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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-05-22 12:00

amsua
NOAA 15 AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0400, expected range: -0.0116 0.0142
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 7 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5492, expected range: -0.4980 -0.4771
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 7 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5254, expected range: -0.4799 -0.4738
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.6804, expected range: -0.5816 -0.4678
iasi
METOP-C IASI RADIANCES CHANNEL 262 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0470, expected range: 0.0362 0.0401
METOP-C IASI RADIANCES CHANNEL 269 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0740, expected range: -0.0957 -0.0854
METOP-B IASI RADIANCES CHANNEL 2958 : out of range
Considerable: stdev_fgdepar=1.2073, expected range: 1.0277 1.1465
METOP-B IASI RADIANCES CHANNEL 2889 : out of range
Slight: stdev_fgdepar=1.1630, expected range: 0.9789 1.1177
METOP-B IASI RADIANCES CHANNEL 2907 : out of range
Slight: stdev_fgdepar=1.2488, expected range: 1.0706 1.2039
METOP-B IASI RADIANCES CHANNEL 2944 : out of range
Slight: stdev_fgdepar=1.1488, expected range: 0.9673 1.1018
METOP-B IASI RADIANCES CHANNEL 3029 : out of range
Slight: stdev_fgdepar=1.3192, expected range: 1.1618 1.2827
METOP-B IASI RADIANCES CHANNEL 3049 : out of range
Slight: stdev_fgdepar=1.3000, expected range: 1.1296 1.2560
cris
NOAA20 CRIS RADIANCES CHANNEL 92 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0287, expected range: 0.0133 0.0195
NOAA20 CRIS RADIANCES CHANNEL 95 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0586, expected range: 0.0306 0.0454
NOAA20 CRIS RADIANCES CHANNEL 108 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0432, expected range: -0.0947 -0.0697
airs
AQUA AIRS RADIANCES CHANNEL 1104 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4283, expected range: 0.4737 0.4953
AQUA AIRS RADIANCES CHANNEL 262 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2085, expected range: -0.1921 -0.1807
AQUA AIRS RADIANCES CHANNEL 210 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0134, expected range: -0.0593 -0.0230
AQUA AIRS RADIANCES CHANNEL 218 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0140, expected range: -0.0328 -0.0081
AQUA AIRS RADIANCES CHANNEL 226 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0779, expected range: -0.1555 -0.1327
AQUA AIRS RADIANCES CHANNEL 257 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1510, expected range: -0.2245 -0.2177
Severely_persistent: avg_biascorr=-0.3412, expected range: -0.2875 -0.2468
AQUA AIRS RADIANCES CHANNEL 295 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2481, expected range: -0.2059 -0.1658
Severely_persistent: avg_biascorr=0.0715, expected range: 0.0025 0.0292
mhs
METOP-B MHS ALLSKY RADIANCES CHANNEL 4 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1203, expected range: 0.0945 0.0966
METOP-C MHS ALLSKY RADIANCES CHANNEL 5 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1560, expected range: 0.1320 0.1393
atms
NPP ATMS RADIANCES CHANNEL 19 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0177, expected range: -0.1186 -0.0787
NPP ATMS RADIANCES CHANNEL 20 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1538, expected range: 0.0771 0.1000
NPP ATMS RADIANCES CHANNEL 21 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3444, expected range: 0.2623 0.2901
NPP ATMS RADIANCES CHANNEL 22 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.9095, expected range: 0.7863 0.8553
NPP ATMS RADIANCES CHANNEL 13 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1314, expected range: -0.1780 -0.1760
NPP ATMS RADIANCES CHANNEL 14 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0964, expected range: 0.0274 0.0661
NPP ATMS RADIANCES CHANNEL 12 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4130, expected range: -0.3174 -0.2773
NOAA20 ATMS RADIANCES CHANNEL 20 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1408, expected range: -0.2009 -0.1689
NOAA20 ATMS RADIANCES CHANNEL 21 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0868, expected range: 0.0268 0.0522
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3211, expected range: -0.3633 -0.3552
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1690, expected range: -0.2415 -0.2109
NOAA20 ATMS RADIANCES CHANNEL 12 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5063, expected range: -0.4430 -0.3984
Atmospheric Motion Vector
GOES-17 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
1 times in the last 10 days for at least one item
Slight: avg_fgdepar=2.0239, expected range: 1.4628 1.7898
scatt
All HY-2B SCATTEROMETER Global : all data missing
Severe: obs_number=0, expected range: 95081.76 152442.24