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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2019-08-17 12:00

amsua
AQUA/AMSUA RADIANCES CHANNEL 11 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1916, expected range: 0.2095 0.2246
iasi
METOP-A/IASI RADIANCES CHANNEL 5399 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4096, expected range: 0.2426 0.3319
METOP-C/IASI RADIANCES CHANNEL 97 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1662, expected range: -0.0336 0.0824
cris
NPP/CRIS RADIANCES CHANNEL 622 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.2491, expected range: 0.0424 0.1599
NPP/CRIS RADIANCES CHANNEL 1149 : out of range
53 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=2.9836, expected range: -0.3076 0.3155
Severely_persistent: stdev_fgdepar=1.7743, expected range: 0.0709 0.3529
NPP/CRIS RADIANCES CHANNEL 1157 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.9874, expected range: -0.2954 0.3049
NPP/CRIS RADIANCES CHANNEL 1189 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.2475, expected range: -0.1186 0.1254
NOAA20/CRIS RADIANCES CHANNEL 33 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2645, expected range: 0.1486 0.2242
NPP/CRIS RADIANCES (43 channels affected) : out of range
Severe: obs_number=12569.0000, expected range: 7525.4427 8057.7195
mhs
ALLSKY METOP-A/MHS RADIANCES CHANNEL 3 : out of range
3 times in the last 10 days for at least one item
Considerable: stdev_norm_fgdepar=0.6364, expected range: 0.2371 0.5273
amsr2
ALLSKY AMSR2 GCOM-W1 RADIANCES CHANNEL 10 : out of range
Considerable: stdev_norm_fgdepar=0.5198, expected range: 0.3282 0.4805
atms
NPP/ATMS RADIANCES (12 channels affected) : out of range
Considerable: obs_number=2402.0000, expected range: 2752.8773 3971.7017
Geostationary CSR
GOES-15/IMAGER RADIANCES CHANNEL 2 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: obs_number=63531.0000, expected range: 7132.5593 17964.0568
GOES-15/IMAGER RADIANCES CHANNEL 3 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: obs_number=18269.0000, expected range: 1418.6438 7913.6680
All GOES-16/ABI RADIANCES ALL CHANNELS Missing
Radiosondes
HIGH RESO LAND TEMP Q (G/KG) (3 pressure layers affected) : out of range
6 times in the last 10 days for at least one item
Severely_persistent: obs_number=93.0000, expected range: 182.6189 197.1458
synop
AUTOMATIC LAND SYNOP SURFACE PRESSURE (PA) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: obs_number=969.0000, expected range: 1135.0610 1298.5861
BUFR LAND SYNOP SURFACE PRESSURE (PA) : out of range
2 times in the last 10 days for at least one item
Severely_persistent: rms_fgdepar=80.7002, expected range: 39.0119 59.3549
Severely_persistent: rms_fgdepar=69.0007, expected range: 39.4981 53.9882
Severely_persistent: rms_fgdepar=115.8460, expected range: 41.5492 72.8307
Severe: obs_number=102.0000, expected range: 103.0000 103.0000
buoy
MOORED BUOYS WIND VECTOR DIFF (M/S) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_pge=0.8615, expected range: -1.0459 0.7500
DRIFTING BUOYS SURFACE PRESSURE (PA) : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=4.3373, expected range: 0.0000 0.0000