 579.5018 975.0571
METOP-B IASI RADIANCES CHANNEL 249 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=314.0000, expected range: 779.6492 1308.3801
METOP-B IASI RADIANCES CHANNEL 260 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=232.0000, expected range: 485.6293 1095.3676
METOP-B IASI RADIANCES CHANNEL 306 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=252.0000, expected range: 578.7139 1135.8788
METOP-B IASI RADIANCES CHANNEL 3244 : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=232.0000, expected range: 674.9357 1336.2962
METOP-C IASI RADIANCES CHANNEL 246 : out of range
4 times in the last 10 days for at least one item
Considerable: obs_number=327.0000, expected range: 729.3313 1151.1110
METOP-C IASI RADIANCES CHANNEL 249 : out of range
4 times in the last 10 days for at least one item
Considerable: obs_number=336.0000, expected range: 756.8797 1178.6262
METOP-C IASI RADIANCES CHANNEL 306 : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=259.0000, expected range: 566.1823 945.7997
METOP-C IASI RADIANCES CHANNEL 3244 : out of range
4 times in the last 10 days for at least one item
Considerable: obs_number=258.0000, expected range: 648.0857 1218.2119
cris
NOAA20 CRIS RADIANCES CHANNEL 26 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=0.1129, expected range: 0.1248 0.1271
NOAA20 CRIS RADIANCES CHANNEL 965 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.0971, expected range: -0.1459 -0.1352
NOAA20 CRIS RADIANCES CHANNEL 989 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=0.1704, expected range: 0.1339 0.1354
NOAA20 CRIS RADIANCES CHANNEL 61 : out of range
Considerable: avg_biascorr=0.0927, expected range: 0.1008 0.1141
airs
AQUA AIRS RADIANCES CHANNEL 98 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0367, expected range: 0.0053 0.0312
AQUA AIRS RADIANCES CHANNEL 116 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2815, expected range: -0.2181 -0.2145
AQUA AIRS RADIANCES CHANNEL 128 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2038, expected range: -0.1589 -0.1414
AQUA AIRS RADIANCES CHANNEL 1111 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2988, expected range: 0.3651 0.3804
AQUA AIRS RADIANCES CHANNEL 129 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.9649, expected range: 0.8281 0.8964
AQUA AIRS RADIANCES CHANNEL 180 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.8364, expected range: -0.7228 -0.7120
atms
NPP ATMS RADIANCES CHANNEL 13 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4331, expected range: 0.3303 0.3760
NPP ATMS RADIANCES CHANNEL 14 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6739, expected range: 0.5082 0.5704
NPP ATMS RADIANCES CHANNEL 15 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.2520, expected range: 0.8963 1.0222
NPP ATMS RADIANCES CHANNEL 12 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3469, expected range: -0.3065 -0.3015
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4249, expected range: 0.2985 0.3473
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6758, expected range: 0.4841 0.5426
NOAA20 ATMS RADIANCES CHANNEL 15 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.2306, expected range: 0.7929 0.9906
NOAA20 ATMS RADIANCES CHANNEL 19 : out of range
Considerable: obs_number=570.0000, expected range: 34.5346 34.5346