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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

amsua
NOAA-15 AMSUA RADIANCES CHANNEL 13 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6297, expected range: 0.5405 0.5666
NOAA-18 AMSUA RADIANCES CHANNEL 12 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4608, expected range: 0.3644 0.4161
NOAA-18 AMSUA RADIANCES CHANNEL 13 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.7038, expected range: 0.5575 0.6140
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=1.1589, expected range: 0.9447 1.0161
NOAA-19 AMSUA RADIANCES CHANNEL 13 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6610, expected range: 0.5822 0.5930
NOAA-19 AMSUA RADIANCES CHANNEL 14 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.2323, expected range: 0.9409 1.0239
METOP-A AMSUA RADIANCES CHANNEL 12 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4669, expected range: 0.3998 0.4226
METOP-A AMSUA RADIANCES CHANNEL 13 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.7108, expected range: 0.6046 0.6295
METOP-B AMSUA RADIANCES CHANNEL 12 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4471, expected range: 0.3514 0.3972
METOP-B AMSUA RADIANCES CHANNEL 13 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6728, expected range: 0.5419 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=1.1685, expected range: 0.9432 1.0048
METOP-C AMSUA RADIANCES CHANNEL 12 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4425, expected range: 0.3310 0.3769
METOP-C AMSUA RADIANCES CHANNEL 13 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6500, expected range: 0.5192 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=1.1111, expected range: 0.9246 0.9838
iasi
METOP-A IASI RADIANCES CHANNEL 5480 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2876, expected range: -0.2595 -0.2292
METOP-A IASI RADIANCES CHANNEL 151 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3197, expected range: -0.2865 -0.2617
METOP-A IASI RADIANCES CHANNEL 252 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4870, expected range: -0.4368 -0.3724
METOP-A IASI RADIANCES CHANNEL 3029 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: obs_number=743.0000, expected range: 256.5698 394.1899
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=717.0000, expected range: 253.0800 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=2795.0000, expected range: 2210.8968 2374.8234
METOP-B IASI RADIANCES CHANNEL 176 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3679, 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=-0.2736, expected range: -0.2208 -0.2131
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=2676.0000, expected range: 2017.6689 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=2873.0000, expected range: 2200.3565 2329.7316
METOP-C IASI RADIANCES CHANNEL 176 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3503, expected range: 0.2897 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=-0.3639, expected range: -0.3207 -0.3046
METOP-C IASI RADIANCES CHANNEL 252 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5082, expected range: -0.4504 -0.3887
METOP-A IASI RADIANCES (29 channels affected) : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0376, expected range: 0.0678 0.1061
METOP-B IASI RADIANCES (29 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.1065, expected range: 0.1402 0.1433
METOP-B IASI RADIANCES CHANNEL 3107 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=1084.0000, expected range: 195.5178 901.7943
METOP-C IASI RADIANCES CHANNEL 3105 : out of range
Considerable: obs_number=1315.0000, expected range: 219.7813 1090.3922
METOP-C IASI RADIANCES CHANNEL 3107 : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=1260.0000, expected range: 194.3622 890.1903
METOP-C IASI RADIANCES CHANNEL 3160 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=1290.0000, expected range: 206.4073 980.8678
cris
NOAA20 CRIS RADIANCES (28 channels affected) : out of range
Severe: stdev_fgdepar=0.2303, expected range: 0.1904 0.2105
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=-0.0074, expected range: 0.0565 0.0615
AQUA AIRS RADIANCES CHANNEL 1111 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2796, expected range: 0.3651 0.4412
AQUA AIRS RADIANCES CHANNEL 110 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.0231, expected range: 0.8695 0.9376
AQUA AIRS RADIANCES CHANNEL 180 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.7954, expected range: -0.7228 -0.7141
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=-0.3508, expected range: -0.3065 -0.2933
NPP ATMS RADIANCES CHANNEL 13 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4123, expected range: 0.3546 0.3760
NPP ATMS RADIANCES CHANNEL 14 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6569, expected range: 0.5287 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=1.1942, expected range: 0.9648 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=-0.4406, expected range: -0.3966 -0.3950
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3899, expected range: 0.3175 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=0.6230, expected range: 0.4911 0.5426
NOAA20 ATMS RADIANCES CHANNEL 15 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.1909, expected range: 0.8116 0.9906
Atmospheric Motion Vector
METEOSAT-11 AMV VIS2 WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HP : out of range
Considerable: obs_number=1364.0000, expected range: 425.8103 1025.9397