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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2020-06-04 00:00

amsua
METOP-B AMSUA RADIANCES CHANNEL 9 : out of range
4 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.0722, expected range: -0.0598 -0.0404
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=-0.1113, expected range: -0.0991 -0.0904
METOP-A IASI RADIANCES CHANNEL 566 : out of range
Severe: stdev_fgdepar=0.4722, expected range: 0.3121 0.3894
METOP-A IASI RADIANCES CHANNEL 571 : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.4763, expected range: 0.3189 0.3749
METOP-A IASI RADIANCES CHANNEL 573 : out of range
Severe: stdev_fgdepar=0.4608, expected range: 0.3092 0.3817
cris
NPP CRIS RADIANCES CHANNEL 33 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0777, expected range: 0.0917 0.0967
NPP CRIS RADIANCES CHANNEL 39 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2624, expected range: 0.2989 0.3162
NPP CRIS RADIANCES CHANNEL 54 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2267, expected range: 0.2742 0.2799
NPP CRIS RADIANCES CHANNEL 66 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1408, expected range: 0.1627 0.1713
NOAA20 CRIS RADIANCES CHANNEL 68 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1025, expected range: 0.1605 0.2164
NOAA20 CRIS RADIANCES CHANNEL 60 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1230, expected range: 0.1811 0.2261
mwhs
All FY-3B MWHS ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 13353.98 21638.32
atms
NPP ATMS RADIANCES (7 channels affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=2815.0000, expected range: 2972.2665 3438.4835
gpsro
All FY-3C GNOS RISING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 467.59 2312.99
Atmospheric Motion Vector
GOES-17 AMV VIS1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=234.0000, expected range: 1692.9429 3110.0363
METEOSAT-8 AMV IR3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA : out of range
Slight: stdev_press=21.8170, expected range: 23.6221 30.7258
Geostationary CSR
GOES-16 ABI RADIANCES CHANNEL 2 : out of range
Considerable: obs_number=11775.0000, expected range: 15345.4792 27476.3958
GOES-16 ABI RADIANCES CHANNEL 3 : out of range
Considerable: obs_number=11782.0000, expected range: 15339.3771 27464.4979
GOES-16 ABI RADIANCES CHANNEL 4 : out of range
Considerable: obs_number=11886.0000, expected range: 15354.8974 27507.9776
Radiosondes
All HIGH RESO LAND TEMP ALL LAYERS WMO BLOCK 88 : all data missing
Severe: obs_number=0, expected range: 121.69 166.56
All HIGH RESO LAND TEMP ALL LAYERS South Atlantic : all data missing
Severe: obs_number=0, expected range: 117.69 172.06
HIGH RESO SEA TEMP Q (G/KG) PRESSURE LAYER 0-300 (HPA) : missing
Severe: obs_number=0.0000, expected range: 68.0448 405.6916
All HIGH RESO SEA TEMP ALL LAYERS North pole : all data missing
Severe: obs_number=0, expected range: 214.34 398.66
LAND TEMP Q (G/KG) (2 pressure layers affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=73.0000, expected range: 165.1735 301.0765
LAND TEMP WIND VECTOR DIFF (M/S) (3 pressure layers affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=192.0000, expected range: 419.4908 771.2592
HIGH RESO LAND TEMP TEMPERATURE (K) PRESSURE LAYER 300-600 (HPA) : out of range
Considerable: obs_number=307.0000, expected range: 359.0226 426.7274
Considerable: obs_number=353.0000, expected range: 405.0295 487.2205
HIGH RESO LAND TEMP TEMPERATURE (K) (4 pressure layers affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=152.0000, expected range: 293.1775 329.8225
HIGH RESO LAND TEMP TEMPERATURE (K) (2 pressure layers affected) : out of range
Considerable: obs_number=165.0000, expected range: 235.5013 308.7209
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=139.0000, expected range: 219.3904 307.8596
pilot
LAND PILOT WIND VECTOR DIFF (M/S) (4 pressure layers affected) : out of range
Considerable: obs_number=90.0000, expected range: 245.2617 337.9883
LAND PILOT WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: obs_number=71.0000, expected range: 196.0814 405.6686
synop
AUTOMATIC LAND SYNOP SURFACE PRESSURE (PA) : out of range
Severe: rms_fgdepar=198.7216, expected range: 37.4398 116.2231
ship
BUFR SHIP SYNOP SURFACE PRESSURE (PA) : out of range
Considerable: obs_number=371.0000, expected range: 437.3116 503.3134