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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-05-21 00:00

amsua
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 7 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5517, expected range: -0.4980 -0.4631
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 7 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5327, expected range: -0.4799 -0.4739
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 8 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2438, expected range: -0.1685 -0.1677
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.7231, expected range: -0.5816 -0.4667
iasi
METOP-C IASI RADIANCES CHANNEL 87 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1077, expected range: 0.1522 0.2060
METOP-C IASI RADIANCES CHANNEL 262 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0455, expected range: 0.0339 0.0401
airs
AQUA AIRS RADIANCES CHANNEL 1104 : out of range
4 times in the last 10 days for at least one item
Severe: avg_biascorr=0.4330, expected range: 0.4737 0.5064
mhs
METOP-B MHS ALLSKY RADIANCES CHANNEL 4 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1728, expected range: 0.0881 0.0966
METOP-B MHS ALLSKY RADIANCES CHANNEL 5 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0724, expected range: 0.0220 0.0420
METOP-C MHS ALLSKY RADIANCES CHANNEL 5 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1915, expected range: 0.1315 0.1393
atms
NPP ATMS RADIANCES CHANNEL 19 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0340, expected range: -0.1181 -0.0787
NPP ATMS RADIANCES CHANNEL 20 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1653, expected range: 0.0741 0.1000
NPP ATMS RADIANCES CHANNEL 21 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3563, expected range: 0.2674 0.2901
NPP ATMS RADIANCES CHANNEL 22 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.9147, expected range: 0.8037 0.8553
NPP ATMS RADIANCES CHANNEL 12 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3833, expected range: -0.3174 -0.2697
NOAA20 ATMS RADIANCES CHANNEL 19 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2804, expected range: -0.3783 -0.3262
NOAA20 ATMS RADIANCES CHANNEL 20 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1129, expected range: -0.1981 -0.1689
NOAA20 ATMS RADIANCES CHANNEL 21 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1083, expected range: 0.0369 0.0522
NOAA20 ATMS RADIANCES CHANNEL 22 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.7155, expected range: 0.6017 0.6550
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1219, expected range: -0.1689 -0.1637
Severely_persistent: avg_biascorr=-0.1771, expected range: -0.2269 -0.2109