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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-08-15 06:00

iasi
METOP-B IASI RADIANCES CHANNEL 258 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0865, expected range: -0.1023 -0.0966
METOP-B IASI RADIANCES CHANNEL 269 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1618, expected range: -0.1899 -0.1786
METOP-B IASI RADIANCES CHANNEL 272 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1751, expected range: -0.2029 -0.1962
METOP-B IASI RADIANCES CHANNEL 273 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1475, expected range: -0.1728 -0.1642
METOP-B IASI RADIANCES CHANNEL 292 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1005, expected range: -0.1159 -0.1084
METOP-B IASI RADIANCES CHANNEL 1639 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1365, expected range: -0.1017 -0.0888
METOP-B IASI RADIANCES CHANNEL 1658 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0173, expected range: 0.0620 0.0660
METOP-C IASI RADIANCES CHANNEL 273 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1772, expected range: -0.2037 -0.1936
METOP-C IASI RADIANCES CHANNEL 1658 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0251, expected range: 0.0399 0.0420
cris
All NPP CRIS ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 6111.82 8979.24
NOAA20 CRIS RADIANCES CHANNEL 963 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0814, expected range: -0.0651 -0.0592
NOAA20 CRIS RADIANCES CHANNEL 965 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2762, expected range: -0.2549 -0.2398
NOAA20 CRIS RADIANCES CHANNEL 989 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0321, expected range: 0.0564 0.0627
NOAA20 CRIS RADIANCES CHANNEL 993 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2177, expected range: 0.2439 0.2474
NOAA20 CRIS RADIANCES CHANNEL 62 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1985, expected range: 0.2233 0.2319
NOAA20 CRIS RADIANCES CHANNEL 118 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2126, expected range: -0.1545 -0.1245
airs
AQUA AIRS RADIANCES CHANNEL 672 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0555, expected range: 0.0605 0.0671
AQUA AIRS RADIANCES CHANNEL 207 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0586, expected range: -0.0833 -0.0734
atms
All NPP ATMS ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 3724.11 8948.40
gpsro
All KOMPSAT-5 GPSRO SETTING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 41.40 610.12
Atmospheric Motion Vector
All NPP VIIRS AMV IR ALL LAYERS Global : all data missing
Severely_persistent: obs_number=0, expected range: 641.66 1558.47
resat
AURA OMI OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-4.2458, expected range: -3.2928 -2.1827
NOAA-19 SBUV OZONE, TOP (21 pressure layers affected) : out of range
38 times in the last 10 days for at least one item
Severely_persistent: obs_number=31.0000, expected range: 50.8555 55.0103
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1010-1011 (HPA) : out of range
38 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=2.3577, expected range: 1.6043 1.9796
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 60-61 (HPA) : out of range
38 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0259, expected range: -0.0241 -0.0183
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 250-251 (HPA) : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.4428, expected range: 0.0033 0.1883