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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-06-11 12:00

amsua
METOP-B AMSUA RADIANCES CHANNEL 14 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.1058, expected range: 0.9082 1.0048
METOP-A AMSUA RADIANCES (8 channels affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=10595.0000, expected range: 13316.2590 19928.6821
iasi
METOP-A IASI RADIANCES CHANNEL 312 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.2371, expected range: -0.2146 -0.1899
METOP-B IASI RADIANCES CHANNEL 1574 : out of range
1 times in the last 10 days for at least one item
Severe: avg_fgdepar=-0.1787, expected range: -0.0455 0.1125
METOP-C IASI RADIANCES CHANNEL 312 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.2543, expected range: -0.2348 -0.2162
METOP-A IASI RADIANCES CHANNEL 1574 : out of range
Considerable: avg_fgdepar=-0.2101, expected range: -0.0831 0.1177
METOP-A IASI RADIANCES CHANNEL 1585 : out of range
1 times in the last 10 days for at least one item
Considerable: avg_fgdepar=-0.1443, expected range: -0.0510 0.0983
METOP-B IASI RADIANCES CHANNEL 312 : out of range
1 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.2206, expected range: -0.2034 -0.1726
METOP-B IASI RADIANCES CHANNEL 1578 : out of range
1 times in the last 10 days for at least one item
Considerable: avg_fgdepar=-0.1299, expected range: -0.0552 0.0876
METOP-B IASI RADIANCES CHANNEL 1585 : out of range
1 times in the last 10 days for at least one item
Considerable: avg_fgdepar=-0.1155, expected range: -0.0367 0.0988
METOP-A IASI RADIANCES CHANNEL 1536 : out of range
Slight: avg_fgdepar=-0.0475, expected range: -0.0103 0.1247
METOP-A IASI RADIANCES CHANNEL 1578 : out of range
2 times in the last 10 days for at least one item
Slight: avg_fgdepar=-0.1568, expected range: -0.0890 0.1052
METOP-A IASI RADIANCES CHANNEL 1579 : out of range
2 times in the last 10 days for at least one item
Slight: avg_fgdepar=-0.1664, expected range: -0.0922 0.0855
METOP-A IASI RADIANCES CHANNEL 1587 : out of range
2 times in the last 10 days for at least one item
Slight: avg_fgdepar=-0.1241, expected range: -0.0604 0.1142
METOP-B IASI RADIANCES CHANNEL 1509 : out of range
Slight: avg_fgdepar=-0.0336, expected range: 0.0136 0.1405
METOP-B IASI RADIANCES CHANNEL 1513 : out of range
Slight: avg_fgdepar=-0.0485, expected range: -0.0042 0.1426
METOP-B IASI RADIANCES CHANNEL 1521 : out of range
Slight: avg_fgdepar=-0.0408, expected range: 0.0051 0.1311
METOP-B IASI RADIANCES CHANNEL 1579 : out of range
1 times in the last 10 days for at least one item
Slight: avg_fgdepar=-0.1349, expected range: -0.0700 0.0738
METOP-B IASI RADIANCES CHANNEL 1587 : out of range
1 times in the last 10 days for at least one item
Slight: avg_fgdepar=-0.1024, expected range: -0.0445 0.1138
METOP-B IASI RADIANCES CHANNEL 1579 : out of range
1 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.5114, expected range: 0.4286 0.4888
METOP-C IASI RADIANCES (17 channels affected) : out of range
Slight: avg_fgdepar=-0.0033, expected range: 0.0084 0.0477
METOP-C IASI RADIANCES CHANNEL 1585 : out of range
3 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.4881, expected range: 0.4133 0.4722
METOP-C IASI RADIANCES CHANNEL 1587 : out of range
3 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.4622, expected range: 0.4000 0.4497
airs
AQUA AIRS RADIANCES CHANNEL 672 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1350, expected range: -0.1201 -0.1165
AQUA AIRS RADIANCES CHANNEL 1088 : out of range
1 times in the last 10 days for at least one item
Severe: avg_fgdepar=-0.6235, expected range: -0.4934 -0.3305
AQUA AIRS RADIANCES CHANNEL 1088 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.4814, expected range: 0.3195 0.4240
AQUA AIRS RADIANCES CHANNEL 1079 : out of range
Slight: avg_fgdepar=-0.1697, expected range: -0.1045 0.0814
AQUA AIRS RADIANCES CHANNEL 1082 : out of range
Slight: avg_fgdepar=-0.1714, expected range: -0.0978 0.0701
AQUA AIRS RADIANCES CHANNEL 1083 : out of range
Slight: avg_fgdepar=-0.1731, expected range: -0.1178 0.0882
AQUA AIRS RADIANCES CHANNEL 1090 : out of range
Slight: avg_fgdepar=-0.1651, expected range: -0.1090 0.0682
AQUA AIRS RADIANCES CHANNEL 1083 : out of range
Slight: stdev_fgdepar=0.4633, expected range: 0.2966 0.4182
gpsro
METOP-A GRAS SETTING HEIGHT 24-26 KM : out of range
Slight: avg_norm_fgdepar=-0.2438, expected range: -0.1926 0.0005
amdar
AMDAR WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Severe: rms_fgdepar=10.3018, expected range: 1.9362 5.6415