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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2019-11-12 12:00

iasi
METOP-B/IASI RADIANCES CHANNEL 5988 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.5572, expected range: 0.1740 0.3856
METOP-B/IASI RADIANCES CHANNEL 5992 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6043, expected range: 0.1831 0.3781
METOP-B/IASI RADIANCES CHANNEL 5994 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6475, expected range: 0.1853 0.3970
All METOP-A/IASI RADIANCES ALL CHANNELS Missing
airs
AQUA/AIRS RADIANCES CHANNEL 76 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.9336, expected range: 0.3882 0.7409
AQUA/AIRS RADIANCES CHANNEL 77 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.8426, expected range: 0.4314 0.6326
AQUA/AIRS RADIANCES CHANNEL 78 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.7474, expected range: 0.4733 0.5856
AQUA/AIRS RADIANCES CHANNEL 79 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6776, expected range: 0.5320 0.6044
AQUA/AIRS RADIANCES CHANNEL 2084 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6927, expected range: 0.1242 0.4711
AQUA/AIRS RADIANCES CHANNEL 2085 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.7704, expected range: 0.1998 0.5602
AQUA/AIRS RADIANCES (15 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.2118, expected range: 0.0233 0.2764
mwhs2
ALLSKY FY-3C/MWHS2 RADIANCES CHANNEL 1 : out of range
Slight: obs_number=20490.0000, expected range: 22035.4274 35912.3504
ALLSKY FY-3C/MWHS2 RADIANCES CHANNEL 14 : out of range
Slight: obs_number=20339.0000, expected range: 21801.6424 35586.4687
ALLSKY FY-3C/MWHS2 RADIANCES CHANNEL 15 : out of range
Slight: obs_number=20273.0000, expected range: 21720.5332 35526.2445
Atmospheric Motion Vector
GOES-16/AMV VIS1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
Considerable: obs_number=14955.0000, expected range: 16986.7659 23005.6552
GOES-16/AMV CLOUDY WV3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 ( : out of range
2 times in the last 10 days for at least one item
Slight: avg_fgdepar=4.2145, expected range: 2.2462 4.0117
Radiosondes
HIGH RESO SEA TEMP Q (G/KG) PRESSURE LAYER 0-300 (HPA) : out of range
3 times in the last 10 days for at least one item
Slight: rms_fgdepar=0.0234, expected range: 0.0000 0.0190