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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2019-08-12 12:00

amsua
AQUA/AMSUA RADIANCES CHANNEL 11 : out of range
Considerable: stdev_fgdepar=0.2743, expected range: 0.1700 0.2447
AQUA/AMSUA RADIANCES CHANNEL 12 : out of range
Considerable: stdev_fgdepar=0.4165, expected range: 0.2523 0.3639
iasi
METOP-A/IASI RADIANCES CHANNEL 163 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2538, expected range: 0.2854 0.3459
METOP-C/IASI RADIANCES CHANNEL 249 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0837, expected range: -0.0393 0.0393
METOP-B/IASI RADIANCES (389 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=4075.0000, expected range: 10343.1274 11835.0521
METOP-C/IASI RADIANCES (389 channels affected) : out of range
Severe: obs_number=6559.0000, expected range: 46502.6176 69393.2029
cris
NPP/CRIS RADIANCES CHANNEL 1149 : out of range
30 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=2.0814, expected range: 0.0709 0.3529
NPP/CRIS RADIANCES (172 channels affected) : out of range
3 times in the last 10 days for at least one item
Severe: obs_number=19687.0000, expected range: 8371.5626 8430.0054
NPP/CRIS RADIANCES (11 channels affected) : out of range
3 times in the last 10 days for at least one item
Severe: avg_fgdepar=0.2787, expected range: -0.0062 0.1599
NOAA20/CRIS RADIANCES CHANNEL 45 : out of range
Considerable: stdev_fgdepar=0.1641, expected range: 0.1105 0.1499
NOAA20/CRIS RADIANCES CHANNEL 48 : out of range
Considerable: stdev_fgdepar=0.1632, expected range: 0.0996 0.1494
atms
NOAA20/ATMS RADIANCES CHANNEL 12 : out of range
Severe: stdev_fgdepar=0.2397, expected range: 0.1232 0.1997
NPP/ATMS RADIANCES CHANNEL 12 : out of range
Considerable: stdev_fgdepar=0.2588, expected range: 0.1556 0.2352
gpsro
7018 SETTING HEIGHT 10 : out of range
1 times in the last 10 days for at least one item
Slight: stdev_norm_fgdepar=0.7767, expected range: 0.2100 0.6907
Atmospheric Motion Vector
GOES-16/AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_press=37.2597, expected range: 24.3143 33.2735
GOES-16/AMV CLOUDY WV3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HP : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_press=36.9708, expected range: 23.3548 33.9651
Radiosondes
All LAND TEMP WIND VECTOR DIFF (M/S) ALL LAYERS Missing
LAND TEMP Q (G/KG) PRESSURE LAYER 300-600 (HPA) : out of range
Slight: rms_fgdepar=0.5378, expected range: 0.4128 0.5242
synop
MANUAL LAND SYNOP SURFACE PRESSURE (PA) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=20.9615, expected range: -1.4620 7.0744
BUFR LAND SYNOP SURFACE PRESSURE (PA) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: obs_number=87.0000, expected range: 97.7285 100.1539
Severely_persistent: obs_number=64.0000, expected range: 65.0000 65.0000
Severely_persistent: obs_number=64.0000, expected range: 65.0000 65.0000
All AUTOMATIC LAND SYNOP SURFACE PRESSURE (PA) Missing
BUFR LAND SYNOP RH2M (%) : out of range
2 times in the last 10 days for at least one item
Severe: obs_number=60.0000, expected range: 61.0000 61.0000
AUTOMATIC LAND SYNOP RH2M (%) : out of range
1 times in the last 10 days for at least one item
Slight: obs_number=201.0000, expected range: 218.3486 307.6514
buoy
DRIFTING BUOYS SURFACE PRESSURE (PA) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=120.0000, expected range: 0.0000 0.0000