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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-07-23 00:00

amsua
NOAA-15 AMSUA RADIANCES CHANNEL 12 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4161, expected range: 0.3578 0.3821
NOAA-15 AMSUA RADIANCES CHANNEL 13 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6242, expected range: 0.5477 0.5666
METOP-C AMSUA RADIANCES CHANNEL 12 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4177, expected range: 0.3352 0.3769
METOP-C AMSUA RADIANCES CHANNEL 13 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6268, expected range: 0.5071 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=1.0748, expected range: 0.9206 0.9838
iasi
METOP-A IASI RADIANCES CHANNEL 5480 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2902, expected range: -0.2595 -0.2319
METOP-A IASI RADIANCES CHANNEL 151 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3341, expected range: -0.2865 -0.2689
METOP-A IASI RADIANCES CHANNEL 252 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4896, expected range: -0.4368 -0.3780
All METOP-B IASI ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 22379.97 22841.72
METOP-C IASI RADIANCES CHANNEL 151 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3663, expected range: -0.3207 -0.2990
METOP-C IASI RADIANCES CHANNEL 252 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5002, expected range: -0.4504 -0.3883
METOP-A IASI RADIANCES (202 channels affected) : out of range
Severe: obs_number=15060.0000, expected range: 21799.2368 22987.1382
METOP-C IASI RADIANCES (29 channels affected) : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0079, expected range: 0.0426 0.0491
METOP-C IASI RADIANCES CHANNEL 249 : out of range
Considerable: obs_number=595.0000, expected range: 756.8797 1202.6541
METOP-C IASI RADIANCES CHANNEL 254 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=633.0000, expected range: 831.9619 1252.0395
METOP-C IASI RADIANCES CHANNEL 256 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=499.0000, expected range: 635.9651 1076.8338
METOP-C IASI RADIANCES CHANNEL 3244 : out of range
Considerable: obs_number=461.0000, expected range: 648.0857 1253.7788
METOP-C IASI RADIANCES CHANNEL 3312 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=595.0000, expected range: 803.7090 1482.0367
cris
NOAA20 CRIS RADIANCES CHANNEL 33 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2461, expected range: 0.1738 0.2098
NOAA20 CRIS RADIANCES CHANNEL 64 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1668, expected range: 0.1189 0.1424
NOAA20 CRIS RADIANCES CHANNEL 83 : out of range
Considerable: obs_number=595.0000, expected range: 795.2815 1498.3435
NOAA20 CRIS RADIANCES CHANNEL 1109 : out of range
Considerable: obs_number=213.0000, expected range: 495.9244 1092.7437
NOAA20 CRIS RADIANCES CHANNEL 1205 : out of range
Considerable: obs_number=207.0000, expected range: 473.0682 1084.5498
NOAA20 CRIS RADIANCES CHANNEL 1213 : out of range
Considerable: obs_number=219.0000, expected range: 487.4153 1141.6886
airs
AQUA AIRS RADIANCES CHANNEL 1869 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2103, expected range: -0.1947 -0.1798
AQUA AIRS RADIANCES CHANNEL 1123 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0154, expected range: 0.0565 0.0624
AQUA AIRS RADIANCES CHANNEL 98 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0397, expected range: 0.0053 0.0419
AQUA AIRS RADIANCES CHANNEL 104 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2597, expected range: -0.1800 -0.1797
AQUA AIRS RADIANCES CHANNEL 116 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2930, expected range: -0.2181 -0.2152
AQUA AIRS RADIANCES CHANNEL 128 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1837, expected range: -0.1589 -0.1403
AQUA AIRS RADIANCES CHANNEL 1111 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2720, expected range: 0.3651 0.4710
AQUA AIRS RADIANCES CHANNEL 180 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.8035, expected range: -0.7228 -0.7088
mhs
NOAA-19 MHS ALLSKY RADIANCES CHANNEL 4 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=14220.0000, expected range: 15716.4299 16931.3201
amsr2
AMSR2 GCOM-W1 ALLSKY RADIANCES (6 channels affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=3837.0000, expected range: 4074.7041 4828.9209
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=-0.3412, expected range: -0.3065 -0.2925
NPP ATMS RADIANCES CHANNEL 14 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6134, expected range: 0.5248 0.5704
NPP ATMS RADIANCES CHANNEL 15 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.0901, expected range: 0.9390 1.0222
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.5915, expected range: 0.4906 0.5426
Atmospheric Motion Vector
All GOES-17 AMV CLOUDY WV3 ALL LAYERS Global : all data missing
Severe: obs_number=0, expected range: 3900.69 5933.77
GOES-16 AMV CLOUDY WV3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HP : out of range
1 times in the last 10 days for at least one item
Slight: stdev_press=26.4156, expected range: 27.7952 30.0382
Geostationary CSR
All GOES-17 GEOS RADIANCES ALL CHANNELS Global : all data missing
Severe: obs_number=0, expected range: 27615.09 113721.66