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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-11-27 06:00

amsua
NOAA 18 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=0.6738, expected range: 0.5141 0.6006
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
33 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6772, expected range: 0.5279 0.5844
METOP-C 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=0.6050, expected range: 0.4909 0.5526
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
3 times in the last 10 days for at least one item
Considerable: stdev_norm_fgdepar=0.6669, expected range: 0.5111 0.6096
iasi
METOP-B IASI RADIANCES CHANNEL 1639 : out of range
29 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0875, expected range: 0.0163 0.0546
METOP-C IASI RADIANCES CHANNEL 292 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0711, expected range: -0.0537 -0.0416
METOP-C IASI RADIANCES CHANNEL 290 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0533, expected range: 0.0681 0.0843
METOP-C IASI RADIANCES (34 channels affected) : out of range
Severe: avg_biascorr=-0.1106, expected range: -0.1815 -0.1480
METOP-B IASI RADIANCES (37 channels affected) : out of range
3 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.0509, expected range: -0.1198 -0.0764
METOP-B IASI RADIANCES CHANNEL 546 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.4771, expected range: 0.2590 0.3984
METOP-B IASI RADIANCES (11 channels affected) : out of range
Considerable: avg_biascorr=0.0803, expected range: 0.0910 0.1091
METOP-C IASI RADIANCES CHANNEL 1626 : out of range
2 times in the last 10 days for at least one item
Considerable: avg_biascorr=0.1508, expected range: 0.1100 0.1345
cris
NOAA20 CRIS RADIANCES CHANNEL 963 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0295, expected range: -0.0986 -0.0713
airs
AQUA AIRS RADIANCES CHANNEL 305 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2309, expected range: -0.1690 -0.0870
AQUA AIRS RADIANCES CHANNEL 1868 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4399, expected range: 0.3393 0.3941
AQUA AIRS RADIANCES CHANNEL 256 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2575, expected range: -0.2367 -0.2225
AQUA AIRS RADIANCES CHANNEL 210 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0577, expected range: -0.0465 -0.0318
AQUA AIRS RADIANCES CHANNEL 201 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1328, expected range: -0.1195 -0.1061
AQUA AIRS RADIANCES CHANNEL 190 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2167, expected range: -0.1996 -0.1909
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=0.8390, expected range: 0.6686 0.7345
NPP ATMS RADIANCES CHANNEL 14 : out of range
50 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.5048, expected range: 0.3887 0.4509
Severely_persistent: avg_biascorr=0.0857, expected range: -0.2099 -0.0619
Severely_persistent: avg_biascorr=-0.1815, expected range: -0.0922 -0.0070
NPP ATMS RADIANCES CHANNEL 13 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0348, expected range: -0.3399 -0.2363
Severely_persistent: avg_biascorr=-0.3786, expected range: -0.2954 -0.2247
NPP ATMS RADIANCES CHANNEL 12 : out of range
38 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0384, expected range: -0.3455 -0.2732
NOAA20 ATMS RADIANCES (5 channels affected) : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0950, expected range: -0.4482 -0.3344
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
70 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3819, expected range: -0.3045 -0.2737
Severely_persistent: stdev_fgdepar=0.4733, expected range: 0.3476 0.4014
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5437, expected range: -0.4549 -0.3849
NOAA20 ATMS RADIANCES CHANNEL 15 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.8154, expected range: 0.5974 0.6617
NPP ATMS RADIANCES (5 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.5783, expected range: -0.4516 -0.3451
Atmospheric Motion Vector
METOP-B AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : out of range
Slight: stdev_press=75.0230, expected range: 83.6150 100.4617
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 20-21 (HPA) : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.0092, expected range: 0.0065 0.0130