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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-11-24 18:00

iasi
METOP-B IASI RADIANCES CHANNEL 290 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0732, expected range: 0.0910 0.1034
METOP-B IASI RADIANCES CHANNEL 1639 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1059, expected range: -0.0019 0.0546
METOP-C IASI RADIANCES CHANNEL 290 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0496, expected range: 0.0681 0.0787
METOP-C IASI RADIANCES CHANNEL 292 : out of range
30 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0734, expected range: -0.0537 -0.0406
METOP-C IASI RADIANCES CHANNEL 369 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1563, expected range: -0.1392 -0.1205
METOP-C IASI RADIANCES CHANNEL 426 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1361, expected range: -0.1255 -0.1162
METOP-C IASI RADIANCES CHANNEL 1513 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0152, expected range: -0.0529 -0.0146
METOP-C IASI RADIANCES CHANNEL 1521 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0464, expected range: -0.1119 -0.0870
METOP-B IASI RADIANCES (29 channels affected) : out of range
2 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.0352, expected range: -0.1165 -0.0764
METOP-C IASI RADIANCES (30 channels affected) : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.1106, expected range: -0.1807 -0.1480
METOP-B IASI RADIANCES CHANNEL 369 : out of range
1 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.1383, expected range: -0.1270 -0.1051
cris
NOAA20 CRIS RADIANCES CHANNEL 121 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0045, expected range: 0.0432 0.0898
NOAA20 CRIS RADIANCES CHANNEL 48 : out of range
3 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.1202, expected range: 0.0955 0.1111
airs
AQUA AIRS RADIANCES CHANNEL 201 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1389, expected range: -0.1195 -0.1048
AQUA AIRS RADIANCES CHANNEL 210 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0574, expected range: -0.0465 -0.0360
AQUA AIRS RADIANCES CHANNEL 256 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2558, expected range: -0.2367 -0.2256
atms
NPP ATMS RADIANCES CHANNEL 13 : out of range
38 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4213, expected range: -0.2918 -0.2172
Severely_persistent: avg_biascorr=-0.0703, expected range: -0.3765 -0.2363
NPP ATMS RADIANCES CHANNEL 14 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1849, expected range: -0.0884 0.0116
NPP ATMS RADIANCES CHANNEL 12 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1437, expected range: -0.3706 -0.2732
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
40 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4606, expected range: 0.3289 0.4014
Severely_persistent: avg_biascorr=-0.4666, expected range: -0.3951 -0.3413
NOAA20 ATMS RADIANCES CHANNEL 15 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.7980, expected range: 0.5395 0.6617
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5935, expected range: -0.4598 -0.4083
Severely_persistent: avg_biascorr=-0.1846, expected range: -0.5004 -0.3344
ssmis
DMSP-17 SSMIS RADIANCES CHANNEL 10 : out of range
Considerable: obs_number=3136.0000, expected range: 3567.4450 4991.2772
DMSP-17 SSMIS RADIANCES CHANNEL 13 : out of range
Considerable: obs_number=2315.0000, expected range: 2650.0742 3980.7591
DMSP-17 SSMIS RADIANCES CHANNEL 14 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=2311.0000, expected range: 2657.9560 3963.6552
DMSP-17 SSMIS RADIANCES CHANNEL 16 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=2304.0000, expected range: 2643.9867 3957.3466
scatt
All HY-2B SCATTEROMETER Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 134641.20
resat
AURA OMI OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.6512, expected range: -4.8322 -2.8947
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=0.0089, expected range: 0.0064 0.0135
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1-2 (HPA) : out of range
64 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.0254, expected range: 0.0115 0.0115
amdar
AMDAR TEMPERATURE (K) PRESSURE LAYER 0-300 (HPA) : out of range
1 times in the last 10 days for at least one item
Severe: rms_fgdepar=3.9292, expected range: 0.2931 1.1662