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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-12-04 18:00

amsua
NOAA-18 AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
Considerable: stdev_norm_fgdepar=0.7861, expected range: 0.6529 0.7392
AMSUA Pacific RARS
All NOAA-18 AMSUA ALL SKY CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 6673.08
All NOAA-19 AMSUA ALL SKY CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 3672.60
iasi
METOP-B IASI RADIANCES CHANNEL 1513 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1114, expected range: -0.0838 -0.0721
METOP-B IASI RADIANCES CHANNEL 1521 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1033, expected range: -0.0749 -0.0513
METOP-B IASI RADIANCES CHANNEL 1639 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0144, expected range: 0.0249 0.0336
METOP-B IASI RADIANCES CHANNEL 1652 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1341, expected range: 0.1628 0.1822
METOP-B IASI RADIANCES CHANNEL 254 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0867, expected range: 0.0984 0.1127
METOP-B IASI RADIANCES CHANNEL 214 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2265, expected range: 0.0181 0.1318
METOP-B IASI RADIANCES CHANNEL 222 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1686, expected range: 0.0190 0.1013
METOP-B IASI RADIANCES CHANNEL 278 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0044, expected range: 0.1327 0.2560
METOP-B IASI RADIANCES CHANNEL 284 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0351, expected range: 0.0868 0.1676
METOP-B IASI RADIANCES CHANNEL 286 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0931, expected range: 0.0307 0.1301
METOP-C IASI RADIANCES CHANNEL 1513 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0460, expected range: -0.0163 0.0086
METOP-C IASI RADIANCES CHANNEL 1521 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1108, expected range: -0.0806 -0.0496
METOP-C IASI RADIANCES CHANNEL 1639 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0294, expected range: 0.0686 0.0937
METOP-C IASI RADIANCES CHANNEL 1652 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0597, expected range: 0.1025 0.1229
METOP-C IASI RADIANCES CHANNEL 278 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0556, expected range: 0.0838 0.2163
METOP-C IASI RADIANCES CHANNEL 284 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0698, expected range: 0.0575 0.1336
METOP-C IASI RADIANCES CHANNEL 286 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1545, expected range: -0.0460 0.0702
cris
NPP CRIS RADIANCES CHANNEL 113 : out of range
51 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1477, expected range: 0.0732 0.1079
Severely_persistent: avg_biascorr=0.1279, expected range: 0.0507 0.0897
NPP CRIS RADIANCES CHANNEL 114 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1414, expected range: 0.0742 0.1073
NPP CRIS RADIANCES CHANNEL 65 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0439, expected range: -0.0345 -0.0251
NPP CRIS RADIANCES CHANNEL 26 : out of range
41 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1728, expected range: 0.1935 0.2017
NPP CRIS RADIANCES CHANNEL 20 : out of range
33 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.5182, expected range: 0.2729 0.3237
NPP CRIS RADIANCES CHANNEL 75 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0890, expected range: -0.2065 -0.1320
NPP CRIS RADIANCES CHANNEL 76 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0800, expected range: -0.1178 -0.0720
NPP CRIS RADIANCES CHANNEL 77 : out of range
27 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0363, expected range: -0.2215 -0.0998
NPP CRIS RADIANCES CHANNEL 78 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0541, expected range: -0.1803 -0.0972
NPP CRIS RADIANCES CHANNEL 79 : out of range
27 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0303, expected range: -0.1594 -0.0712
NPP CRIS RADIANCES CHANNEL 86 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1061, expected range: -0.0292 0.0434
NPP CRIS RADIANCES CHANNEL 111 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0276, expected range: -0.1463 -0.0803
NPP CRIS RADIANCES CHANNEL 115 : out of range
31 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2286, expected range: -0.6072 -0.4254
NOAA20 CRIS RADIANCES CHANNEL 1189 : out of range
30 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1305, expected range: 0.0159 0.0736
NOAA20 CRIS RADIANCES CHANNEL 23 : out of range
47 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1875, expected range: 0.1537 0.1692
NOAA20 CRIS RADIANCES CHANNEL 113 : out of range
45 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1576, expected range: 0.0777 0.1003
NOAA20 CRIS RADIANCES CHANNEL 114 : out of range
38 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1556, expected range: 0.0750 0.1004
NOAA20 CRIS RADIANCES CHANNEL 36 : out of range
31 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3309, expected range: 0.2452 0.2812
NOAA20 CRIS RADIANCES CHANNEL 39 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3839, expected range: 0.2900 0.3166
NOAA20 CRIS RADIANCES CHANNEL 42 : out of range
35 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3618, expected range: 0.2893 0.3114
NOAA20 CRIS RADIANCES CHANNEL 45 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3460, expected range: 0.2855 0.2996
NOAA20 CRIS RADIANCES CHANNEL 51 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3125, expected range: 0.2473 0.2562
NOAA20 CRIS RADIANCES CHANNEL 54 : out of range
38 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3159, expected range: 0.2446 0.2513
NOAA20 CRIS RADIANCES CHANNEL 70 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0768, expected range: 0.0243 0.0532
NOAA20 CRIS RADIANCES CHANNEL 71 : out of range
38 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0883, expected range: 0.0521 0.0621
NOAA20 CRIS RADIANCES CHANNEL 147 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0827, expected range: -0.1072 -0.0955
Severely_persistent: avg_biascorr=-0.2856, expected range: -0.1681 -0.1347
NOAA20 CRIS RADIANCES CHANNEL 48 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0399, expected range: 0.1339 0.2433
NOAA20 CRIS RADIANCES CHANNEL 110 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1957, expected range: -0.1603 -0.1195
NOAA20 CRIS RADIANCES CHANNEL 20 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1557, expected range: 0.1867 0.1895
NPP CRIS RADIANCES (16 channels affected) : out of range
Severe: stdev_fgdepar=0.1147, expected range: 0.0803 0.0874
atms
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.5125, expected range: 0.3449 0.4338
gpsro
All TERRASAR-X GPSRO SETTING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 1476.05
Atmospheric Motion Vector
All HIMAWARI-8 AMV CLOUDY WV3 ALL LAYERS Global : all data missing
Severely_persistent: obs_number=0, expected range: 164.67 534.83
scatt
All HY-2B SCATTEROMETER Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 131387.18
resat
METOP-B GOME-2 OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
Slight: obs_number=8634.0000, expected range: 16739.9550 38661.0450