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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-09-27 00:00

airs
AQUA AIRS RADIANCES CHANNEL 92 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2314, expected range: -0.2143 -0.1964
AQUA AIRS RADIANCES CHANNEL 93 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0973, expected range: -0.0672 -0.0565
AQUA AIRS RADIANCES CHANNEL 104 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0208, expected range: 0.0535 0.0597
AQUA AIRS RADIANCES CHANNEL 110 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0093, expected range: 0.0322 0.0360
Severely_persistent: avg_biascorr=-0.0260, expected range: -0.0864 -0.0543
AQUA AIRS RADIANCES CHANNEL 111 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0643, expected range: -0.0449 -0.0404
AQUA AIRS RADIANCES CHANNEL 117 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0048, expected range: 0.0177 0.0332
AQUA AIRS RADIANCES CHANNEL 123 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1072, expected range: -0.0793 -0.0790
AQUA AIRS RADIANCES CHANNEL 69 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1356, expected range: -0.2565 -0.2062
Severely_persistent: avg_biascorr=-0.3418, expected range: -0.9293 -0.6594
AQUA AIRS RADIANCES CHANNEL 116 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0456, expected range: -0.1317 -0.0921
Severely_persistent: avg_biascorr=-0.1782, expected range: -0.1454 -0.1054
AQUA AIRS RADIANCES CHANNEL 129 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1165, expected range: -0.1760 -0.1726
Severely_persistent: avg_biascorr=-0.2717, expected range: -0.2310 -0.2071
AQUA AIRS RADIANCES CHANNEL 138 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0800, expected range: -0.2552 -0.0992
AQUA AIRS RADIANCES CHANNEL 128 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1484, expected range: -0.1200 -0.0878
AQUA AIRS RADIANCES CHANNEL 1869 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1770, expected range: 0.2395 0.2498
mhs
NOAA-19 MHS ALLSKY RADIANCES CHANNEL 4 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=41747.0000, expected range: 45814.7790 49052.3460
NOAA-19 MHS ALLSKY RADIANCES CHANNEL 5 : out of range
2 times in the last 10 days for at least one item
Slight: obs_number=25112.0000, expected range: 27901.2435 30884.2565
mwhs2
All FY-3C MWHS2 ALLSKY ALL CHANNELS Global : all data missing
Severe: obs_number=0, expected range: 3844.69 26364.06
FY-3D MWHS2 ALLSKY RADIANCES (5 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=12215.0000, expected range: 49502.6288 61857.6212
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 11 : out of range
Slight: avg_norm_fgdepar=-0.0126, expected range: -0.0661 -0.0293
ssmis
DMSP-17 SSMIS RADIANCES CHANNEL 17 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-2.5294, expected range: -3.0078 -2.8300