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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-12-02 18:00

amsua
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 10 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=1.0196, expected range: 0.7290 0.8920
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6344, expected range: 0.5587 0.5858
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 9 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0043, expected range: 0.0028 0.0036
iasi
METOP-B IASI RADIANCES CHANNEL 72 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2508, expected range: 0.2792 0.3028
METOP-B IASI RADIANCES (35 channels affected) : out of range
Severe: avg_biascorr=-0.0165, expected range: -0.0958 -0.0764
METOP-C IASI RADIANCES (33 channels affected) : out of range
Severe: avg_biascorr=-0.0783, expected range: -0.1646 -0.1480
cris
NOAA20 CRIS RADIANCES CHANNEL 665 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1113, expected range: 0.0026 0.0053
NOAA20 CRIS RADIANCES CHANNEL 598 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0229, expected range: -0.1921 -0.1228
NOAA20 CRIS RADIANCES CHANNEL 602 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0617, expected range: -0.2164 -0.1508
NOAA20 CRIS RADIANCES CHANNEL 618 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0378, expected range: -0.1226 -0.0864
NOAA20 CRIS RADIANCES CHANNEL 409 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0050, expected range: -0.2144 -0.2016
NOAA20 CRIS RADIANCES CHANNEL 124 : out of range
30 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0912, expected range: -0.0686 -0.0405
NOAA20 CRIS RADIANCES CHANNEL 123 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0550, expected range: -0.0291 0.0000
NOAA20 CRIS RADIANCES CHANNEL 121 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0178, expected range: 0.0432 0.0708
NOAA20 CRIS RADIANCES CHANNEL 929 : out of range
31 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3736, expected range: 0.2968 0.3258
NOAA20 CRIS RADIANCES CHANNEL 963 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0342, expected range: -0.0857 -0.0713
NOAA20 CRIS RADIANCES CHANNEL 912 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2193, expected range: 0.1616 0.1746
NOAA20 CRIS RADIANCES CHANNEL 657 : out of range
30 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1056, expected range: 0.0525 0.0820
NOAA20 CRIS RADIANCES (27 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.1318, expected range: -0.1198 -0.1155
NOAA20 CRIS RADIANCES CHANNEL 60 : out of range
Considerable: stdev_fgdepar=0.1072, expected range: 0.0775 0.0969
airs
AQUA AIRS RADIANCES CHANNEL 1868 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3887, expected range: 0.3130 0.3525
mwhs2
All FY-3C MWHS2 ALLSKY ALL CHANNELS Global : all data missing
Severe: obs_number=0, expected range: 0.00 26699.67
atms
NPP ATMS RADIANCES CHANNEL 14 : out of range
69 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0031, expected range: -0.0929 -0.0619
Severely_persistent: avg_biascorr=-0.1519, expected range: -0.0922 -0.0133
Severely_persistent: stdev_fgdepar=0.5292, expected range: 0.3573 0.4503
Severely_persistent: stdev_fgdepar=0.5105, expected range: 0.4149 0.4509
NPP ATMS RADIANCES (5 channels affected) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3294, expected range: -0.0884 -0.0805
NOAA20 ATMS RADIANCES CHANNEL 11 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3380, expected range: -0.4353 -0.4295
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5440, expected range: -0.3951 -0.3813
Severely_persistent: avg_biascorr=-0.3695, expected range: -0.3045 -0.2714
Severely_persistent: stdev_fgdepar=0.4611, expected range: 0.3704 0.4014
Severely_persistent: stdev_fgdepar=0.4965, expected range: 0.3158 0.3956
NOAA20 ATMS RADIANCES CHANNEL 15 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.8282, expected range: 0.5032 0.6565
ssmis
DMSP-17 SSMIS RADIANCES CHANNEL 5 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0051, expected range: 0.0028 0.0040
DMSP-17 SSMIS RADIANCES (9 channels affected) : out of range
Considerable: obs_number=1827.0000, expected range: 3161.0318 5278.5237
gpsro
All COSMIC2-E1 GPSRO RISING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 167.93 1932.94
COSMIC2-E3 GPSRO RISING (6 impact heights affected) : out of range
Considerable: obs_number=565.0000, expected range: 853.1974 1991.5248
Atmospheric Motion Vector
METEOSAT-8 AMV CLOUDY WV2 WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-60 : out of range
Severe: avg_fgdepar=4.4744, expected range: 3.6465 3.9923
METOP-C AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=327.0000, expected range: 194.0210 231.9912
NOAA20 VIIRS-AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA : out of range
Considerable: stdev_fgdepar=2.5504, expected range: 1.8821 2.2585
Geostationary CSR
All GOES-16 ABI ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 29885.18 41322.74
All GOES-17 GEOS RADIANCES ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 10554.87 75774.34
scatt
All HY-2B SCATTEROMETER Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 140516.52
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1-2 (HPA) : out of range
50 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.0231, expected range: 0.0115 0.0115