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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2020-06-03 00:00

iasi
METOP-B IASI RADIANCES CHANNEL 217 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1074, expected range: -0.0991 -0.0902
cris
NPP CRIS RADIANCES CHANNEL 33 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0768, expected range: 0.0917 0.0945
NPP CRIS RADIANCES CHANNEL 39 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2640, expected range: 0.2989 0.3209
NPP CRIS RADIANCES CHANNEL 54 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2317, expected range: 0.2742 0.2867
NPP CRIS RADIANCES CHANNEL 60 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1928, expected range: 0.2239 0.2311
NPP CRIS RADIANCES CHANNEL 66 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1433, expected range: 0.1627 0.1830
NOAA20 CRIS RADIANCES CHANNEL 60 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1357, expected range: 0.1811 0.2345
NOAA20 CRIS RADIANCES CHANNEL 88 : out of range
Considerable: obs_number=1603.0000, expected range: 803.2273 1425.5227
saphir
All MEGHA-TROPIQUES SAPHIR ALLSKY ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 24986.53
mwhs
All FY-3B MWHS ALL CHANNELS Global : all data missing
Severe: obs_number=0, expected range: 3711.08 30092.68
gpsro
All FY-3C GNOS RISING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 467.59 2312.99
SPIRE LEMUR 3U GPSRO RISING HEIGHT 3 : out of range
Considerable: stdev_norm_fgdepar=0.3575, expected range: 0.1031 0.2585
COSMIC2-E3 GPSRO RISING HEIGHT 4 : out of range
1 times in the last 10 days for at least one item
Slight: stdev_norm_fgdepar=0.9153, expected range: 0.9670 1.1475
Atmospheric Motion Vector
NPP VIIRS AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Severe: avg_fgdepar=6.0891, expected range: 4.4418 5.3805
METEOSAT-8 AMV VIS2 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HP : out of range
Considerable: stdev_fgdepar=1.0962, expected range: 0.9135 1.0347
NOAA20 VIIRS-AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
6 times in the last 10 days for at least one item
Slight: stdev_fgdepar=3.2364, expected range: 1.8571 2.8524
Radiosondes
HIGH RESO LAND TEMP Q (G/KG) (3 pressure layers affected) : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=264.0000, expected range: 191.4535 204.5465
All HIGH RESO LAND TEMP ALL LAYERS WMO BLOCK 61 : all data missing
Severe: obs_number=0, expected range: 49.78 724.56
HIGH RESO SEA TEMP Q (G/KG) (4 pressure layers affected) : out of range
2 times in the last 10 days for at least one item
Severe: obs_number=204.0000, expected range: 129.7978 136.8689
LAND TEMP TEMPERATURE (K) PRESSURE LAYER 0-300 (HPA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=58.0000, expected range: 162.5999 253.9001
LAND TEMP WIND VECTOR DIFF (M/S) (3 pressure layers affected) : out of range
Considerable: obs_number=180.0000, expected range: 408.8661 792.8839
LAND TEMP Q (G/KG) (2 pressure layers affected) : out of range
Considerable: obs_number=80.0000, expected range: 169.9762 308.0238
HIGH RESO LAND TEMP WIND VECTOR DIFF (M/S) (4 pressure layers affected : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=149.0000, expected range: 229.4863 294.5137
HIGH RESO LAND TEMP Q (G/KG) PRESSURE LAYER 0-300 (HPA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=56.0000, expected range: 63.1667 68.1667
prof
EUROPEAN WIND PROFILER VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range
Considerable: obs_number=3876.0000, expected range: 1052.8866 2426.8634
pilot
LAND PILOT WIND VECTOR DIFF (M/S) (3 pressure layers affected) : out of range
Considerable: obs_number=89.0000, expected range: 247.5179 334.9821
LAND PILOT WIND VECTOR DIFF (M/S) (4 pressure layers affected) : out of range
Considerable: obs_number=93.0000, expected range: 205.2688 399.2312
buoy
MOORED BUOYS SURFACE PRESSURE (PA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=69.0000, expected range: 31.1535 52.8465