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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-11-27 12:00

amsua
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=0.7045, expected range: 0.5662 0.5914
NOAA 18 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=0.6757, expected range: 0.5476 0.5886
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=0.6861, expected range: 0.5711 0.6041
NOAA 19 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=0.6453, expected range: 0.5562 0.5985
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=0.6928, expected range: 0.5674 0.5903
METOP-B 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=0.6602, expected range: 0.5405 0.5871
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=0.6627, expected range: 0.5124 0.5504
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=0.6249, expected range: 0.5000 0.5435
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6940, expected range: 0.6043 0.6492
iasi
METOP-B IASI RADIANCES CHANNEL 2907 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=1.0921, expected range: -0.3947 0.2611
METOP-B IASI RADIANCES CHANNEL 5401 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3742, expected range: 0.1973 0.2807
METOP-B IASI RADIANCES CHANNEL 205 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0234, expected range: 0.0318 0.0909
METOP-C IASI RADIANCES CHANNEL 249 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0399, expected range: -0.0311 0.0021
METOP-C IASI RADIANCES CHANNEL 5403 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4134, expected range: 0.1969 0.3206
METOP-C IASI RADIANCES CHANNEL 207 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0014, expected range: 0.0503 0.1187
METOP-C IASI RADIANCES CHANNEL 205 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0942, expected range: -0.0390 0.0124
METOP-C IASI RADIANCES CHANNEL 148 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3186, expected range: 0.2856 0.2886
Severely_persistent: avg_biascorr=0.1930, expected range: 0.2288 0.2341
METOP-C IASI RADIANCES CHANNEL 128 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2037, expected range: 0.2569 0.2615
METOP-C IASI RADIANCES CHANNEL 122 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2126, expected range: 0.2477 0.2659
METOP-C IASI RADIANCES CHANNEL 66 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2308, expected range: 0.2720 0.2899
METOP-C IASI RADIANCES CHANNEL 183 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0191, expected range: -0.0178 0.0023
METOP-C IASI RADIANCES (45 channels affected) : out of range
Severe: stdev_fgdepar=0.2479, expected range: 0.2774 0.2903
METOP-B IASI RADIANCES (133 channels affected) : out of range
Considerable: obs_number=1840.0000, expected range: 1084.8623 1523.9377
METOP-C IASI RADIANCES (22 channels affected) : out of range
Considerable: obs_number=1234.0000, expected range: 530.6438 1081.7562
cris
NOAA20 CRIS RADIANCES CHANNEL 991 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4543, expected range: 0.3866 0.4127
Slight: obs_number=5821.0000, expected range: 6060.3421 6753.9038
NOAA20 CRIS RADIANCES CHANNEL 989 : out of range
4 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1359, expected range: 0.0857 0.1088
Slight: obs_number=5756.0000, expected range: 5994.3853 6696.9395
NOAA20 CRIS RADIANCES CHANNEL 965 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1628, expected range: -0.2120 -0.2076
NOAA20 CRIS RADIANCES (18 channels affected) : out of range
Severe: avg_biascorr=0.2808, expected range: 0.1048 0.1845
NOAA20 CRIS RADIANCES (23 channels affected) : out of range
Severe: stdev_fgdepar=0.2125, expected range: 0.1703 0.1836
NOAA20 CRIS RADIANCES CHANNEL 1085 : out of range
7 times in the last 10 days for at least one item
Slight: obs_number=6989.0000, expected range: 7247.8970 7882.5030
NOAA20 CRIS RADIANCES CHANNEL 1061 : out of range
8 times in the last 10 days for at least one item
Slight: obs_number=7108.0000, expected range: 7411.8678 7918.5322
NOAA20 CRIS RADIANCES CHANNEL 1029 : out of range
8 times in the last 10 days for at least one item
Slight: obs_number=6659.0000, expected range: 6887.0788 7575.4747
NOAA20 CRIS RADIANCES CHANNEL 1005 : out of range
7 times in the last 10 days for at least one item
Slight: obs_number=6798.0000, expected range: 7068.0857 7786.7143
NOAA20 CRIS RADIANCES CHANNEL 993 : out of range
5 times in the last 10 days for at least one item
Slight: obs_number=5954.0000, expected range: 6151.4626 6870.2892
airs
AQUA AIRS RADIANCES CHANNEL 98 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3911, expected range: 0.1089 0.1112
AQUA AIRS RADIANCES CHANNEL 21 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2184, expected range: -0.0872 0.0688
AQUA AIRS RADIANCES CHANNEL 1520 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3455, expected range: 0.3109 0.3140
AQUA AIRS RADIANCES (17 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.7367, expected range: 0.8247 0.8388
AQUA AIRS RADIANCES (15 channels affected) : out of range
2 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.1013, expected range: -0.0396 0.0187
mhs
METOP-B MHS ALLSKY RADIANCES CHANNEL 5 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=6123.0000, expected range: 6595.8093 7751.5102
atms
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3099, expected range: 0.2519 0.2813
ssmis
DMSP-17 SSMIS RADIANCES CHANNEL 5 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0048, expected range: 0.0035 0.0037
Atmospheric Motion Vector
METOP-C AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : out of range
Considerable: obs_number=213.0000, expected range: 352.0986 606.5873
amdar
WIGOS AMDAR WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : missing
1 times in the last 10 days for at least one item
Severe: obs_number=0.0000, expected range: 0.0000 351.6549
ADS-C WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : missing
3 times in the last 10 days for at least one item
Severe: obs_number=0.0000, expected range: 0.0000 284.8532