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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-10-01 18:00

iasi
METOP-B IASI RADIANCES CHANNEL 70 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3177, expected range: 0.2798 0.2963
METOP-B IASI RADIANCES CHANNEL 135 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3282, expected range: 0.3625 0.3987
METOP-B IASI RADIANCES CHANNEL 141 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3012, expected range: 0.3312 0.3685
METOP-B IASI RADIANCES CHANNEL 38 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2278, expected range: -0.0182 0.1162
METOP-B IASI RADIANCES CHANNEL 51 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2977, expected range: -0.0079 0.1609
METOP-B IASI RADIANCES CHANNEL 57 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2817, expected range: -0.0035 0.1337
METOP-B IASI RADIANCES CHANNEL 63 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2632, expected range: -0.0380 0.1164
METOP-B IASI RADIANCES CHANNEL 85 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4531, expected range: 0.0911 0.2746
METOP-B IASI RADIANCES CHANNEL 79 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4808, expected range: 0.2202 0.3583
METOP-B IASI RADIANCES CHANNEL 16 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4190, expected range: 0.3574 0.3917
METOP-B IASI RADIANCES CHANNEL 101 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2943, expected range: 0.2559 0.2717
METOP-B IASI RADIANCES CHANNEL 119 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2799, expected range: 0.2430 0.2636
METOP-B IASI RADIANCES CHANNEL 138 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2643, expected range: 0.2263 0.2415
METOP-B IASI RADIANCES CHANNEL 163 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2510, expected range: 0.2181 0.2368
METOP-B IASI RADIANCES CHANNEL 189 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2537, expected range: 0.2156 0.2318
METOP-B IASI RADIANCES CHANNEL 301 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2504, expected range: 0.2116 0.2337
METOP-B IASI RADIANCES CHANNEL 303 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2558, expected range: 0.2075 0.2325
METOP-C IASI RADIANCES (25 channels affected) : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2035, expected range: 0.2375 0.2519
METOP-C IASI RADIANCES CHANNEL 57 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2211, expected range: -0.0922 0.0719
METOP-C IASI RADIANCES CHANNEL 63 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1998, expected range: -0.0963 0.0525
METOP-C IASI RADIANCES CHANNEL 85 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3996, expected range: 0.0184 0.2312
METOP-C IASI RADIANCES CHANNEL 301 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0086, expected range: 0.0313 0.0652
METOP-C IASI RADIANCES CHANNEL 386 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-0.0055, expected range: 0.0862 0.1328
METOP-C IASI RADIANCES CHANNEL 66 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3331, expected range: 0.3574 0.3844
METOP-C IASI RADIANCES CHANNEL 79 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3170, expected range: 0.3425 0.3688
METOP-C IASI RADIANCES (36 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0781, expected range: 0.1173 0.1629
mwhs2
All FY-3C MWHS2 ALLSKY ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 27533.56
atms
NPP ATMS RADIANCES CHANNEL 11 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3399, expected range: -0.3057 -0.2808
NPP ATMS RADIANCES CHANNEL 9 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5431, expected range: -0.4736 -0.4543
NOAA20 ATMS RADIANCES CHANNEL 8 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.7001, expected range: -0.6085 -0.5964
Atmospheric Motion Vector
METOP-C AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : out of range
Slight: stdev_press=96.2398, expected range: 79.9224 90.5673
scatt
All HY-2B SCATTEROMETER Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 128044.20
resat
METOP-B GOME-2 OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.7000, expected range: -0.8079 -0.7564