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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-11-25 12:00

amsua
NOAA 15 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=0.6560, expected range: 0.5069 0.5874
NOAA 18 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=0.6513, expected range: 0.5132 0.5886
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6824, expected range: 0.4990 0.5914
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 9 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0039, expected range: 0.0030 0.0035
NOAA 19 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=0.6599, expected range: 0.5182 0.5985
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6862, expected range: 0.5061 0.6041
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6552, expected range: 0.5104 0.5871
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6796, expected range: 0.5000 0.5903
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6098, expected range: 0.4846 0.5435
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6414, expected range: 0.4747 0.5504
iasi
METOP-B IASI RADIANCES CHANNEL 1626 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1345, expected range: 0.0797 0.1101
METOP-B IASI RADIANCES CHANNEL 5401 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3853, expected range: 0.2139 0.2807
METOP-B IASI RADIANCES CHANNEL 5403 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4076, expected range: 0.1962 0.3147
METOP-B IASI RADIANCES CHANNEL 2907 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=1.6180, expected range: -0.3947 0.2611
METOP-B IASI RADIANCES CHANNEL 2958 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=1.4628, expected range: -0.5174 0.5063
METOP-C IASI RADIANCES CHANNEL 59 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3161, expected range: 0.3564 0.3567
METOP-C IASI RADIANCES CHANNEL 66 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2514, expected range: 0.2720 0.2982
METOP-C IASI RADIANCES CHANNEL 128 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2268, expected range: 0.2569 0.2700
METOP-C IASI RADIANCES CHANNEL 148 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2011, expected range: 0.2288 0.2389
METOP-C IASI RADIANCES CHANNEL 205 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0916, expected range: -0.0390 0.0251
METOP-C IASI RADIANCES CHANNEL 5401 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4117, expected range: 0.2366 0.3197
METOP-C IASI RADIANCES CHANNEL 5403 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4313, expected range: 0.2258 0.3206
METOP-B IASI RADIANCES (57 channels affected) : out of range
Severe: stdev_fgdepar=0.2721, expected range: 0.3132 0.3394
METOP-C IASI RADIANCES (61 channels affected) : out of range
2 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.2533, expected range: 0.2774 0.2956
METOP-C IASI RADIANCES (21 channels affected) : out of range
Severe: avg_biascorr=0.6279, expected range: 0.3262 0.3479
METOP-B IASI RADIANCES (32 channels affected) : out of range
Considerable: obs_number=1749.0000, expected range: 1226.4853 1634.7147
cris
NOAA20 CRIS RADIANCES CHANNEL 965 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1784, expected range: -0.2206 -0.2076
NOAA20 CRIS RADIANCES CHANNEL 989 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1277, expected range: 0.0892 0.1088
NOAA20 CRIS RADIANCES CHANNEL 991 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4478, expected range: 0.3989 0.4127
NOAA20 CRIS RADIANCES CHANNEL 99 : out of range
3 times in the last 10 days for at least one item
Slight: obs_number=10101.0000, expected range: 9088.1797 9886.2203
airs
AQUA AIRS RADIANCES CHANNEL 151 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1406, expected range: -0.0940 -0.0832
AQUA AIRS RADIANCES CHANNEL 98 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3383, expected range: 0.0918 0.1112
AQUA AIRS RADIANCES (20 channels affected) : out of range
Severe: stdev_fgdepar=0.7231, expected range: 0.8247 0.8269
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
DMSP-17 SSMIS RADIANCES CHANNEL 6 : out of range
2 times in the last 10 days for at least one item
Severe: stdev_norm_fgdepar=0.0054, expected range: 0.0038 0.0046
Atmospheric Motion Vector
GOES-16 AMV VIS1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
Considerable: avg_fgdepar=1.7221, expected range: 1.3196 1.5331