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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-08-18 18:00

iasi
METOP-B IASI RADIANCES CHANNEL 1585 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0394, expected range: 0.0587 0.0831
METOP-B IASI RADIANCES CHANNEL 258 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0884, expected range: -0.1018 -0.0966
METOP-B IASI RADIANCES CHANNEL 269 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1652, expected range: -0.1890 -0.1786
METOP-B IASI RADIANCES CHANNEL 273 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1463, expected range: -0.1681 -0.1642
METOP-B IASI RADIANCES CHANNEL 292 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0976, expected range: -0.1153 -0.1084
METOP-B IASI RADIANCES CHANNEL 154 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2185, expected range: 0.2446 0.2679
METOP-B IASI RADIANCES CHANNEL 159 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2570, expected range: 0.2816 0.3070
METOP-B IASI RADIANCES CHANNEL 161 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2315, expected range: 0.2561 0.2748
METOP-B IASI RADIANCES CHANNEL 1639 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1345, expected range: -0.1017 -0.0849
METOP-C IASI RADIANCES CHANNEL 1585 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0187, expected range: 0.0396 0.0649
METOP-C IASI RADIANCES CHANNEL 258 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1327, expected range: -0.1588 -0.1457
METOP-C IASI RADIANCES CHANNEL 260 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0888, expected range: -0.1104 -0.0988
METOP-C IASI RADIANCES CHANNEL 262 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0606, expected range: -0.0794 -0.0701
METOP-C IASI RADIANCES CHANNEL 273 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1721, expected range: -0.1967 -0.1936
METOP-C IASI RADIANCES CHANNEL 292 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1165, expected range: -0.1343 -0.1283
METOP-C IASI RADIANCES CHANNEL 141 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1884, expected range: 0.2193 0.2497
METOP-C IASI RADIANCES CHANNEL 148 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2003, expected range: 0.2313 0.2625
METOP-C IASI RADIANCES CHANNEL 154 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1882, expected range: 0.2219 0.2418
METOP-C IASI RADIANCES CHANNEL 159 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2279, expected range: 0.2571 0.2815
METOP-C IASI RADIANCES CHANNEL 161 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2031, expected range: 0.2281 0.2486
METOP-C IASI RADIANCES CHANNEL 1658 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0167, expected range: 0.0399 0.0542
cris
All NPP CRIS ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 6116.72 8997.57
NOAA20 CRIS RADIANCES CHANNEL 989 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0411, expected range: 0.0564 0.0662
NOAA20 CRIS RADIANCES CHANNEL 62 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1974, expected range: 0.2233 0.2280
NOAA20 CRIS RADIANCES CHANNEL 65 : out of range
30 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1942, expected range: 0.2159 0.2323
NOAA20 CRIS RADIANCES CHANNEL 118 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2415, expected range: -0.1545 -0.0969
airs
AQUA AIRS RADIANCES CHANNEL 672 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0514, expected range: 0.0605 0.0682
AQUA AIRS RADIANCES CHANNEL 218 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0805, expected range: -0.0961 -0.0879
Severely_persistent: avg_biascorr=-0.0420, expected range: -0.0788 -0.0597
AQUA AIRS RADIANCES CHANNEL 207 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0608, expected range: -0.0830 -0.0734
AQUA AIRS RADIANCES CHANNEL 227 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0478, expected range: -0.0823 -0.0629
gpsro
All COSMIC2-E5 GPSRO RISING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 450.01 1688.03
Atmospheric Motion Vector
All NPP VIIRS AMV IR ALL LAYERS Global : all data missing
Severely_persistent: obs_number=0, expected range: 689.29 1551.78
GOES-17 AMV VIS1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=5244.0000, expected range: 7721.5861 9888.4139
scatt
All HY-2B SCATTEROMETER Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 136228.67
resat
AURA OMI OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
68 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-3.0127, expected range: -1.9682 -1.1352
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=2.5904, expected range: 1.5439 1.9796
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 250-251 (HPA) : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.3462, expected range: 0.0026 0.1883