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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-01-16 12:00

amsua
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 10 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1503, expected range: 0.0510 0.0944
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2450, expected range: 0.2707 0.3028
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2944, expected range: -0.2526 -0.2354
cris
NOAA20 CRIS RADIANCES CHANNEL 1173 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1529, expected range: -0.1214 -0.0873
NOAA20 CRIS RADIANCES CHANNEL 1174 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0518, expected range: -0.0197 0.0177
NOAA20 CRIS RADIANCES CHANNEL 1185 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1239, expected range: 0.1572 0.1915
NOAA20 CRIS RADIANCES CHANNEL 1221 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1728, expected range: 0.2039 0.2355
NOAA20 CRIS RADIANCES CHANNEL 1234 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0193, expected range: 0.0108 0.0461
NOAA20 CRIS RADIANCES CHANNEL 1237 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0855, expected range: 0.1219 0.1643
NOAA20 CRIS RADIANCES CHANNEL 1238 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0219, expected range: 0.0607 0.0969
NOAA20 CRIS RADIANCES CHANNEL 1267 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1698, expected range: 0.2075 0.2345
NOAA20 CRIS RADIANCES CHANNEL 1268 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1214, expected range: 0.1563 0.1828
NOAA20 CRIS RADIANCES CHANNEL 1298 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0369, expected range: -0.0063 0.0288
mhs
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=5528.0000, expected range: 6595.8093 6689.8769
mwhs2
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 2 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=1.0172, expected range: 0.7711 0.8737
Severely_persistent: avg_biascorr=-2.8188, expected range: -1.8246 -1.1961
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 4 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.8988, expected range: 0.6253 0.7109
Severely_persistent: avg_biascorr=-3.4955, expected range: -2.7281 -2.1322
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 5 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=1.0565, expected range: 0.6268 0.7519
Severely_persistent: avg_biascorr=-2.0256, expected range: -0.4450 0.1240
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 6 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=1.0732, expected range: 0.5700 0.8143
Severely_persistent: avg_biascorr=-0.2360, expected range: 1.5698 2.2306
atms
NPP ATMS RADIANCES CHANNEL 10 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2348, expected range: -0.2865 -0.2579
NPP ATMS RADIANCES CHANNEL 11 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1224, expected range: -0.2218 -0.2025
NOAA20 ATMS RADIANCES CHANNEL 10 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3506, expected range: -0.4308 -0.3931
Atmospheric Motion Vector
HIMAWARI-8 AMV IR1 WIND VECTOR DIFF (M/S) (2 pressure layers affected) : out of range
2 times in the last 10 days for at least one item
Severe: obs_number=212.0000, expected range: 1210.0967 1261.6242