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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-09-27 12:00

iasi
METOP-B IASI RADIANCES CHANNEL 133 : out of range
31 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2415, expected range: 0.2719 0.2784
METOP-B IASI RADIANCES CHANNEL 66 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2695, expected range: 0.2993 0.3164
METOP-B IASI RADIANCES CHANNEL 113 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2639, expected range: 0.2917 0.3090
METOP-B IASI RADIANCES CHANNEL 119 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2805, expected range: 0.3026 0.3280
METOP-B IASI RADIANCES CHANNEL 125 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3072, expected range: 0.3479 0.3700
METOP-B IASI RADIANCES CHANNEL 131 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3120, expected range: 0.3592 0.3693
METOP-B IASI RADIANCES CHANNEL 138 : out of range
30 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3267, expected range: 0.3736 0.4012
Severely_persistent: stdev_fgdepar=0.2578, expected range: 0.2238 0.2415
METOP-B IASI RADIANCES CHANNEL 151 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2730, expected range: 0.2964 0.3245
METOP-B IASI RADIANCES CHANNEL 189 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2508, expected range: 0.2841 0.2954
METOP-B IASI RADIANCES CHANNEL 101 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2964, expected range: 0.2459 0.2717
METOP-B IASI RADIANCES CHANNEL 111 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3006, expected range: 0.2486 0.2772
METOP-C IASI RADIANCES CHANNEL 59 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3670, expected range: 0.2963 0.3304
METOP-C IASI RADIANCES CHANNEL 79 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3832, expected range: 0.2948 0.3256
METOP-C IASI RADIANCES CHANNEL 83 : out of range
35 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4043, expected range: 0.2750 0.3338
METOP-C IASI RADIANCES CHANNEL 85 : out of range
33 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3649, expected range: 0.2206 0.2842
METOP-C IASI RADIANCES CHANNEL 386 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-0.0049, expected range: 0.0862 0.1299
mwhs2
All FY-3C MWHS2 ALLSKY ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 28519.70
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 11 : out of range
3 times in the last 10 days for at least one item
Slight: obs_number=7878.0000, expected range: 13636.0362 35147.0495
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 12 : out of range
3 times in the last 10 days for at least one item
Slight: obs_number=7878.0000, expected range: 13535.5595 34988.3833
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 13 : out of range
3 times in the last 10 days for at least one item
Slight: obs_number=6457.0000, expected range: 11166.7582 28550.2132
atms
NPP ATMS RADIANCES CHANNEL 11 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3261, expected range: -0.3057 -0.2786
NPP ATMS RADIANCES CHANNEL 9 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5367, expected range: -0.4736 -0.4035
NOAA20 ATMS RADIANCES CHANNEL 10 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4810, expected range: -0.4350 -0.4251
NOAA20 ATMS RADIANCES CHANNEL 8 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.7256, expected range: -0.6085 -0.5689
ssmis
DMSP-17 SSMIS RADIANCES CHANNEL 17 : out of range
2 times in the last 10 days for at least one item
Severe: avg_biascorr=-2.3193, expected range: -2.9888 -2.6204
Atmospheric Motion Vector
All GOES-17 AMV CLOUDY WV3 ALL LAYERS Global : all data missing
Severely_persistent: obs_number=0, expected range: 1713.81 3391.44
All NOAA-18 AVHRR IR ALL LAYERS Global : all data missing
Severe: obs_number=0, expected range: 52.64 456.12
amdar
WIGOS AMDAR WIND VECTOR DIFF (M/S) (2 pressure layers affected) : missing
Severe: obs_number=0.0000, expected range: 0.0000 1939.9565