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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-03-13 00:00

airs
AQUA AIRS 310 radiances : OutOfRange
13 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.82 -0.77
gpsro
All COSMIC-6 setting RO bending angles Missing
Ozone
NOAA-19 SBUV layer ozone, top pressure 10130 : OutOfRange
Slightly: stdev_fg_depar_du=7, expected range: 0.39 6.61
amdar
POP0JHBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=93, expected range: 0.00 50.00
YUJVMUJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=7, expected range: 0.32 4.90
Severely: rms(fg_depar)=9, expected range: 0.31 5.70
3TAJV3JA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
1OXRP1ZA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
Atmospheric Motion Vector
All NOAA-15 IR 70000 110000 Missing
All AQUA cloudy WV 0 40000 Missing
In-Situ measurements
All Japanese Wind Profiler Wind Vector difference (m/s) WMO BLOCK 47 0 400 Missing
All European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 11 0 400 Missing
All Land Automatic Report Surface pressure (Pa) 02 0 0 Missing
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 10 0 0 Missing
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 91 0 0 Missing
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 25 0 0 Missing
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
Drifter Buoy Surface pressure (Pa) WMO BLOCK 15 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=231, expected range: 167.00 230.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 33 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: rms(fg_depar)=95, expected range: 14.40 89.00
TEMP Land Report Temperature (k) 07 0 40000 : OutOfRange
Slightly: count(*)=637, expected range: 660.00 950.00
TEMP Land Report Temperature (k) WMO BLOCK 11 40000 70000 : OutOfRange
Slightly: avg(fg_depar)=0, expected range: -0.62 0.66
Slightly: rms(fg_depar)=1, expected range: 0.00 1.09
TEMP Land Report Wind Vector difference (m/s) 07 0 40000 : OutOfRange
Slightly: rms(fg_depar)=7, expected range: 1.34 6.40
BUOYS
3301530 189 Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
ship
VRWL4 SHIP Report Wind Vector difference (m/s) : OutOfRange
34 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=88, expected range: 0.00 50.00
SBPQ Automatic SHIP Report Surface pressure (Pa) : OutOfRange
33 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=81, expected range: 0.00 50.00
42365 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
5 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
VRRB6 SHIP Report Wind Vector difference (m/s) : OutOfRange
8 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
C6SE3 SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
synop
04158 170 Surface pressure (Pa) : OutOfRange
38 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=96, expected range: 0.00 50.00
16364 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
Radiosondes
17516 109 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=3, expected range: -0.94 0.89
Severely: rms(fg_depar)=4, expected range: 0.00 2.60
11520 109 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-1, expected range: -0.77 0.84
Severely: rms(fg_depar)=1, expected range: 0.00 1.06
94996 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
06011 109 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=3, expected range: -1.09 1.13