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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-01-15 00:00

amsua
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 10 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1519, expected range: 0.0578 0.0944
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2401, expected range: 0.2707 0.3064
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7020, expected range: 0.5313 0.6243
Severely_persistent: avg_biascorr=-0.2838, expected range: -0.2526 -0.2275
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
Severe: stdev_norm_fgdepar=0.6698, expected range: 0.5548 0.6132
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
Severe: stdev_norm_fgdepar=0.6676, expected range: 0.5552 0.6022
iasi
METOP-B IASI RADIANCES (14 channels affected) : out of range
Severe: stdev_fgdepar=0.3450, expected range: 0.2815 0.3100
METOP-C IASI RADIANCES (21 channels affected) : out of range
Severe: stdev_fgdepar=0.4637, expected range: 0.3639 0.4139
METOP-C IASI RADIANCES CHANNEL 131 : out of range
Slight: stdev_fgdepar=0.2947, expected range: 0.2440 0.2945
cris
NOAA20 CRIS RADIANCES (11 channels affected) : out of range
1 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.1363, expected range: -0.1214 -0.0916
NOAA20 CRIS RADIANCES CHANNEL 70 : out of range
Considerable: obs_number=1998.0000, expected range: 2140.0425 2356.5825
NOAA20 CRIS RADIANCES CHANNEL 72 : out of range
Considerable: obs_number=1882.0000, expected range: 2059.3530 2399.1470
NOAA20 CRIS RADIANCES CHANNEL 74 : out of range
Considerable: obs_number=1918.0000, expected range: 2057.9755 2404.6495
NOAA20 CRIS RADIANCES CHANNEL 75 : out of range
Considerable: obs_number=1857.0000, expected range: 2013.8544 2409.7706
NOAA20 CRIS RADIANCES CHANNEL 76 : out of range
Considerable: obs_number=1922.0000, expected range: 2069.0748 2403.0502
NOAA20 CRIS RADIANCES CHANNEL 77 : out of range
Considerable: obs_number=1836.0000, expected range: 1966.9916 2412.8834
NOAA20 CRIS RADIANCES CHANNEL 78 : out of range
Considerable: obs_number=1855.0000, expected range: 2002.7096 2409.1654
mhs
NOAA-19 MHS ALLSKY RADIANCES CHANNEL 1 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.1349, expected range: 0.1182 0.1263
METOP-B MHS ALLSKY RADIANCES CHANNEL 5 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: obs_number=5791.0000, expected range: 6595.8093 6696.2931
mwhs2
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 5 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_norm_fgdepar=1.0847, expected range: -0.4232 0.4175
Severely_persistent: stdev_norm_fgdepar=1.0134, expected range: 0.6268 0.7519
Severely_persistent: avg_biascorr=-0.5120, expected range: -0.1206 0.1663
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 4 : out of range
4 times in the last 10 days for at least one item
Severe: avg_norm_fgdepar=0.6088, expected range: -0.1862 0.1625
Severe: stdev_norm_fgdepar=0.8045, expected range: 0.6253 0.7109
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 6 : out of range
4 times in the last 10 days for at least one item
Severe: avg_norm_fgdepar=1.1306, expected range: -0.3295 0.3362
Severe: stdev_norm_fgdepar=1.0831, expected range: 0.5700 0.8143
Considerable: avg_biascorr=1.2268, expected range: 1.5698 2.2306
atms
NPP ATMS RADIANCES CHANNEL 11 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1415, expected range: -0.2293 -0.2025
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
10 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.3168, expected range: 0.2730 0.3165
Atmospheric Motion Vector
GOES-16 AMV VIS1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
Considerable: obs_number=539.0000, expected range: 1433.2557 2903.0777
Geostationary CSR
GOES-16 ABI RADIANCES CHANNEL 2 : out of range
Considerable: obs_number=8223.0000, expected range: 11370.9538 22038.6462
GOES-16 ABI RADIANCES CHANNEL 3 : out of range
Considerable: obs_number=8219.0000, expected range: 11385.1780 22026.0220
GOES-16 ABI RADIANCES CHANNEL 4 : out of range
Considerable: obs_number=8235.0000, expected range: 11428.6133 22014.7867