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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-07-15 00:00

amsua
NOAA-18 AMSUA RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.1153, expected range: 0.9404 1.0161
NOAA-19 AMSUA RADIANCES CHANNEL 13 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6452, expected range: 0.5644 0.5930
NOAA-19 AMSUA RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.1250, expected range: 0.9441 1.0239
METOP-A AMSUA RADIANCES CHANNEL 14 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.1526, expected range: 1.0026 1.0763
METOP-B AMSUA RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.1106, expected range: 0.9515 1.0048
METOP-C AMSUA RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.0909, expected range: 0.9556 0.9838
iasi
METOP-A IASI RADIANCES CHANNEL 101 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4784, expected range: 0.3978 0.4301
METOP-A IASI RADIANCES CHANNEL 176 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3920, expected range: 0.3308 0.3593
METOP-A IASI RADIANCES (27 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0494, expected range: 0.0678 0.0911
METOP-A IASI RADIANCES CHANNEL 303 : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.4275, expected range: 0.3402 0.3762
METOP-B IASI RADIANCES (28 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0931, expected range: 0.1402 0.1403
METOP-C IASI RADIANCES (29 channels affected) : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0140, expected range: 0.0426 0.0548
cris
NOAA20 CRIS RADIANCES CHANNEL 20 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0331, expected range: 0.0700 0.0712
NOAA20 CRIS RADIANCES CHANNEL 42 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1337, expected range: 0.1561 0.1645
NOAA20 CRIS RADIANCES CHANNEL 981 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0869, expected range: -0.1137 -0.1083
NOAA20 CRIS RADIANCES CHANNEL 33 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2414, expected range: 0.1845 0.2098
NOAA20 CRIS RADIANCES CHANNEL 63 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1619, expected range: 0.1382 0.1503
NOAA20 CRIS RADIANCES CHANNEL 64 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1553, expected range: 0.1327 0.1424
NOAA20 CRIS RADIANCES CHANNEL 113 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.1799, expected range: 0.1282 0.1616
NOAA20 CRIS RADIANCES CHANNEL 1117 : out of range
4 times in the last 10 days for at least one item
Considerable: obs_number=625.0000, expected range: 102.9120 518.3161
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=0.0350, expected range: 0.0565 0.0683
AQUA AIRS RADIANCES CHANNEL 20 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1143, expected range: -0.0532 -0.0224
AQUA AIRS RADIANCES CHANNEL 92 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4661, expected range: -0.4090 -0.3925
AQUA AIRS RADIANCES CHANNEL 104 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2411, expected range: -0.1800 -0.1607
AQUA AIRS RADIANCES CHANNEL 110 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2162, expected range: -0.1655 -0.1401
AQUA AIRS RADIANCES CHANNEL 116 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2648, expected range: -0.2181 -0.1768
AQUA AIRS RADIANCES CHANNEL 180 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.7877, expected range: -0.7228 -0.6831
Atmospheric Motion Vector
NOAA-19 AVHRR IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=432.0000, expected range: 28.2594 263.9074
HIMAWARI-8 AMV VIS1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA : out of range
Slight: obs_number=6013.0000, expected range: 6393.5735 6941.4265