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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-09-21 00:00

iasi
METOP-B IASI RADIANCES CHANNEL 83 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.5191, expected range: 0.4501 0.4854
METOP-B IASI RADIANCES CHANNEL 1658 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0705, expected range: 0.0779 0.0867
METOP-B IASI RADIANCES CHANNEL 57 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2107, expected range: 0.0121 0.1178
METOP-B IASI RADIANCES CHANNEL 63 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2011, expected range: -0.0111 0.1003
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=0.4773, expected range: 0.1995 0.3339
Severely_persistent: avg_biascorr=0.2816, expected range: 0.3325 0.3341
METOP-B IASI RADIANCES CHANNEL 61 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2776, expected range: 0.3101 0.3239
METOP-B IASI RADIANCES CHANNEL 81 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2889, expected range: 0.3115 0.3342
METOP-B IASI RADIANCES CHANNEL 133 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2385, expected range: 0.2938 0.3023
METOP-B IASI RADIANCES CHANNEL 111 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2334, expected range: 0.2570 0.2764
METOP-B IASI RADIANCES CHANNEL 131 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3431, expected range: 0.3902 0.3992
METOP-B IASI RADIANCES CHANNEL 386 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0342, expected range: 0.1102 0.1270
METOP-C IASI RADIANCES CHANNEL 38 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2149, expected range: 0.2486 0.2507
METOP-C IASI RADIANCES CHANNEL 57 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2848, expected range: 0.3218 0.3275
METOP-C IASI RADIANCES CHANNEL 1639 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0549, expected range: 0.0644 0.0731
METOP-C IASI RADIANCES CHANNEL 1658 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1116, expected range: 0.1213 0.1271
airs
AQUA AIRS RADIANCES CHANNEL 93 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0897, expected range: -0.0672 -0.0505
AQUA AIRS RADIANCES CHANNEL 99 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0320, expected range: 0.0494 0.0683
AQUA AIRS RADIANCES CHANNEL 104 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0338, expected range: 0.0535 0.0704
AQUA AIRS RADIANCES CHANNEL 116 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0207, expected range: 0.0522 0.0632
AQUA AIRS RADIANCES CHANNEL 123 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0967, expected range: -0.0793 -0.0608
AQUA AIRS RADIANCES CHANNEL 128 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0289, expected range: 0.0652 0.1025
Severely_persistent: avg_biascorr=-0.0351, expected range: -0.1296 -0.0912
AQUA AIRS RADIANCES CHANNEL 129 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1054, expected range: -0.0794 -0.0464
Severely_persistent: avg_biascorr=-0.1323, expected range: -0.2153 -0.1726
AQUA AIRS RADIANCES CHANNEL 1869 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2022, expected range: 0.2395 0.2871
AQUA AIRS RADIANCES CHANNEL 138 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0300, expected range: -0.1977 -0.0992
ssmis
DMSP-18 SSMIS RADIANCES CHANNEL 7 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=4.7473, expected range: 3.8503 4.2426