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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-11-28 00:00

amsua
NOAA 15 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=0.6701, expected range: 0.5298 0.5874
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=0.7762, expected range: 0.5785 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=0.7131, expected range: 0.5620 0.5886
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7906, expected range: 0.6619 0.7152
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 11 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7382, expected range: 0.6464 0.6914
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=0.7453, expected range: 0.5856 0.6041
NOAA 19 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=0.6669, expected range: 0.5747 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=0.7696, expected range: 0.5812 0.5903
METOP-B 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=0.6767, expected range: 0.5630 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=0.7194, expected range: 0.5274 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=0.6481, expected range: 0.5287 0.5435
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7049, expected range: 0.6160 0.6492
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 7 : out of range
Considerable: obs_number=358.0000, expected range: 755.6494 2170.2512
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 6 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=331.0000, expected range: 700.9317 2026.0031
iasi
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=0.3533, expected range: 0.2328 0.2807
METOP-B IASI RADIANCES CHANNEL 3098 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.1140, expected range: -0.0773 0.0306
METOP-B IASI RADIANCES CHANNEL 2907 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.8184, expected range: -0.3947 0.2611
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=0.0210, expected range: -0.0222 0.0023
METOP-C IASI RADIANCES CHANNEL 1626 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1174, expected range: 0.0698 0.0964
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=0.2332, expected range: 0.2569 0.2649
METOP-C IASI RADIANCES (41 channels affected) : out of range
Severe: stdev_fgdepar=0.2471, expected range: 0.2793 0.2830
METOP-B IASI RADIANCES (56 channels affected) : out of range
Considerable: obs_number=1763.0000, expected range: 1245.5657 1654.8343
METOP-C IASI RADIANCES CHANNEL 3168 : out of range
Considerable: avg_fgdepar=0.2124, expected range: -0.0844 0.0963
cris
NOAA20 CRIS RADIANCES CHANNEL 93 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0230, expected range: -0.0509 -0.0224
NOAA20 CRIS RADIANCES CHANNEL 991 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4566, expected range: 0.3850 0.4127
NOAA20 CRIS RADIANCES CHANNEL 989 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1403, expected range: 0.0847 0.1088
NOAA20 CRIS RADIANCES CHANNEL 23 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1304, expected range: 0.1557 0.1717
NOAA20 CRIS RADIANCES CHANNEL 965 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1684, expected range: -0.2110 -0.2076
NOAA20 CRIS RADIANCES CHANNEL 99 : out of range
3 times in the last 10 days for at least one item
Slight: obs_number=10261.0000, expected range: 9088.1797 9886.2203
airs
AQUA AIRS RADIANCES CHANNEL 1520 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3588, expected range: 0.3079 0.3140
AQUA AIRS RADIANCES (26 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.6629, expected range: 0.8247 0.8250
AQUA AIRS RADIANCES (18 channels affected) : out of range
Severe: avg_biascorr=-0.1286, expected range: -0.0396 0.0207
AQUA AIRS RADIANCES CHANNEL 201 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=585.0000, expected range: 383.6954 510.1878
AQUA AIRS RADIANCES CHANNEL 198 : out of range
Considerable: obs_number=535.0000, expected range: 350.7608 457.0706
AQUA AIRS RADIANCES CHANNEL 192 : out of range
4 times in the last 10 days for at least one item
Considerable: obs_number=624.0000, expected range: 411.8690 547.0568
AQUA AIRS RADIANCES CHANNEL 190 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=642.0000, expected range: 431.9038 598.8791
mhs
NOAA-19 MHS ALLSKY RADIANCES CHANNEL 5 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=6032.0000, expected range: 6597.5476 8038.4499
METOP-B MHS ALLSKY RADIANCES CHANNEL 5 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=6307.0000, expected range: 6595.8093 7726.7327
atms
NPP ATMS RADIANCES CHANNEL 12 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5048, expected range: -0.4199 -0.3381
NPP ATMS RADIANCES CHANNEL 14 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.5922, expected range: 0.4122 0.4915
NOAA20 ATMS RADIANCES CHANNEL 12 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5947, expected range: -0.5250 -0.4607
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.5664, expected range: 0.3616 0.4529
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3182, expected range: 0.2571 0.2813
NPP ATMS RADIANCES CHANNEL 15 : out of range
4 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=1.0861, expected range: 0.7160 0.9597
NOAA20 ATMS RADIANCES CHANNEL 15 : out of range
3 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=1.1105, expected range: 0.6249 0.9247
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=0.0041, expected range: 0.0033 0.0037
DMSP-18 SSMIS RADIANCES CHANNEL 11 : out of range
Severe: stdev_norm_fgdepar=0.9417, expected range: 0.3139 0.6595
DMSP-18 SSMIS RADIANCES CHANNEL 10 : out of range
2 times in the last 10 days for at least one item
Severe: stdev_norm_fgdepar=1.0007, expected range: 0.2686 0.6365
Atmospheric Motion Vector
NOAA20 VIIRS-AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA : out of range
Slight: stdev_press=66.6184, expected range: 70.8081 79.1523