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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-09-23 12:00

amsua
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 11 : out of range
Considerable: avg_biascorr=-0.2988, expected range: -0.8573 -0.4936
airs
AQUA AIRS RADIANCES CHANNEL 93 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0973, expected range: -0.0672 -0.0521
AQUA AIRS RADIANCES CHANNEL 99 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0287, expected range: 0.0494 0.0647
AQUA AIRS RADIANCES CHANNEL 104 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0334, expected range: 0.0535 0.0617
AQUA AIRS RADIANCES CHANNEL 105 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1198, expected range: 0.1360 0.1532
AQUA AIRS RADIANCES CHANNEL 110 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0171, expected range: 0.0322 0.0510
AQUA AIRS RADIANCES CHANNEL 111 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0654, expected range: -0.0449 -0.0291
AQUA AIRS RADIANCES CHANNEL 123 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1069, expected range: -0.0793 -0.0662
AQUA AIRS RADIANCES CHANNEL 128 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0250, expected range: 0.0652 0.0920
Severely_persistent: avg_biascorr=-0.0154, expected range: -0.1120 -0.0912
Severely_persistent: avg_biascorr=0.0093, expected range: -0.5749 -0.2573
AQUA AIRS RADIANCES CHANNEL 129 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1199, expected range: -0.0794 -0.0643
Severely_persistent: avg_biascorr=-0.1236, expected range: -0.2053 -0.1726
Severely_persistent: avg_biascorr=-0.0104, expected range: -0.4744 -0.2264
AQUA AIRS RADIANCES CHANNEL 69 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4351, expected range: -0.9214 -0.6594
AQUA AIRS RADIANCES CHANNEL 138 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1352, expected range: -0.2690 -0.0992
AQUA AIRS RADIANCES CHANNEL 1869 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2006, expected range: 0.2395 0.2461
mwhs2
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 5 : out of range
Considerable: avg_biascorr=-0.6258, expected range: -0.3524 0.0964
Atmospheric Motion Vector
GOES-17 AMV VIS1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range
Considerable: stdev_fgdepar=1.3402, expected range: 1.1173 1.2377
Slight: avg_fgdepar=1.8634, expected range: 1.6824 1.7830