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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 12:00

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=0.3286, expected range: 0.2883 0.2963
METOP-B IASI RADIANCES CHANNEL 38 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2819, expected range: 0.2273 0.2327
METOP-B IASI RADIANCES CHANNEL 49 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3492, expected range: 0.3101 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=0.3706, expected range: 0.3274 0.3343
METOP-B IASI RADIANCES CHANNEL 87 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2509, expected range: 0.1558 0.2051
METOP-B IASI RADIANCES CHANNEL 109 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2701, expected range: 0.2005 0.2318
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=0.3284, expected range: 0.2553 0.2719
METOP-B IASI RADIANCES CHANNEL 122 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3292, expected range: 0.2566 0.2613
METOP-B IASI RADIANCES CHANNEL 148 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2749, expected range: 0.2245 0.2382
METOP-B IASI RADIANCES CHANNEL 154 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2466, expected range: 0.1954 0.2047
METOP-B IASI RADIANCES CHANNEL 16 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4269, expected range: 0.3584 0.3917
METOP-B IASI RADIANCES CHANNEL 74 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3279, expected range: 0.2768 0.3023
METOP-B IASI RADIANCES CHANNEL 303 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2518, expected range: 0.2165 0.2325
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=-0.0073, expected range: 0.0774 0.1186
METOP-B IASI RADIANCES CHANNEL 113 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2785, expected range: 0.3041 0.3225
METOP-B IASI RADIANCES CHANNEL 138 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2547, expected range: 0.2751 0.2980
METOP-B IASI RADIANCES CHANNEL 157 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2565, expected range: 0.2775 0.2947
METOP-B IASI RADIANCES CHANNEL 170 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2618, expected range: 0.2807 0.3029
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=-0.0315, expected range: 0.0862 0.0993
Atmospheric Motion Vector
All GOES-17 AMV CLOUDY WV3 ALL LAYERS Global : all data missing
Severely_persistent: obs_number=0, expected range: 1428.11 4121.73
resat
AURA OMI OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-1.5166, expected range: -3.7152 -2.6772
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1010-1011 (HPA) : out of range
29 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=2.5921, expected range: 1.2400 1.9796
METOP-B GOME-2 OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.6908, expected range: -0.7913 -0.7564