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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

Ensemble Data Assimilation at 2022-05-25 00:00

amsua
NOAA 15 AMSUA ALL SKY RADIANCES CHANNEL 8 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0764, expected range: 0.1690 0.1796
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 11 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.8692, expected range: -0.7907 -0.7123
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 9 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1936, expected range: -0.1376 -0.1243
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 11 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2044, expected range: -0.1380 -0.1134
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 8 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2920, expected range: -0.1685 -0.1637
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 9 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.7045, expected range: -0.6014 -0.5814
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.7312, expected range: -0.5816 -0.4995
iasi
METOP-B IASI RADIANCES CHANNEL 366 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1929, expected range: -0.1594 -0.1285
METOP-C IASI RADIANCES CHANNEL 87 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0836, expected range: 0.1522 0.2009
Severely_persistent: avg_biascorr=-0.4631, expected range: -0.3954 -0.3093
METOP-C IASI RADIANCES CHANNEL 258 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0098, expected range: -0.0364 -0.0230
METOP-C IASI RADIANCES CHANNEL 262 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0614, expected range: 0.0374 0.0401
METOP-C IASI RADIANCES CHANNEL 269 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0691, expected range: -0.0918 -0.0854
METOP-C IASI RADIANCES CHANNEL 222 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0586, expected range: 0.0865 0.1162
METOP-C IASI RADIANCES (70 channels affected) : out of range
Considerable: obs_number=2525.0000, expected range: 2064.5317 2391.4683
METOP-B IASI RADIANCES CHANNEL 135 : out of range
Slight: avg_fgdepar=0.0128, expected range: -0.0076 0.0078
METOP-B IASI RADIANCES CHANNEL 426 : out of range
Slight: avg_fgdepar=0.0439, expected range: 0.0037 0.0306
cris
NOAA20 CRIS RADIANCES CHANNEL 91 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0190, expected range: -0.0397 -0.0307
NOAA20 CRIS RADIANCES CHANNEL 92 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0382, expected range: 0.0126 0.0195
NOAA20 CRIS RADIANCES CHANNEL 94 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0383, expected range: 0.0109 0.0211
NOAA20 CRIS RADIANCES CHANNEL 95 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0677, expected range: 0.0334 0.0454
NOAA20 CRIS RADIANCES CHANNEL 96 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0004, expected range: -0.0448 -0.0272
NOAA20 CRIS RADIANCES CHANNEL 97 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0630, expected range: 0.0209 0.0376
NOAA20 CRIS RADIANCES CHANNEL 108 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0406, expected range: -0.0883 -0.0697
NOAA20 CRIS RADIANCES CHANNEL 101 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1740, expected range: -0.1256 -0.1098
airs
AQUA AIRS RADIANCES CHANNEL 261 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2292, expected range: -0.2139 -0.1942
AQUA AIRS RADIANCES CHANNEL 262 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2082, expected range: -0.1921 -0.1833
AQUA AIRS RADIANCES CHANNEL 210 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0088, expected range: -0.0516 -0.0230
AQUA AIRS RADIANCES CHANNEL 226 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0968, expected range: -0.1566 -0.1327
AQUA AIRS RADIANCES CHANNEL 257 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1790, expected range: -0.2350 -0.2177
Severely_persistent: avg_biascorr=-0.3544, expected range: -0.2875 -0.2679
AQUA AIRS RADIANCES CHANNEL 272 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2670, expected range: -0.2191 -0.1820
AQUA AIRS RADIANCES CHANNEL 295 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2473, expected range: -0.2059 -0.1888
Severely_persistent: avg_biascorr=0.0735, expected range: 0.0176 0.0292
mhs
NOAA-19 MHS ALLSKY RADIANCES CHANNEL 5 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0785, expected range: 0.0077 0.0308
METOP-B MHS ALLSKY RADIANCES CHANNEL 4 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1525, expected range: 0.0645 0.0966
METOP-C MHS ALLSKY RADIANCES CHANNEL 5 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1683, expected range: 0.1128 0.1393
mwhs2
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 11 : out of range
Considerable: obs_number=16058.0000, expected range: 17310.7207 20268.1543
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 12 : out of range
Considerable: obs_number=16063.0000, expected range: 17263.6171 20316.6329
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 13 : out of range
Considerable: obs_number=13109.0000, expected range: 14194.7421 16593.8829
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 15 : out of range
Considerable: obs_number=7724.0000, expected range: 8310.6459 10073.2291
atms
NPP ATMS RADIANCES CHANNEL 19 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0152, expected range: -0.1004 -0.0787
NPP ATMS RADIANCES CHANNEL 21 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3419, expected range: 0.2865 0.2901
NPP ATMS RADIANCES CHANNEL 12 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3847, expected range: -0.3174 -0.2931
NOAA20 ATMS RADIANCES CHANNEL 19 : out of range
1 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2964, expected range: -0.3489 -0.3262
Considerable: obs_number=20074.0000, expected range: 17043.4717 18902.3486
NOAA20 ATMS RADIANCES CHANNEL 20 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1342, expected range: -0.1765 -0.1689
NOAA20 ATMS RADIANCES CHANNEL 21 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0839, expected range: 0.0409 0.0522
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3128, expected range: -0.3681 -0.3552
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1706, expected range: -0.2280 -0.2109
NOAA20 ATMS RADIANCES CHANNEL 12 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4832, expected range: -0.4430 -0.4330
NPP ATMS RADIANCES CHANNEL 18 : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=7113.0000, expected range: 4872.6984 6603.8841
Atmospheric Motion Vector
All AQUA MODIS CLEAR WV ALL LAYERS Global : all data missing
Severe: obs_number=0, expected range: 165.85 790.02
All NPP VIIRS AMV IR ALL LAYERS Global : all data missing
Severe: obs_number=0, expected range: 0.00 807.20
All NOAA20 VIIRS-AMV IR ALL LAYERS Global : all data missing
Severe: obs_number=0, expected range: 0.00 778.54
gbrad
GROUND-BASED RADAR WIND VECTOR DIFF (M/S) : out of range
Considerable: obs_number=5563.0000, expected range: 685.4425 4263.0269