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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-11-26 12:00

amsua
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 9 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0039, expected range: 0.0030 0.0035
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7271, expected range: 0.5485 0.5914
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6841, expected range: 0.5293 0.5886
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7105, expected range: 0.5587 0.6041
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7265, expected range: 0.5479 0.5903
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6608, expected range: 0.5104 0.5871
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6702, expected range: 0.4956 0.5504
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6183, expected range: 0.4846 0.5435
iasi
METOP-B IASI RADIANCES CHANNEL 205 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0177, expected range: 0.0318 0.0960
METOP-B IASI RADIANCES CHANNEL 1626 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1341, expected range: 0.0866 0.1101
METOP-C IASI RADIANCES CHANNEL 249 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0454, expected range: -0.0475 0.0021
METOP-C IASI RADIANCES CHANNEL 205 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1078, expected range: -0.0390 0.0172
METOP-C IASI RADIANCES CHANNEL 148 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2006, expected range: 0.2288 0.2330
METOP-C IASI RADIANCES CHANNEL 128 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2129, expected range: 0.2569 0.2651
METOP-C IASI RADIANCES CHANNEL 122 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2211, expected range: 0.2477 0.2698
METOP-C IASI RADIANCES CHANNEL 66 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2476, expected range: 0.2720 0.2915
METOP-C IASI RADIANCES CHANNEL 59 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3053, expected range: 0.3564 0.3566
METOP-C IASI RADIANCES (51 channels affected) : out of range
Severe: stdev_fgdepar=0.2538, expected range: 0.2721 0.2946
METOP-C IASI RADIANCES (21 channels affected) : out of range
Severe: avg_biascorr=0.6214, expected range: 0.3554 0.4902
METOP-B IASI RADIANCES CHANNEL 161 : out of range
4 times in the last 10 days for at least one item
Considerable: avg_fgdepar=-0.0304, expected range: -0.0110 0.0156
METOP-B IASI RADIANCES CHANNEL 141 : out of range
2 times in the last 10 days for at least one item
Considerable: avg_fgdepar=-0.0288, expected range: -0.0082 0.0213
METOP-B IASI RADIANCES (111 channels affected) : out of range
Considerable: obs_number=1864.0000, expected range: 1084.8623 1523.9377
cris
NOAA20 CRIS RADIANCES CHANNEL 991 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4531, expected range: 0.3976 0.4127
NOAA20 CRIS RADIANCES CHANNEL 989 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1320, expected range: 0.0916 0.1088
NOAA20 CRIS RADIANCES CHANNEL 965 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1655, expected range: -0.2139 -0.2076
NOAA20 CRIS RADIANCES (14 channels affected) : out of range
Severe: avg_biascorr=0.2749, expected range: 0.1104 0.1845
airs
AQUA AIRS RADIANCES CHANNEL 98 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3878, expected range: 0.0865 0.1112
AQUA AIRS RADIANCES CHANNEL 21 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1887, expected range: -0.0777 0.0688
AQUA AIRS RADIANCES CHANNEL 15 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2012, expected range: -0.0245 0.1008
AQUA AIRS RADIANCES CHANNEL 1471 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.7228, expected range: -0.5180 0.1893
AQUA AIRS RADIANCES CHANNEL 1520 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3440, expected range: 0.3090 0.3140
AQUA AIRS RADIANCES CHANNEL 110 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0642, expected range: -0.0420 -0.0154
AQUA AIRS RADIANCES (13 channels affected) : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.1374, expected range: -0.0396 0.0532
AQUA AIRS RADIANCES (20 channels affected) : out of range
Severe: stdev_fgdepar=0.8574, expected range: 0.9989 1.0344
gpsro
METOP-B GRAS SETTING HEIGHT 4-6 KM : out of range
Slight: avg_norm_fgdepar=0.0819, expected range: -0.0673 0.0513
amdar
ADS-C WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : missing
2 times in the last 10 days for at least one item
Severe: obs_number=0.0000, expected range: 0.0000 308.5299