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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2020-05-26 12:00

amsua
NOAA-15 AMSUA RADIANCES CHANNEL 13 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3048, expected range: -0.3806 -0.3587
NOAA-15 AMSUA RADIANCES CHANNEL 8 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0829, expected range: -0.0726 -0.0676
NOAA-15 AMSUA RADIANCES CHANNEL 8 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1795, expected range: 0.2088 0.2355
NOAA-18 AMSUA RADIANCES CHANNEL 9 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.6407, expected range: -0.5917 -0.5659
NOAA-18 AMSUA RADIANCES CHANNEL 5 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2750, expected range: 0.3359 0.3786
NOAA-19 AMSUA RADIANCES CHANNEL 5 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0355, expected range: -0.0142 0.0006
NOAA-19 AMSUA RADIANCES CHANNEL 5 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0297, expected range: 0.0572 0.0707
NOAA-19 AMSUA RADIANCES CHANNEL 4 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-0.1721, expected range: -0.0943 -0.0821
METOP-A AMSUA RADIANCES CHANNEL 9 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0083, expected range: 0.0375 0.0728
AQUA AMSUA RADIANCES CHANNEL 13 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0987, expected range: -0.1759 -0.1341
METOP-B AMSUA RADIANCES CHANNEL 13 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0638, expected range: -0.1004 -0.0865
METOP-B AMSUA RADIANCES CHANNEL 7 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4234, expected range: -0.3848 -0.3780
METOP-C AMSUA RADIANCES CHANNEL 9 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4288, expected range: -0.3921 -0.3844
METOP-C AMSUA RADIANCES CHANNEL 10 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0607, expected range: 0.0181 0.0634
AQUA AMSUA RADIANCES CHANNEL 8 : out of range
3 times in the last 10 days for at least one item
Considerable: avg_biascorr=0.0811, expected range: 0.1023 0.1433
iasi
METOP-A IASI RADIANCES CHANNEL 1536 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2183, expected range: 0.2652 0.2977
METOP-B IASI RADIANCES CHANNEL 217 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1087, expected range: -0.0991 -0.0957
METOP-B IASI RADIANCES (19 channels affected) : out of range
Severe: avg_biascorr=0.0100, expected range: 0.0332 0.0525
METOP-C IASI RADIANCES (21 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.0382, expected range: -0.0048 0.0053
cris
NPP CRIS RADIANCES CHANNEL 36 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2313, expected range: 0.2699 0.2882
NPP CRIS RADIANCES CHANNEL 42 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2706, expected range: 0.3087 0.3314
NPP CRIS RADIANCES CHANNEL 48 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2512, expected range: 0.2969 0.3148
NPP CRIS RADIANCES CHANNEL 51 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2493, expected range: 0.2957 0.3148
NPP CRIS RADIANCES CHANNEL 143 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0853, expected range: -0.0804 -0.0741
NOAA20 CRIS RADIANCES CHANNEL 33 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1423, expected range: 0.1623 0.1648
NPP CRIS RADIANCES (46 channels affected) : out of range
Severe: obs_number=19318.0000, expected range: 21970.3156 22780.9785
NPP CRIS RADIANCES CHANNEL 62 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.1743, expected range: 0.1917 0.2137
NPP CRIS RADIANCES CHANNEL 64 : out of range
2 times in the last 10 days for at least one item
Severe: avg_biascorr=0.1206, expected range: 0.1467 0.1577
NPP CRIS RADIANCES CHANNEL 65 : out of range
2 times in the last 10 days for at least one item
Severe: avg_biascorr=0.1410, expected range: 0.1581 0.1775
NPP CRIS RADIANCES (47 channels affected) : out of range
Severe: obs_number=19333.0000, expected range: 21973.3062 22779.3997
NPP CRIS RADIANCES CHANNEL 69 : out of range
1 times in the last 10 days for at least one item
Considerable: avg_biascorr=0.0945, expected range: 0.1096 0.1334
NPP CRIS RADIANCES CHANNEL 71 : out of range
1 times in the last 10 days for at least one item
Considerable: avg_biascorr=0.0913, expected range: 0.1038 0.1250
airs
AQUA AIRS RADIANCES CHANNEL 201 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3535, expected range: -0.2794 -0.2792
AQUA AIRS RADIANCES CHANNEL 295 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.8651, expected range: -0.8021 -0.7454
AQUA AIRS RADIANCES CHANNEL 232 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.7442, expected range: -0.6679 -0.6210
AQUA AIRS RADIANCES CHANNEL 256 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.6066, expected range: -0.5372 -0.4756
mwhs2
FY-3D MWHS2 ALLSKY RADIANCES (11 channels affected) : out of range
Severe: obs_number=33662.0000, expected range: 54284.8608 56939.2568
Severe: obs_number=33463.0000, expected range: 54020.4761 56762.9357
atms
NPP ATMS RADIANCES (10 channels affected) : out of range
Slight: obs_number=23640.0000, expected range: 25621.0889 29617.6170
Slight: obs_number=23709.0000, expected range: 25599.3514 29818.2956
Atmospheric Motion Vector
AQUA MODIS CLEAR WV WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA : out of range
Slight: obs_number=128.0000, expected range: 396.3043 1233.3990
NPP VIIRS AMV IR WIND VECTOR DIFF (M/S) (2 pressure layers affected) : out of range
Slight: obs_number=106.0000, expected range: 882.0772 2765.3660
Slight: obs_number=109.0000, expected range: 1115.0244 2775.8806
NOAA20 VIIRS-AMV IR WIND VECTOR DIFF (M/S) (2 pressure layers affected : out of range
Slight: obs_number=179.0000, expected range: 1072.4326 2946.0674
Slight: obs_number=178.0000, expected range: 1078.3958 2942.3542
GOES-17 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
2 times in the last 10 days for at least one item
Slight: obs_number=2743.0000, expected range: 967.8491 2352.4009
Slight: obs_number=2733.0000, expected range: 962.4139 2363.8361
mwri
FY-3D MWRI RADIANCES (6 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=8229.0000, expected range: 15055.3705 15578.6295
Considerable: obs_number=8244.0000, expected range: 13724.1788 16613.5859
Radiosondes
All LAND TEMP ALL LAYERS WMO BLOCK 43 : all data missing
Severely_persistent: obs_number=0, expected range: 57.33 141.47
HIGH RESO LAND TEMP Q (G/KG) (3 pressure layers affected) : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=131.0000, expected range: 191.8406 202.3816
Considerable: obs_number=59.0000, expected range: 170.8998 204.6002
Considerable: obs_number=60.0000, expected range: 170.3715 205.0285
HIGH RESO LAND TEMP Q (G/KG) PRESSURE LAYER 0-300 (HPA) : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=463.0000, expected range: 522.5000 537.5000