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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-01-02 00:00

amsua
NOAA-19 AMSUA RADIANCES (6 channels affected) : out of range
Severe: stdev_fgdepar=0.3231, expected range: 0.1834 0.2381
METOP-A AMSUA RADIANCES CHANNEL 11 : out of range
3 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.4702, expected range: 0.1931 0.3245
METOP-A AMSUA RADIANCES CHANNEL 10 : out of range
3 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.3025, expected range: 0.1896 0.2504
NOAA-18 AMSUA RADIANCES CHANNEL 13 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.8444, expected range: 0.4260 0.7039
Considerable: avg_fgdepar=0.7442, expected range: -0.6316 0.2806
METOP-A AMSUA RADIANCES CHANNEL 13 : out of range
Considerable: stdev_fgdepar=0.8939, expected range: 0.4623 0.7192
METOP-A AMSUA RADIANCES CHANNEL 9 : out of range
4 times in the last 10 days for at least one item
Considerable: avg_biascorr=0.3538, expected range: -0.2947 0.1286
METOP-B AMSUA RADIANCES CHANNEL 10 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.2694, expected range: 0.1689 0.2326
METOP-B AMSUA RADIANCES CHANNEL 11 : out of range
3 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.3738, expected range: 0.1531 0.2996
METOP-C AMSUA RADIANCES CHANNEL 10 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.2559, expected range: 0.1482 0.2185
AMSUA EARS
NOAA-18 AMSUA RADIANCES CHANNEL 12 : out of range
Considerable: stdev_fgdepar=0.7312, expected range: 0.2605 0.5494
NOAA-18 AMSUA RADIANCES CHANNEL 11 : out of range
Slight: stdev_fgdepar=0.4647, expected range: 0.1675 0.3924
NOAA-18 AMSUA RADIANCES CHANNEL 14 : out of range
Slight: avg_fgdepar=1.3017, expected range: -1.0193 0.5632
iasi
METOP-C IASI RADIANCES CHANNEL 201 : out of range
4 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.0662, expected range: -0.0419 -0.0058
cris
NOAA20 CRIS RADIANCES (30 channels affected) : out of range
Considerable: stdev_fgdepar=0.5912, expected range: 0.0000 0.3840
NOAA20 CRIS RADIANCES CHANNEL 1208 : out of range
Considerable: avg_biascorr=-0.1124, expected range: 0.0284 0.2666
NPP CRIS RADIANCES CHANNEL 665 : out of range
Slight: stdev_fgdepar=0.2167, expected range: 0.1871 0.2103
airs
All AQUA AIRS ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 13674.16 25034.03
mhs
METOP-A MHS ALLSKY RADIANCES CHANNEL 3 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_norm_fgdepar=0.0911, expected range: -0.0244 0.0288
Severely_persistent: stdev_norm_fgdepar=0.5287, expected range: 0.0903 0.1500
METOP-A MHS ALLSKY RADIANCES CHANNEL 4 : out of range
31 times in the last 10 days for at least one item
Severely_persistent: avg_norm_fgdepar=-0.1115, expected range: -0.0426 0.0464
Severely_persistent: stdev_norm_fgdepar=0.4186, expected range: 0.0406 0.1765
mwhs2
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 3 : out of range
2 times in the last 10 days for at least one item
Severe: avg_norm_fgdepar=-0.1804, expected range: -0.0493 0.0664
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 2 : out of range
1 times in the last 10 days for at least one item
Slight: avg_norm_fgdepar=-0.0877, expected range: -0.0499 0.0509
atms
NPP ATMS RADIANCES (5 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.2780, expected range: 0.1758 0.2268
NPP ATMS RADIANCES CHANNEL 15 : out of range
3 times in the last 10 days for at least one item
Severe: avg_fgdepar=2.1843, expected range: -0.7274 0.5433
NOAA20 ATMS RADIANCES CHANNEL 11 : out of range
Severe: stdev_fgdepar=0.2836, expected range: 0.1402 0.1941
NOAA20 ATMS RADIANCES CHANNEL 12 : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.4465, expected range: 0.0811 0.2653
NOAA20 ATMS RADIANCES CHANNEL 15 : out of range
2 times in the last 10 days for at least one item
Severe: avg_fgdepar=2.2750, expected range: -0.6045 0.6031
NPP ATMS RADIANCES CHANNEL 14 : out of range
Considerable: avg_fgdepar=0.6394, expected range: -0.5221 0.1504
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.6226, expected range: 0.1286 0.4183
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
Considerable: avg_fgdepar=0.7170, expected range: -0.5606 0.1834
gpsro
All TERRASAR-X GPSRO SETTING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 195.10 864.77
Atmospheric Motion Vector
METEOSAT-11 AMV CLOUDY WV2 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 : out of range
Considerable: avg_fgdepar=6.0920, expected range: 3.4376 4.8860
METEOSAT-11 AMV IR3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
1 times in the last 10 days for at least one item
Considerable: avg_fgdepar=6.6747, expected range: 2.9995 5.0947
GOES-17 AMV CLOUDY WV3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HP : out of range
Considerable: obs_number=5046.0000, expected range: 1927.4217 3893.5783