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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-09-24 12:00

iasi
METOP-B IASI RADIANCES CHANNEL 79 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4236, expected range: 0.3269 0.3628
METOP-B IASI RADIANCES CHANNEL 83 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4376, expected range: 0.3113 0.3601
METOP-B IASI RADIANCES CHANNEL 85 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3983, expected range: 0.2433 0.3194
METOP-B IASI RADIANCES CHANNEL 61 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2693, expected range: 0.2948 0.3097
METOP-B IASI RADIANCES CHANNEL 66 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2698, expected range: 0.2993 0.3171
METOP-B IASI RADIANCES CHANNEL 111 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2254, expected range: 0.2437 0.2602
METOP-B IASI RADIANCES CHANNEL 131 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3229, expected range: 0.3592 0.3702
METOP-B IASI RADIANCES CHANNEL 133 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2333, expected range: 0.2719 0.2786
METOP-B IASI RADIANCES CHANNEL 138 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3440, expected range: 0.3736 0.4063
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=0.3752, expected range: 0.2810 0.3256
Severely_persistent: stdev_fgdepar=0.2844, expected range: 0.3425 0.4164
METOP-C IASI RADIANCES CHANNEL 59 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4613, expected range: 0.0028 0.2522
METOP-C IASI RADIANCES CHANNEL 61 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4339, expected range: -0.0409 0.2264
METOP-C IASI RADIANCES CHANNEL 133 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3221, expected range: -0.1038 0.1379
METOP-C IASI RADIANCES CHANNEL 51 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3617, expected range: -0.2110 0.1003
METOP-C IASI RADIANCES CHANNEL 57 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3331, expected range: -0.2381 0.0719
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=0.3308, expected range: -0.2378 0.0525
METOP-C IASI RADIANCES CHANNEL 85 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.5449, expected range: -0.1635 0.2312
METOP-C IASI RADIANCES CHANNEL 386 : out of range
27 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0234, expected range: 0.0862 0.1181
METOP-C IASI RADIANCES CHANNEL 66 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3018, expected range: 0.3574 0.4208
atms
NPP ATMS RADIANCES CHANNEL 9 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5981, expected range: -0.4736 -0.3999
NOAA20 ATMS RADIANCES CHANNEL 8 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.7615, expected range: -0.6085 -0.5815
Atmospheric Motion Vector
All GOES-17 AMV CLOUDY WV3 ALL LAYERS Global : all data missing
Severely_persistent: obs_number=0, expected range: 1779.88 3181.62
NOAA20 VIIRS-AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA : out of range
Slight: obs_number=1276.0000, expected range: 858.0140 1109.2360
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1010-1011 (HPA) : out of range
31 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=2.9236, expected range: 1.1342 1.9796
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 160-161 (HPA) : out of range
4 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.2404, expected range: 0.1041 0.2297
METOP-B GOME-2 OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
16 times in the last 10 days for at least one item
Slight: obs_number=29560.0000, expected range: 15194.4082 24241.8471
amdar
AMDAR WIND VECTOR DIFF (M/S) (2 pressure layers affected) : missing
Severe: obs_number=0.0000, expected range: 0.0000 321.9005
ADS-C WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: rms_fgdepar=9.2537, expected range: 1.2312 6.3125