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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-12-06 12:00

amsua
NOAA-19 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7431, expected range: 0.5560 0.6605
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7508, expected range: 0.5443 0.6483
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7312, expected range: 0.5236 0.6298
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 5 : out of range
Slight: obs_number=6110.0000, expected range: 10045.0591 20336.7056
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 7 : out of range
Slight: obs_number=8238.0000, expected range: 12554.0144 29479.7503
AMSUA Pacific RARS
All NOAA-18 AMSUA ALL SKY CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 641.76 889.24
All NOAA-19 AMSUA ALL SKY CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 206.72 1544.85
iasi
METOP-B IASI RADIANCES (220 channels affected) : out of range
Severe: obs_number=9622.0000, expected range: 22913.3598 23080.5225
METOP-B IASI RADIANCES CHANNEL 51 : out of range
Slight: avg_fgdepar=-0.0237, expected range: -0.0137 0.0171
METOP-B IASI RADIANCES CHANNEL 133 : out of range
Slight: avg_fgdepar=-0.0224, expected range: -0.0108 0.0200
METOP-B IASI RADIANCES CHANNEL 165 : out of range
Slight: avg_fgdepar=-0.0127, expected range: -0.0057 0.0146
airs
AQUA AIRS RADIANCES CHANNEL 72 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.5532, expected range: -0.7636 -0.7441
AQUA AIRS RADIANCES CHANNEL 93 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.1279, expected range: 0.0065 0.0511
AQUA AIRS RADIANCES CHANNEL 150 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.1507, expected range: -0.1022 0.0357
AQUA AIRS RADIANCES CHANNEL 156 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.0599, expected range: -0.2735 -0.1661
AQUA AIRS RADIANCES CHANNEL 162 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.2727, expected range: -0.4568 -0.4146
AQUA AIRS RADIANCES CHANNEL 169 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.2055, expected range: -0.3808 -0.3686
AQUA AIRS RADIANCES CHANNEL 175 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.2531, expected range: -0.4113 -0.3216
AQUA AIRS RADIANCES CHANNEL 250 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.5033, expected range: -0.7543 -0.6670
mhs
METOP-B MHS ALLSKY RADIANCES CHANNEL 3 : out of range
Severe: obs_number=20832.0000, expected range: 46256.2814 48505.1304
METOP-B MHS ALLSKY RADIANCES CHANNEL 4 : out of range
Severe: obs_number=19564.0000, expected range: 43103.6458 45797.6483
METOP-B MHS ALLSKY RADIANCES CHANNEL 5 : out of range
Severe: obs_number=11450.0000, expected range: 25816.1269 28675.4025
atms
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3212, expected range: -0.2487 -0.1723
NOAA20 ATMS RADIANCES CHANNEL 10 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5538, expected range: -0.6960 -0.6423
gpsro
METOP-B GRAS RISING (24 impact heights affected) : out of range
Considerable: obs_number=503.0000, expected range: 1119.4383 1621.3852
Atmospheric Motion Vector
DUAL-METOP AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : out of range
Slight: obs_number=1313.0000, expected range: 2642.9803 4839.7697
scatt
METOP-B ASCAT WIND VECTOR DIFF (M/S) : out of range
Severe: obs_number=14258.0000, expected range: 30617.5187 37883.8931