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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-10-06 00:00

iasi
METOP-B IASI RADIANCES CHANNEL 70 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3227, expected range: 0.2892 0.2963
METOP-B IASI RADIANCES CHANNEL 38 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2737, expected range: 0.2262 0.2327
Severely_persistent: avg_biascorr=0.1664, expected range: 0.0593 0.1162
METOP-B IASI RADIANCES CHANNEL 49 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3535, expected range: 0.3092 0.3232
METOP-B IASI RADIANCES CHANNEL 55 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3644, expected range: 0.3266 0.3343
METOP-B IASI RADIANCES CHANNEL 87 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2544, expected range: 0.1541 0.2051
METOP-B IASI RADIANCES CHANNEL 109 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2722, expected range: 0.2001 0.2318
METOP-B IASI RADIANCES CHANNEL 116 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3235, expected range: 0.2555 0.2719
METOP-B IASI RADIANCES CHANNEL 148 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2782, expected range: 0.2234 0.2382
METOP-B IASI RADIANCES CHANNEL 154 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2429, expected range: 0.1946 0.2047
METOP-B IASI RADIANCES CHANNEL 59 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3200, expected range: 0.2335 0.2779
METOP-B IASI RADIANCES CHANNEL 79 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4483, expected range: 0.3206 0.3583
METOP-B IASI RADIANCES CHANNEL 83 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.5241, expected range: 0.3286 0.3973
METOP-B IASI RADIANCES CHANNEL 85 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4092, expected range: 0.2077 0.2746
METOP-B IASI RADIANCES CHANNEL 178 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1149, expected range: 0.0593 0.0909
METOP-B IASI RADIANCES CHANNEL 51 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2555, expected range: 0.0909 0.1609
METOP-B IASI RADIANCES CHANNEL 57 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2212, expected range: 0.0931 0.1337
METOP-B IASI RADIANCES CHANNEL 63 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2191, expected range: 0.0639 0.1164
METOP-B IASI RADIANCES CHANNEL 141 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1919, expected range: 0.0400 0.1260
METOP-B IASI RADIANCES CHANNEL 386 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0185, expected range: 0.0774 0.1136
METOP-C IASI RADIANCES CHANNEL 178 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1442, expected range: 0.1597 0.1644
METOP-C IASI RADIANCES CHANNEL 51 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1688, expected range: 0.0215 0.1003
METOP-C IASI RADIANCES CHANNEL 57 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1524, expected range: 0.0183 0.0719
METOP-C IASI RADIANCES CHANNEL 59 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2936, expected range: 0.2084 0.2522
METOP-C IASI RADIANCES CHANNEL 63 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1567, expected range: 0.0134 0.0525
METOP-C IASI RADIANCES CHANNEL 83 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4776, expected range: 0.2970 0.3765
METOP-C IASI RADIANCES CHANNEL 85 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3521, expected range: 0.1571 0.2312
METOP-C IASI RADIANCES CHANNEL 79 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4083, expected range: 0.2876 0.3488
METOP-C IASI RADIANCES CHANNEL 301 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0114, expected range: 0.0313 0.0390
METOP-C IASI RADIANCES CHANNEL 119 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2755, expected range: 0.2358 0.2557
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=0.0249, expected range: 0.0862 0.1020
METOP-C IASI RADIANCES CHANNEL 131 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2590, expected range: 0.2788 0.2981
METOP-C IASI RADIANCES CHANNEL 163 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2459, expected range: 0.2749 0.2836
METOP-C IASI RADIANCES (32 channels affected) : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0676, expected range: 0.1173 0.1489
ssmis
DMSP-18 SSMIS RADIANCES CHANNEL 9 : out of range
Slight: obs_number=4989.0000, expected range: 6193.0037 10828.3903
DMSP-18 SSMIS RADIANCES CHANNEL 10 : out of range
Slight: obs_number=6612.0000, expected range: 8194.6975 14056.1510
DMSP-18 SSMIS RADIANCES CHANNEL 11 : out of range
Slight: obs_number=6607.0000, expected range: 8193.1057 14114.4700
gpsro
All TERRASAR-X GPSRO SETTING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 94.63 731.86
All GRACE C GPSRO RISING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 1073.01
SENTINEL 6A GPSRO SETTING HEIGHT 12-14 KM : out of range
Slight: stdev_norm_fgdepar=1.7035, expected range: 0.9251 1.4519
SENTINEL 6A GPSRO RISING (14 impact heights affected) : out of range
Slight: obs_number=282.0000, expected range: 923.6839 2078.3767
scatt
All HY-2B SCATTEROMETER Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 121194.89
resat
AURA OMI OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
3 times in the last 10 days for at least one item
Slight: obs_number=10414.0000, expected range: 5991.4583 9415.6442
METOP-B GOME-2 OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
7 times in the last 10 days for at least one item
Slight: obs_number=27919.0000, expected range: 16050.0431 24241.8471