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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-01-07 12:00

amsua
NOAA-18 AMSUA RADIANCES CHANNEL 9 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4372, expected range: -0.8346 -0.6841
METOP-A AMSUA RADIANCES CHANNEL 9 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3198, expected range: 0.0586 0.1286
All AQUA AMSUA ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 8565.67 10824.08
METOP-B AMSUA RADIANCES CHANNEL 9 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2723, expected range: 0.0506 0.1527
iasi
METOP-A IASI RADIANCES CHANNEL 201 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0452, expected range: -0.0166 0.0177
METOP-C IASI RADIANCES CHANNEL 195 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1509, expected range: 0.1746 0.1874
METOP-C IASI RADIANCES CHANNEL 201 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0681, expected range: -0.0419 -0.0246
METOP-C IASI RADIANCES CHANNEL 222 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0417, expected range: -0.0274 -0.0206
airs
All AQUA AIRS ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 8760.71 28836.21
mhs
METOP-A MHS ALLSKY RADIANCES CHANNEL 3 : out of range
30 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.3824, expected range: 0.1280 0.1500
METOP-A MHS ALLSKY RADIANCES CHANNEL 4 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.3595, expected range: 0.1252 0.1765
atms
NPP ATMS RADIANCES CHANNEL 10 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0110, expected range: -0.2519 -0.1780
NPP ATMS RADIANCES CHANNEL 11 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0408, expected range: -0.1204 -0.0380
NOAA20 ATMS RADIANCES CHANNEL 9 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4491, expected range: -0.7113 -0.5761
gpsro
All COSMIC-6 GPSRO SETTING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 1297.04
Atmospheric Motion Vector
METEOSAT-8 AMV CLOUDY WV2 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 : out of range
3 times in the last 10 days for at least one item
Considerable: stdev_press=19.5604, expected range: 28.1958 38.7699
GOES-17 AMV CLOUDY WV3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HP : out of range
Considerable: obs_number=939.0000, expected range: 555.2438 767.5062
METEOSAT-11 AMV IR3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Slight: stdev_press=44.4233, expected range: 36.0189 41.3724
amdar
All ADS-C ALL LAYERS North Atlantic : all data missing
Severe: obs_number=0, expected range: 2418.44 6811.44
All ADS-C ALL LAYERS North West Pacific : all data missing
Severe: obs_number=0, expected range: 1400.58 5429.07
All ADS-C ALL LAYERS North East Pacific : all data missing
Severe: obs_number=0, expected range: 1597.43 3321.39
All ADS-C ALL LAYERS South West Pacific : all data missing
Severe: obs_number=0, expected range: 26.40 289.69
All ADS-C ALL LAYERS South Est Pacific : all data missing
Severe: obs_number=0, expected range: 291.92 687.73
All ADS-C ALL LAYERS Indian Ocean : all data missing
Severe: obs_number=0, expected range: 367.29 1027.54
All ADS-C ALL LAYERS Global : all data missing
Severe: obs_number=0, expected range: 8562.70 16138.59
All ADS-C ALL LAYERS Tropics : all data missing
Severe: obs_number=0, expected range: 1255.69 2714.54
All ADS-C ALL LAYERS Alantic Tropical are : all data missing
Severe: obs_number=0, expected range: 0.00 943.11
All ADS-C ALL LAYERS West pacific Tropica : all data missing
Severe: obs_number=0, expected range: 54.02 788.86
All ADS-C ALL LAYERS East pacific Tropica : all data missing
Severe: obs_number=0, expected range: 232.85 1492.56
All ADS-C ALL LAYERS Indian Ocean Tropica : all data missing
Severe: obs_number=0, expected range: 227.84 531.22
All ADS-C ALL LAYERS North pole : all data missing
Severe: obs_number=0, expected range: 38.03 784.88