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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-07-22 00:00

amsua
NOAA-15 AMSUA RADIANCES CHANNEL 12 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4051, expected range: 0.3543 0.3821
NOAA-18 AMSUA RADIANCES CHANNEL 11 : out of range
4 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.7413, expected range: -0.7069 -0.6392
iasi
METOP-A IASI RADIANCES CHANNEL 1479 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0406, expected range: -0.0131 0.0103
METOP-A IASI RADIANCES CHANNEL 5480 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2946, expected range: -0.2595 -0.2274
METOP-A IASI RADIANCES CHANNEL 5379 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: obs_number=2576.0000, expected range: 2157.1804 2238.5925
METOP-A IASI RADIANCES CHANNEL 5383 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: obs_number=2791.0000, expected range: 2357.6233 2402.4633
METOP-A IASI RADIANCES CHANNEL 151 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3450, expected range: -0.2865 -0.2640
METOP-C IASI RADIANCES CHANNEL 151 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3734, expected range: -0.3207 -0.3013
METOP-C IASI RADIANCES CHANNEL 252 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5005, expected range: -0.4504 -0.3937
METOP-A IASI RADIANCES (29 channels affected) : out of range
4 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0218, expected range: 0.0678 0.0891
All METOP-B IASI ALL CHANNELS Global : all data missing
Severe: obs_number=0, expected range: 19638.86 25313.81
cris
NOAA20 CRIS RADIANCES CHANNEL 1165 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=942.0000, expected range: 102.5356 735.1029
airs
AQUA AIRS RADIANCES CHANNEL 1123 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0053, expected range: 0.0565 0.0787
AQUA AIRS RADIANCES CHANNEL 92 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4989, expected range: -0.4090 -0.4052
AQUA AIRS RADIANCES CHANNEL 104 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2586, expected range: -0.1800 -0.1727
AQUA AIRS RADIANCES CHANNEL 110 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2015, expected range: -0.1655 -0.1652
AQUA AIRS RADIANCES CHANNEL 116 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3031, expected range: -0.2181 -0.2082
AQUA AIRS RADIANCES CHANNEL 128 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1872, expected range: -0.1589 -0.1277
AQUA AIRS RADIANCES CHANNEL 180 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.8115, expected range: -0.7228 -0.7002
atms
NPP ATMS RADIANCES CHANNEL 12 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3375, expected range: -0.3065 -0.2931
gpsro
COSMIC2-E5 GPSRO SETTING (5 impact heights affected) : out of range
Considerable: obs_number=368.0000, expected range: 507.2375 911.5125
COSMIC2-E6 GPSRO SETTING (24 impact heights affected) : out of range
Considerable: obs_number=954.0000, expected range: 1153.2378 1838.3872
Atmospheric Motion Vector
METEOSAT-8 AMV CLOUDY WV2 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 : out of range
Considerable: obs_number=494.0000, expected range: 104.5150 345.6742
HIMAWARI-8 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: obs_number=7231.0000, expected range: 9929.3307 13557.9193
GOES-16 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range
Considerable: obs_number=1302.0000, expected range: 1672.3652 2113.3848
scatt
METOP-A ASCAT WIND VECTOR DIFF (M/S) : out of range
Severe: obs_number=14908.0000, expected range: 31701.7934 38095.7066