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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-08-16 06:00

amsua
NOAA-18 AMSUA ALL SKY RADIANCES CHANNEL 10 : out of range
Severe: avg_biascorr=-0.6694, expected range: -0.8996 -0.7887
NOAA-18 AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
Severe: avg_biascorr=-0.3447, expected range: -0.6359 -0.4912
NOAA-18 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
Severe: avg_biascorr=-0.2761, expected range: -0.5987 -0.4244
iasi
METOP-B IASI RADIANCES CHANNEL 258 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0867, expected range: -0.1033 -0.0966
METOP-B IASI RADIANCES CHANNEL 269 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1646, expected range: -0.1895 -0.1786
METOP-B IASI RADIANCES CHANNEL 273 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1489, expected range: -0.1719 -0.1642
METOP-B IASI RADIANCES CHANNEL 272 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1770, expected range: -0.1997 -0.1962
METOP-B IASI RADIANCES CHANNEL 314 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0038, expected range: 0.0659 0.1359
METOP-B IASI RADIANCES CHANNEL 369 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1217, expected range: -0.0758 -0.0229
METOP-C IASI RADIANCES CHANNEL 256 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0505, expected range: 0.0803 0.1178
METOP-C IASI RADIANCES CHANNEL 314 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0404, expected range: 0.0193 0.0923
METOP-C IASI RADIANCES CHANNEL 369 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1367, expected range: -0.0946 -0.0494
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=-0.1329, expected range: -0.1564 -0.1457
METOP-B IASI RADIANCES CHANNEL 193 : out of range
Severe: avg_biascorr=-0.2391, expected range: -0.1729 -0.0978
METOP-B IASI RADIANCES CHANNEL 199 : out of range
Severe: avg_biascorr=-0.4331, expected range: -0.3559 -0.2592
METOP-B IASI RADIANCES CHANNEL 205 : out of range
Severe: avg_biascorr=-0.4675, expected range: -0.3948 -0.3027
METOP-B IASI RADIANCES CHANNEL 212 : out of range
Severe: avg_biascorr=-0.3920, expected range: -0.3379 -0.2670
METOP-B IASI RADIANCES CHANNEL 306 : out of range
Severe: avg_biascorr=-0.7674, expected range: -0.6855 -0.5900
METOP-B IASI RADIANCES (102 channels affected) : out of range
Severe: avg_biascorr=0.5343, expected range: 0.4096 0.4709
METOP-B IASI RADIANCES (23 channels affected) : out of range
Considerable: avg_biascorr=0.2461, expected range: 0.2700 0.3134
METOP-C IASI RADIANCES (160 channels affected) : out of range
Considerable: obs_number=623.0000, expected range: 2509.2892 3854.9461
cris
All NPP CRIS ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 6119.64 8987.71
NOAA20 CRIS RADIANCES CHANNEL 949 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2103, expected range: -0.1890 -0.1740
NOAA20 CRIS RADIANCES CHANNEL 963 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0865, expected range: -0.0651 -0.0578
NOAA20 CRIS RADIANCES CHANNEL 965 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2961, expected range: -0.2549 -0.2419
NOAA20 CRIS RADIANCES CHANNEL 989 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0209, expected range: 0.0564 0.0603
NOAA20 CRIS RADIANCES CHANNEL 993 : out of range
33 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1843, expected range: 0.1992 0.2162
NOAA20 CRIS RADIANCES CHANNEL 62 : out of range
38 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1960, expected range: 0.2233 0.2286
NOAA20 CRIS RADIANCES CHANNEL 65 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1966, expected range: 0.2159 0.2289
NOAA20 CRIS RADIANCES CHANNEL 108 : out of range
30 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0150, expected range: 0.0238 0.0732
NOAA20 CRIS RADIANCES CHANNEL 118 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2681, expected range: -0.1545 -0.1303
NOAA20 CRIS RADIANCES CHANNEL 140 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3358, expected range: -0.2885 -0.2576
airs
AQUA AIRS RADIANCES CHANNEL 672 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0550, expected range: 0.0605 0.0668
AQUA AIRS RADIANCES CHANNEL 201 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1551, expected range: -0.1817 -0.1670
AQUA AIRS RADIANCES CHANNEL 207 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0580, expected range: -0.0826 -0.0734
atms
All NPP ATMS ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 3718.26 8980.61
gpsro
METOP-B GRAS SETTING (23 impact heights affected) : out of range
1 times in the last 10 days for at least one item
Slight: obs_number=759.0000, expected range: 1001.9126 1438.0874
Atmospheric Motion Vector
All NPP VIIRS AMV IR ALL LAYERS Global : all data missing
Severely_persistent: obs_number=0, expected range: 668.88 1548.46
METOP-C AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range
1 times in the last 10 days for at least one item
Slight: avg_fgdepar=2.9787, expected range: 3.1481 3.4783
resat
AURA OMI OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-3.4215, expected range: -1.9682 -1.1652
Severely_persistent: avg_biascorr=-5.2275, expected range: -3.9705 -3.8893
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=32.0000, expected range: 50.8555 56.5799
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=2.3747, expected range: 1.5999 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=0.0089, expected range: -0.0185 -0.0183
METOP-B GOME-2 OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
3 times in the last 10 days for at least one item
Slight: obs_number=26746.0000, expected range: 15201.2021 24241.8471