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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

amsua
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2007, expected range: 0.2350 0.2511
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
27 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3394, expected range: -0.2883 -0.2837
mwhs2
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 4 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-1.6440, expected range: -3.6657 -2.8594
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 2 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=1.2407, expected range: 0.7575 0.8872
Severely_persistent: avg_biascorr=-4.1319, expected range: -1.9393 -1.0851
Severely_persistent: avg_biascorr=-3.7793, expected range: -2.4612 -1.0930
Slight: avg_norm_fgdepar=-0.4113, expected range: -0.2450 0.2415
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 4 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.8186, expected range: 0.6111 0.7192
Severely_persistent: avg_biascorr=-3.4108, expected range: -2.7387 -2.1202
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 5 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-1.9191, expected range: -0.4184 0.1275
Severely_persistent: stdev_norm_fgdepar=0.9064, expected range: 0.5952 0.7524
Severely_persistent: stdev_norm_fgdepar=0.8090, expected range: 0.6217 0.7234
Slight: stdev_norm_fgdepar=0.8536, expected range: 0.5990 0.7721
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 6 : out of range
31 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1743, expected range: 1.6101 2.2290
atms
NPP ATMS RADIANCES CHANNEL 11 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0923, expected range: -0.1819 -0.1339
Atmospheric Motion Vector
All METEOSAT-11 AMV IR3 ALL LAYERS Global : all data missing
Severe: obs_number=0, expected range: 441.91 1311.29
METEOSAT-8 AMV VIS2 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HP : out of range
Considerable: stdev_fgdepar=1.4386, expected range: 0.8822 1.1487
GOES-16 AMV CLOUDY WV3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HP : out of range
Slight: avg_fgdepar=3.9014, expected range: 3.3815 3.7157
Geostationary CSR
All METEOSAT-11 SEVIRI ALL CHANNELS Global : all data missing
Severe: obs_number=0, expected range: 16493.92 25257.98
METEOSAT-8 SEVIRI RADIANCES CHANNEL 2 : out of range
4 times in the last 10 days for at least one item
Considerable: obs_number=28788.0000, expected range: 15525.9577 21689.5575
METEOSAT-8 SEVIRI RADIANCES CHANNEL 3 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=16967.0000, expected range: 7000.2871 14507.1133
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1-2 (HPA) : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-0.0178, expected range: -0.0300 -0.0244
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 410-411 (HPA) : out of range
Severe: stdev_fgdepar=1.1306, expected range: 0.4738 0.7960
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 640-641 (HPA) : out of range
Severe: stdev_fgdepar=2.0570, expected range: 0.4487 1.0770
Slight: avg_fgdepar=-0.7230, expected range: -0.5359 0.0349
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1010-1011 (HPA) : out of range
Severe: stdev_fgdepar=3.1835, expected range: 0.6639 1.6984