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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-04-09 12:00

airs
AQUA AIRS 1111 radiances : DataMissing
AQUA AIRS 227 radiances : OutOfRange
11 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.58 -0.54
Geostationary CSR
METEOSAT-8 55 2 radiances : OutOfRange
8 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=1, expected range: 0.67 1.39
gpsro
All COSMIC-6 rising RO bending angles Missing
Ozone
METOP-B GOME-2 layer ozone, top pressure 1 : OutOfRange
Slightly: stdev_fg_depar_du=6, expected range: 4.50 6.31
airep
AAL73 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
amdar
L2XDXKBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=86, expected range: 0.00 70.00
R2YY1YRA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
Atmospheric Motion Vector
All AQUA cloudy WV 0 40000 Missing
All GOES-15 VIS1 70000 110000 Missing
In-Situ measurements
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 15 0 0 Missing
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 93 0 0 Missing
All SYNOP Surface pressure (Pa) WMO BLOCK 62 0 0 Missing
All European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 11 0 400 Missing
All Japanese Wind Profiler Wind Vector difference (m/s) WMO BLOCK 47 0 400 Missing
TEMP Land Report Temperature (k) WMO BLOCK 13 40000 70000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=86, expected range: 163.00 181.00
TEMP Land Report Temperature (k) WMO BLOCK 13 70000 101325 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=80, expected range: 140.00 180.00
All TEMP Land Report Temperature (k) WMO BLOCK 62 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 62 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 62 70000 101325 Missing
All AIREP Wind Vector difference (m/s) Asia 40000 70000 Missing
All AIREP Wind Vector difference (m/s) Asia 70000 101325 Missing
All AIREP Wind Vector difference (m/s) Indian Ocean 40000 70000 Missing
All AIREP Wind Vector difference (m/s) Indian Ocean 70000 101325 Missing
Drifter Buoy Surface pressure (Pa) WMO BLOCK 13 0 0 : OutOfRange
3 times in the last 10 days for at least one item
Considerably: rms(fg_depar)=98, expected range: 11.40 75.00
SHIP Wind Vector difference (m/s) South Pacific 1 1 : OutOfRange
Slightly: rms(fg_depar)=4, expected range: 2.00 4.50
TEMP Land Report Temperature (k) WMO BLOCK 13 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=157, expected range: 173.00 450.00
BUOYS
5401596 189 Surface pressure (Pa) : OutOfRange
10 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
ship
TBWUK86 SHIP Report Wind Vector difference (m/s) : OutOfRange
Severely_persistent: freq(qc_pge)=61, expected range: 0.00 50.00
VRWN7 SHIP Report Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=95, expected range: 0.00 50.00
VRYO3 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
synop
40942 SYNOP Surface pressure (Pa) : OutOfRange
30 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
Radiosondes
27459 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00