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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-09-22 18:00

iasi
METOP-B IASI RADIANCES CHANNEL 128 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3592, expected range: 0.3845 0.4182
METOP-B IASI RADIANCES CHANNEL 141 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3079, expected range: 0.3312 0.3586
METOP-B IASI RADIANCES CHANNEL 61 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2584, expected range: 0.2948 0.3186
METOP-B IASI RADIANCES CHANNEL 79 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2707, expected range: 0.3063 0.3322
METOP-B IASI RADIANCES CHANNEL 133 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2238, expected range: 0.2719 0.2955
METOP-B IASI RADIANCES CHANNEL 66 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2696, expected range: 0.2993 0.3271
METOP-B IASI RADIANCES CHANNEL 111 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2152, expected range: 0.2437 0.2684
METOP-B IASI RADIANCES CHANNEL 131 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3323, expected range: 0.3592 0.3803
METOP-B IASI RADIANCES CHANNEL 138 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3399, expected range: 0.3736 0.4085
METOP-B IASI RADIANCES CHANNEL 146 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1957, expected range: 0.2269 0.2636
METOP-B IASI RADIANCES CHANNEL 189 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2632, expected range: 0.2841 0.3097
METOP-C IASI RADIANCES CHANNEL 61 : out of range
4 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3654, expected range: 0.2456 0.3022
Considerable: stdev_fgdepar=0.3344, expected range: 0.3775 0.4443
METOP-C IASI RADIANCES CHANNEL 63 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2687, expected range: 0.1099 0.1998
METOP-C IASI RADIANCES CHANNEL 128 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2663, expected range: 0.1170 0.2009
METOP-C IASI RADIANCES CHANNEL 59 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3983, expected range: 0.2886 0.3304
Severely_persistent: stdev_fgdepar=0.3175, expected range: 0.3592 0.4077
METOP-C IASI RADIANCES CHANNEL 79 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4265, expected range: 0.2859 0.3256
METOP-C IASI RADIANCES CHANNEL 81 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3866, expected range: 0.2705 0.3249
METOP-C IASI RADIANCES CHANNEL 83 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4591, expected range: 0.2569 0.3338
METOP-C IASI RADIANCES CHANNEL 85 : out of range
3 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3963, expected range: 0.2032 0.2842
Considerable: stdev_fgdepar=0.2928, expected range: 0.3305 0.3922
METOP-C IASI RADIANCES CHANNEL 386 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0458, expected range: 0.0862 0.0958
METOP-C IASI RADIANCES CHANNEL 66 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3146, expected range: 0.3574 0.4057
METOP-B IASI RADIANCES (26 channels affected) : out of range
Severe: avg_biascorr=0.4415, expected range: -0.0199 0.1672
METOP-C IASI RADIANCES (31 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.1727, expected range: 0.2242 0.2303
METOP-C IASI RADIANCES CHANNEL 49 : out of range
Considerable: stdev_fgdepar=0.3577, expected range: 0.3972 0.4647
METOP-C IASI RADIANCES CHANNEL 170 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.2456, expected range: 0.2801 0.3470
airs
AQUA AIRS RADIANCES (32 channels affected) : out of range
Slight: obs_number=1612.0000, expected range: 2872.3607 6294.7504
mwhs2
All FY-3C MWHS2 ALLSKY ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 24821.13
atms
NPP ATMS RADIANCES CHANNEL 11 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3672, expected range: -0.3284 -0.3032
NPP ATMS RADIANCES CHANNEL 9 : out of range
38 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5517, expected range: -0.4736 -0.4317
NPP ATMS RADIANCES (15 channels affected) : out of range
Considerable: obs_number=4854.0000, expected range: 9812.1831 12862.7058
scatt
All HY-2B SCATTEROMETER Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 115134.97
resat
NOAA-19 SBUV OZONE, TOP (21 pressure layers affected) : out of range
32 times in the last 10 days for at least one item
Severely_persistent: obs_number=99.0000, expected range: 60.4576 68.2921
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 160-161 (HPA) : out of range
3 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.2507, expected range: 0.1163 0.2297
METOP-B GOME-2 OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
14 times in the last 10 days for at least one item
Slight: obs_number=31359.0000, expected range: 15950.6211 24241.8471