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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-10-05 06:00

iasi
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=0.4332, expected range: 0.4665 0.5104
METOP-B IASI RADIANCES CHANNEL 116 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3462, expected range: 0.3765 0.4094
Severely_persistent: avg_biascorr=0.3004, expected range: 0.2496 0.2719
METOP-B IASI RADIANCES CHANNEL 122 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3533, expected range: 0.3808 0.4123
METOP-B IASI RADIANCES CHANNEL 128 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3562, expected range: 0.3845 0.4146
METOP-B IASI RADIANCES CHANNEL 135 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3301, expected range: 0.3625 0.3854
METOP-B IASI RADIANCES CHANNEL 141 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3015, expected range: 0.3312 0.3574
METOP-B IASI RADIANCES CHANNEL 154 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2311, expected range: 0.1871 0.2047
METOP-B IASI RADIANCES CHANNEL 38 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2691, expected range: 0.2214 0.2327
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=0.2657, expected range: 0.2209 0.2382
METOP-B IASI RADIANCES CHANNEL 16 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4198, expected range: 0.3602 0.3917
METOP-B IASI RADIANCES CHANNEL 72 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3213, expected range: 0.2754 0.2980
METOP-B IASI RADIANCES CHANNEL 89 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3089, expected range: 0.2647 0.2843
METOP-B IASI RADIANCES CHANNEL 131 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2753, expected range: 0.2308 0.2533
METOP-B IASI RADIANCES CHANNEL 138 : out of range
31 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2609, expected range: 0.2285 0.2415
METOP-B IASI RADIANCES CHANNEL 301 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2478, expected range: 0.2164 0.2337
METOP-B IASI RADIANCES CHANNEL 303 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2490, expected range: 0.2174 0.2325
METOP-C IASI RADIANCES CHANNEL 51 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2484, expected range: 0.1905 0.2225
METOP-C IASI RADIANCES CHANNEL 85 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3490, expected range: 0.2724 0.2842
METOP-C IASI RADIANCES CHANNEL 128 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2335, expected range: 0.1675 0.2009
METOP-C IASI RADIANCES CHANNEL 135 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2210, expected range: 0.1556 0.1896
METOP-C IASI RADIANCES CHANNEL 57 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2322, expected range: 0.1772 0.2048
METOP-C IASI RADIANCES CHANNEL 61 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3345, expected range: 0.2841 0.3022
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=0.2321, expected range: 0.1755 0.1998
METOP-C IASI RADIANCES CHANNEL 83 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3902, expected range: 0.3215 0.3338
METOP-C IASI RADIANCES CHANNEL 133 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2553, expected range: 0.2121 0.2353
Severely_persistent: stdev_fgdepar=0.2741, expected range: 0.3051 0.3162
METOP-C IASI RADIANCES CHANNEL 141 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1961, expected range: 0.1398 0.1701
METOP-C IASI RADIANCES CHANNEL 1578 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1607, expected range: -0.1438 -0.1256
METOP-C IASI RADIANCES CHANNEL 1579 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1076, expected range: -0.0934 -0.0774
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=0.0093, expected range: 0.0862 0.1045
METOP-C IASI RADIANCES CHANNEL 131 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2574, expected range: 0.2788 0.3009
METOP-C IASI RADIANCES (32 channels affected) : out of range
2 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0786, expected range: 0.1173 0.1565
mhs
METOP-C MHS ALLSKY RADIANCES CHANNEL 3 : out of range
Slight: obs_number=19910.0000, expected range: 21286.0354 26434.1999
METOP-C MHS ALLSKY RADIANCES CHANNEL 4 : out of range
Slight: obs_number=18607.0000, expected range: 20574.8237 25126.5292
mwhs2
All FY-3C MWHS2 ALLSKY ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 27335.32
gpsro
All TERRASAR-X GPSRO SETTING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 33.48 846.20
All GRACE C GPSRO RISING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 1083.82
All KOMPSAT-5 GPSRO SETTING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 0.00 818.56
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1010-1011 (HPA) : out of range
28 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=3.0582, expected range: 1.1808 1.9796
METOP-B GOME-2 OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
26 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.6904, expected range: -0.7992 -0.7564