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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

iasi
METOP-B IASI RADIANCES CHANNEL 70 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3271, expected range: 0.2564 0.2963
METOP-B IASI RADIANCES CHANNEL 51 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3239, expected range: 0.0122 0.1609
METOP-B IASI RADIANCES CHANNEL 57 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2992, expected range: -0.0173 0.1337
METOP-B IASI RADIANCES CHANNEL 59 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4293, expected range: 0.1041 0.2779
METOP-B IASI RADIANCES CHANNEL 63 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2992, expected range: -0.0449 0.1164
METOP-B IASI RADIANCES CHANNEL 79 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.5321, expected range: 0.1504 0.3583
Severely_persistent: avg_biascorr=0.2680, expected range: 0.3063 0.3284
METOP-B IASI RADIANCES CHANNEL 38 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2424, expected range: -0.0084 0.1162
METOP-B IASI RADIANCES CHANNEL 178 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2072, expected range: -0.0525 0.0909
METOP-B IASI RADIANCES CHANNEL 61 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2558, expected range: 0.2948 0.3196
METOP-B IASI RADIANCES CHANNEL 133 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2218, expected range: 0.2719 0.2964
METOP-B IASI RADIANCES CHANNEL 66 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2772, expected range: 0.2993 0.3248
METOP-B IASI RADIANCES CHANNEL 111 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2181, expected range: 0.2437 0.2676
METOP-B IASI RADIANCES CHANNEL 131 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3292, expected range: 0.3592 0.3780
METOP-C IASI RADIANCES CHANNEL 146 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2644, expected range: 0.2863 0.3017
METOP-C IASI RADIANCES CHANNEL 128 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2715, expected range: 0.1152 0.2009
METOP-C IASI RADIANCES CHANNEL 59 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3779, expected range: 0.2908 0.3304
Severely_persistent: stdev_fgdepar=0.3218, expected range: 0.3592 0.4012
METOP-C IASI RADIANCES CHANNEL 61 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3535, expected range: 0.2460 0.3022
METOP-C IASI RADIANCES CHANNEL 79 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4101, expected range: 0.2859 0.3256
METOP-C IASI RADIANCES CHANNEL 81 : out of range
2 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3684, expected range: 0.2720 0.3249
Considerable: stdev_fgdepar=0.2998, expected range: 0.3405 0.4040
METOP-C IASI RADIANCES CHANNEL 83 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4418, expected range: 0.2537 0.3338
METOP-C IASI RADIANCES CHANNEL 85 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3990, expected range: 0.1984 0.2842
METOP-C IASI RADIANCES CHANNEL 386 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0498, expected range: 0.0862 0.0927
METOP-C IASI RADIANCES CHANNEL 66 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3195, expected range: 0.3574 0.4039
METOP-C IASI RADIANCES (24 channels affected) : out of range
Severe: avg_biascorr=0.1590, expected range: 0.2139 0.2260
METOP-C IASI RADIANCES CHANNEL 144 : out of range
Considerable: stdev_fgdepar=0.2356, expected range: 0.2715 0.3241
METOP-C IASI RADIANCES CHANNEL 163 : out of range
Considerable: stdev_fgdepar=0.2390, expected range: 0.2749 0.3392
METOP-C IASI RADIANCES CHANNEL 170 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.2393, expected range: 0.2801 0.3405
airs
AQUA AIRS RADIANCES CHANNEL 93 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.1169, expected range: -0.0758 -0.0515
AQUA AIRS RADIANCES CHANNEL 99 : out of range
Severe: avg_biascorr=0.0041, expected range: 0.0390 0.0705
AQUA AIRS RADIANCES CHANNEL 104 : out of range
Severe: avg_biascorr=0.0130, expected range: 0.0455 0.0834
AQUA AIRS RADIANCES CHANNEL 116 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.0063, expected range: 0.0447 0.0685
AQUA AIRS RADIANCES CHANNEL 123 : out of range
Severe: avg_biascorr=-0.1181, expected range: -0.0862 -0.0613
AQUA AIRS RADIANCES CHANNEL 128 : out of range
Severe: avg_biascorr=0.0161, expected range: 0.0621 0.1099
AQUA AIRS RADIANCES CHANNEL 129 : out of range
Severe: avg_biascorr=-0.1278, expected range: -0.0855 -0.0399
atms
NPP ATMS RADIANCES CHANNEL 9 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5283, expected range: -0.4736 -0.4510
NOAA20 ATMS RADIANCES CHANNEL 8 : out of range
38 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.6911, expected range: -0.6085 -0.5998
gpsro
All TERRASAR-X GPSRO SETTING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 570.43
All KOMPSAT-5 GPSRO SETTING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 54.39 627.50
Atmospheric Motion Vector
GOES-17 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
1 times in the last 10 days for at least one item
Slight: stdev_press=29.6543, expected range: 26.1237 28.1769