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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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.
Early delivery 4D-VAR at 2022-07-01 18:00
| amsua | ||
| METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
19 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.0926, expected range: 0.1409 0.1957 |
 | |
| iasi | ||
| METOP-B IASI RADIANCES CHANNEL 163 : out of range
20 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.2378, expected range: 0.2605 0.2810 |
 | |
| METOP-B IASI RADIANCES CHANNEL 170 : out of range
21 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1757, expected range: 0.2070 0.2332 |
 | |
| METOP-C IASI RADIANCES CHANNEL 144 : out of range
17 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1594, expected range: 0.1907 0.2310 |
 | |
| METOP-C IASI RADIANCES CHANNEL 163 : out of range
17 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.2177, expected range: 0.2374 0.2619 |
 | |
| METOP-B IASI RADIANCES (13 channels affected) : out of range
Severe: obs_number=322.0000, expected range: 0.0000 104.1757 |
 | |
| METOP-C IASI RADIANCES CHANNEL 301 : out of range
Slight: stdev_fgdepar=0.2856, expected range: 0.2502 0.2851 |
 | |
| gpsro | ||
| All COSMIC2-E5 GPSRO RISING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 461.66 1591.35 |
||
| scatt | ||
| All HY-2B SCATTEROMETER Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 121019.00 |
||
| resat | ||
| AURA OMI OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
39 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-2.2491, expected range: -1.9682 -1.8849 |
 | |
| NOAA-19 SBUV OZONE, TOP (21 pressure layers affected) : out of range
36 times in the last 10 days for at least one item Severely_persistent: obs_number=105.0000, expected range: 52.6567 68.2921 |
 | |
| NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1010-1011 (HPA) : out of range
37 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=2.5956, expected range: 1.4458 1.9796 |
 | |
| NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 10-11 (HPA) : out of range
38 times in the last 10 days for at least one item Severely_persistent: avg_fgdepar=-0.0383, expected range: -0.0469 -0.0433 |
 | |
| NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 100-101 (HPA) : out of range
39 times in the last 10 days for at least one item Severely_persistent: avg_fgdepar=0.2233, expected range: 0.1311 0.1512 |
 | |
| NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 640-641 (HPA) : out of range
39 times in the last 10 days for at least one item Severely_persistent: avg_fgdepar=-3.5179, expected range: -2.4521 -2.3171 |
 | |
| NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 40-41 (HPA) : out of range
36 times in the last 10 days for at least one item Severely_persistent: avg_fgdepar=-0.0232, expected range: -0.0002 0.0128 |
 | |