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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

Early delivery 4D-VAR at 2021-11-28 00:00

amsua
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6429, expected range: 0.5412 0.5844
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
35 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6272, expected range: 0.5137 0.5526
iasi
METOP-C IASI RADIANCES CHANNEL 426 : out of range
29 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1364, expected range: -0.1255 -0.1200
METOP-C IASI RADIANCES CHANNEL 292 : out of range
35 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0681, expected range: -0.0537 -0.0445
METOP-C IASI RADIANCES CHANNEL 290 : out of range
29 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0550, expected range: 0.0681 0.0821
METOP-B IASI RADIANCES (11 channels affected) : out of range
1 times in the last 10 days for at least one item
Considerable: avg_biascorr=0.0819, expected range: 0.0910 0.1053
METOP-C IASI RADIANCES CHANNEL 457 : out of range
2 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.0418, expected range: -0.0359 -0.0256
cris
NOAA20 CRIS RADIANCES CHANNEL 124 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0971, expected range: -0.0686 -0.0322
NOAA20 CRIS RADIANCES CHANNEL 109 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1300, expected range: -0.0987 -0.0865
NOAA20 CRIS RADIANCES CHANNEL 114 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1462, expected range: 0.0861 0.1160
NOAA20 CRIS RADIANCES CHANNEL 33 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2177, expected range: 0.0994 0.1660
NOAA20 CRIS RADIANCES CHANNEL 963 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0443, expected range: -0.0998 -0.0713
NOAA20 CRIS RADIANCES CHANNEL 912 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2206, expected range: 0.1188 0.1746
NOAA20 CRIS RADIANCES (22 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.1320, expected range: -0.1198 -0.1052
NOAA20 CRIS RADIANCES CHANNEL 64 : out of range
4 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.1440, expected range: 0.0649 0.1159
airs
AQUA AIRS RADIANCES CHANNEL 1471 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-1.3810, expected range: -1.1404 -1.0236
atms
NPP ATMS RADIANCES CHANNEL 15 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.9470, expected range: 0.6932 0.7345
NPP ATMS RADIANCES CHANNEL 14 : out of range
54 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.5581, expected range: 0.4033 0.4509
Severely_persistent: avg_biascorr=0.1283, expected range: -0.1881 -0.0619
Severely_persistent: avg_biascorr=-0.1515, expected range: -0.0922 -0.0194
NPP ATMS RADIANCES CHANNEL 12 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0476, expected range: -0.3359 -0.2732
NPP ATMS RADIANCES CHANNEL 13 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0417, expected range: -0.3229 -0.2363
NOAA20 ATMS RADIANCES (5 channels affected) : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1241, expected range: -0.4334 -0.3344
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
73 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5428, expected range: -0.3951 -0.3663
Severely_persistent: avg_biascorr=-0.3512, expected range: -0.3045 -0.2715
Severely_persistent: stdev_fgdepar=0.5269, expected range: 0.3542 0.4014
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.6629, expected range: -0.4598 -0.4541
NOAA20 ATMS RADIANCES CHANNEL 15 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.9160, expected range: 0.6170 0.6617
NPP ATMS RADIANCES (5 channels affected) : out of range
4 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.4862, expected range: -0.2918 -0.2799
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1-2 (HPA) : out of range
56 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.0252, expected range: 0.0115 0.0115
Slight: avg_fgdepar=-0.0209, expected range: -0.0058 -0.0058