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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

Early delivery 4D-VAR at 2022-01-18 06:00

amsua
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2011, expected range: 0.2350 0.2512
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3234, expected range: -0.2883 -0.2834
mwhs2
FY-3D MWHS2 ALLSKY RADIANCES (5 channels affected) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0806, expected range: 0.7575 0.8872
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 4 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-3.4396, expected range: -2.7387 -2.1202
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 5 : out of range
41 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-1.8098, expected range: -0.4184 0.1275
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 6 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0185, expected range: 1.6101 2.2290
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 2 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-4.4560, expected range: -1.9393 -1.0851
Severely_persistent: avg_biascorr=-4.5170, expected range: -2.4612 -1.0930
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 3 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0241, expected range: 0.4791 0.9323
Severely_persistent: stdev_norm_fgdepar=0.0254, expected range: 0.5130 0.8980
atms
NPP ATMS RADIANCES CHANNEL 13 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3770, expected range: -0.3213 -0.2658
NPP ATMS RADIANCES CHANNEL 11 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0693, expected range: -0.1811 -0.1339
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3364, expected range: -0.3041 -0.2668
gpsro
COSMIC2-E3 GPSRO SETTING (11 impact heights affected) : out of range
Considerable: obs_number=459.0000, expected range: 604.8649 1177.7234
COSMIC2-E4 GPSRO SETTING (22 impact heights affected) : out of range
Considerable: obs_number=426.0000, expected range: 709.6599 1693.6342
Atmospheric Motion Vector
All METEOSAT-11 AMV IR3 ALL LAYERS Global : all data missing
Severe: obs_number=0, expected range: 395.95 1414.00
METEOSAT-8 AMV IR3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: obs_number=1109.0000, expected range: 616.9907 921.7593
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 410-411 (HPA) : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.7310, expected range: 0.2120 0.4652
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1-2 (HPA) : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-0.0178, expected range: -0.0301 -0.0244