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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-12-01 18:00

amsua
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 9 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0045, expected range: 0.0027 0.0036
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 7 : out of range
Considerable: stdev_norm_fgdepar=1.0766, expected range: 0.7620 0.9557
iasi
METOP-B IASI RADIANCES CHANNEL 1658 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2075, expected range: 0.1448 0.1764
METOP-B IASI RADIANCES CHANNEL 1509 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0176, expected range: -0.0821 -0.0605
METOP-B IASI RADIANCES CHANNEL 1652 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2663, expected range: 0.2111 0.2317
METOP-B IASI RADIANCES CHANNEL 364 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1959, expected range: -0.1811 -0.1626
METOP-B IASI RADIANCES (32 channels affected) : out of range
Severe: avg_biascorr=-0.0233, expected range: -0.0983 -0.0764
METOP-B IASI RADIANCES (21 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0775, expected range: 0.0910 0.1035
METOP-C IASI RADIANCES (31 channels affected) : out of range
Severe: avg_biascorr=-0.0871, expected range: -0.1703 -0.1480
METOP-B IASI RADIANCES CHANNEL 303 : out of range
Considerable: stdev_fgdepar=0.3952, expected range: 0.2722 0.3425
METOP-B IASI RADIANCES CHANNEL 301 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.3642, expected range: 0.2693 0.3263
METOP-B IASI RADIANCES CHANNEL 176 : out of range
4 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.3489, expected range: 0.2739 0.3237
METOP-C IASI RADIANCES CHANNEL 303 : out of range
Considerable: stdev_fgdepar=0.3938, expected range: 0.2548 0.3365
METOP-C IASI RADIANCES CHANNEL 104 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.3817, expected range: 0.2947 0.3451
METOP-C IASI RADIANCES CHANNEL 301 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.3436, expected range: 0.2536 0.3067
cris
NOAA20 CRIS RADIANCES CHANNEL 121 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0064, expected range: 0.0432 0.0783
NOAA20 CRIS RADIANCES CHANNEL 123 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0679, expected range: -0.0291 0.0103
NOAA20 CRIS RADIANCES CHANNEL 109 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1266, expected range: -0.0987 -0.0694
NOAA20 CRIS RADIANCES CHANNEL 114 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1437, expected range: 0.0864 0.1160
NOAA20 CRIS RADIANCES CHANNEL 963 : out of range
35 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0356, expected range: -0.0887 -0.0713
NOAA20 CRIS RADIANCES CHANNEL 657 : out of range
27 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1068, expected range: 0.0500 0.0820
NOAA20 CRIS RADIANCES CHANNEL 912 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2213, expected range: 0.1540 0.1746
NOAA20 CRIS RADIANCES CHANNEL 929 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3736, expected range: 0.2840 0.3258
NOAA20 CRIS RADIANCES (27 channels affected) : out of range
Severe: avg_biascorr=-0.1312, expected range: -0.1198 -0.1128
atms
NPP ATMS RADIANCES CHANNEL 14 : out of range
67 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4980, expected range: 0.4090 0.4509
Severely_persistent: avg_biascorr=-0.0143, expected range: -0.0926 -0.0619
Severely_persistent: avg_biascorr=-0.2294, expected range: -0.0884 -0.0706
Severely_persistent: avg_biascorr=-0.1574, expected range: -0.0922 -0.0068
NPP ATMS RADIANCES CHANNEL 15 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.8216, expected range: 0.7102 0.7345
NPP ATMS RADIANCES CHANNEL 13 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4072, expected range: -0.2918 -0.2906
NOAA20 ATMS RADIANCES CHANNEL 15 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.7671, expected range: 0.6496 0.6617
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
77 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4681, expected range: 0.3679 0.4014
Severely_persistent: avg_biascorr=-0.5233, expected range: -0.3951 -0.3791
Severely_persistent: avg_biascorr=-0.3565, expected range: -0.3045 -0.2682
gpsro
COSMIC2-E1 GPSRO SETTING (24 impact heights affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=402.0000, expected range: 804.9705 1629.8073
Atmospheric Motion Vector
METEOSAT-11 AMV IR3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: obs_number=514.0000, expected range: 202.6199 400.8801
Geostationary CSR
All GOES-16 ABI ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 29530.53 41578.36
All GOES-17 GEOS RADIANCES ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 10554.87 76149.96
scatt
All HY-2B SCATTEROMETER Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 141778.64
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1-2 (HPA) : out of range
51 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.0231, expected range: 0.0115 0.0115
Slight: avg_fgdepar=-0.0198, expected range: -0.0058 -0.0058
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 30-31 (HPA) : out of range
Slight: avg_fgdepar=0.0186, expected range: 0.0208 0.0269