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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-11-22 00:00

amsua
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6695, expected range: 0.5372 0.5886
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7083, expected range: 0.5316 0.5914
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6816, expected range: 0.5312 0.6041
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6527, expected range: 0.5223 0.5871
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6871, expected range: 0.5222 0.5903
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6192, expected range: 0.5000 0.5435
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6643, expected range: 0.4909 0.5504
iasi
METOP-B IASI RADIANCES CHANNEL 1626 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1386, expected range: 0.0797 0.1101
METOP-C IASI RADIANCES (34 channels affected) : out of range
Severe: stdev_fgdepar=0.2236, expected range: 0.2559 0.2713
METOP-C IASI RADIANCES (22 channels affected) : out of range
Severe: avg_biascorr=0.5663, expected range: 0.3086 0.3867
METOP-B IASI RADIANCES (70 channels affected) : out of range
Considerable: obs_number=1954.0000, expected range: 2111.8067 2613.2105
cris
NOAA20 CRIS RADIANCES CHANNEL 963 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0215, expected range: -0.0221 -0.0215
Slight: obs_number=5888.0000, expected range: 6045.9465 6545.6708
NOAA20 CRIS RADIANCES CHANNEL 965 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1761, expected range: -0.2327 -0.2076
Slight: obs_number=5691.0000, expected range: 5857.8449 6331.6631
NOAA20 CRIS RADIANCES CHANNEL 67 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2614, expected range: 0.0958 0.1845
NOAA20 CRIS RADIANCES CHANNEL 72 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1189, expected range: -0.0287 0.0262
NOAA20 CRIS RADIANCES CHANNEL 981 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5699, expected range: -0.5113 -0.4432
Slight: obs_number=6386.0000, expected range: 6695.9922 7179.0087
NOAA20 CRIS RADIANCES CHANNEL 93 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0073, expected range: -0.0491 -0.0224
NOAA20 CRIS RADIANCES (27 channels affected) : out of range
Severe: stdev_fgdepar=0.2194, expected range: 0.1707 0.1836
NOAA20 CRIS RADIANCES CHANNEL 78 : out of range
4 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0467, expected range: -0.0629 -0.0011
NOAA20 CRIS RADIANCES CHANNEL 69 : out of range
4 times in the last 10 days for at least one item
Considerable: avg_biascorr=0.2112, expected range: 0.0834 0.1618
NOAA20 CRIS RADIANCES CHANNEL 75 : out of range
4 times in the last 10 days for at least one item
Considerable: avg_biascorr=0.0598, expected range: -0.0812 0.0052
NOAA20 CRIS RADIANCES CHANNEL 989 : out of range
3 times in the last 10 days for at least one item
Slight: obs_number=5779.0000, expected range: 5994.3853 6411.1678
NOAA20 CRIS RADIANCES CHANNEL 991 : out of range
3 times in the last 10 days for at least one item
Slight: obs_number=5836.0000, expected range: 6060.3421 6475.3087
NOAA20 CRIS RADIANCES CHANNEL 993 : out of range
3 times in the last 10 days for at least one item
Slight: obs_number=5947.0000, expected range: 6151.4626 6636.9998
NOAA20 CRIS RADIANCES CHANNEL 1005 : out of range
7 times in the last 10 days for at least one item
Slight: obs_number=6676.0000, expected range: 7068.0857 7559.9839
NOAA20 CRIS RADIANCES CHANNEL 1029 : out of range
7 times in the last 10 days for at least one item
Slight: obs_number=6537.0000, expected range: 6887.0788 7392.2734
NOAA20 CRIS RADIANCES CHANNEL 1061 : out of range
7 times in the last 10 days for at least one item
Slight: obs_number=6959.0000, expected range: 7411.8678 7908.3759
NOAA20 CRIS RADIANCES CHANNEL 1085 : out of range
7 times in the last 10 days for at least one item
Slight: obs_number=6849.0000, expected range: 7247.8970 7764.5378
airs
AQUA AIRS RADIANCES (18 channels affected) : out of range
Severe: stdev_fgdepar=0.7268, expected range: 0.8528 0.9236
AQUA AIRS RADIANCES (14 channels affected) : out of range
Considerable: avg_biascorr=-0.0846, expected range: -0.0396 0.0383
amsr2
AMSR2 GCOM-W1 ALLSKY RADIANCES CHANNEL 9 : out of range
Considerable: obs_number=3153.0000, expected range: 3375.3156 4206.4344
AMSR2 GCOM-W1 ALLSKY RADIANCES CHANNEL 10 : out of range
Considerable: obs_number=3143.0000, expected range: 3367.9712 4206.7788
AMSR2 GCOM-W1 ALLSKY RADIANCES CHANNEL 13 : out of range
Considerable: obs_number=3161.0000, expected range: 3382.5715 4199.5535
atms
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3118, expected range: 0.2570 0.2813
NPP ATMS RADIANCES (7 channels affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=3630.0000, expected range: 2958.3649 3488.8851
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.5054, expected range: 0.3628 0.4529
ssmis
DMSP-17 SSMIS RADIANCES CHANNEL 5 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0042, expected range: 0.0034 0.0037
DMSP-17 SSMIS RADIANCES CHANNEL 7 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0052, expected range: 0.0034 0.0044
Atmospheric Motion Vector
HIMAWARI-8 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range
Considerable: obs_number=1910.0000, expected range: 1010.5081 1606.9919
amdar
AMDAR WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: obs_number=744.0000, expected range: 69.5258 493.3492
Considerable: obs_number=1301.0000, expected range: 171.0475 904.0775