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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2019-04-17 18:00

cris
NOAA-20 CrIS 293 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.15 0.20
NOAA-20 CrIS 297 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.15 0.20
NOAA-20 CrIS 301 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.15 0.19
NOAA-20 CrIS 614 radiances : OutOfRange
5 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.23 -0.17
Geostationary CSR
METEOSAT-11 SEVIRI 8 radiances : OutOfRange
4 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.09 0.04
gpsro
All TANDEM-X rising RO bending angles Missing
All COSMIC-6 rising RO bending angles Missing
All TERRA-SAR-X setting RO bending angles Missing
amdar
K2KUIRJA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.10
EFLUNVRA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.58
QYOUNWZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.39
amsua
NOAA-19 AMSU-A 6 radiances : OutOfRange
1 times in the last 10 days for at least one item
Severely: stdev(norm_fg_depar)=0, expected range: 0.74 0.89
NOAA-19 AMSU-A 9 radiances : OutOfRange
1 times in the last 10 days for at least one item
Considerably: stdev(norm_fg_depar)=0, expected range: 0.79 0.94
NOAA-19 AMSU-A 10 radiances : OutOfRange
Slightly: stdev(norm_fg_depar)=0, expected range: 0.79 0.94
Atmospheric Motion Vector
All AQUA cloudy WV 0 40000 Missing
In-Situ measurements
All PILOT Wind Vector difference (m/s) WMO BLOCK 71 0 40000 Missing
All TEMP SHIP Report Temperature (k) North Atlantic 0 40000 Missing
All TEMP SHIP Report Temperature (k) North Atlantic 40000 70000 Missing
All TEMP SHIP Report Temperature (k) North Atlantic 70000 101325 Missing
All TEMP Land Report Temperature (k) 04 0 40000 Missing
All TEMP Land Report Temperature (k) 04 40000 70000 Missing
All TEMP Land Report Temperature (k) 04 70000 101325 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 71 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 71 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 71 70000 101325 Missing
Drifter Buoy Surface pressure (Pa) WMO BLOCK 47 0 0 : OutOfRange
5 times in the last 10 days for at least one item
Slightly: count(*)=4, expected range: 5.30 29.00
BUOYS
1601522 189 Surface pressure (Pa) : OutOfRange
38 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=98, expected range: 0.00 50.00
5401633 189 Surface pressure (Pa) : OutOfRange
15 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=51, expected range: 0.00 50.00
3401500 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
1601601 189 Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
3101547 189 Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, expected range: 0.00 75.00
ship
9V9404 SHIP Report Surface pressure (Pa) : OutOfRange
15 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
VRRD7 SHIP Report Surface pressure (Pa) : OutOfRange
11 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=66, expected range: 0.00 50.00
VRRQ5 SHIP Report Surface pressure (Pa) : OutOfRange
10 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=59, expected range: 0.00 50.00
CGDX Automatic SHIP Report Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
synop
87328 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
71648 170 Surface pressure (Pa) : OutOfRange
18 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
Radiosondes
72363 109 Q (g/kg) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
Severely: rms(fg_depar)=0, expected range: 0.00 0.00