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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2019-01-14 12:00

cris
NPP CrIS 21 radiances : OutOfRange
7 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.06 0.18
22 NOAA-20 CrIS 9 radiances have reduced counts (see example): OutOfRange
Slightly: count(*)=11343, expected range: 11400.00 11800.00
gpsro
All COSMIC-1 setting RO bending angles Missing
All COSMIC-1 rising RO bending angles Missing
All COSMIC-6 rising RO bending angles Missing
amdar
SL0010 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.00 1.12
CDSXHQRA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.40
WEKMW2BA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.91
AG4EOGBA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.30
4JY0YGBA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.40
Atmospheric Motion Vector
All NPP IR 0 40000 Missing
In-Situ measurements
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 72 0 0 Missing
All SYNOP RH2m (%s) WMO BLOCK 23 70000 101325 Missing
All SYNOP RH2m (%s) WMO BLOCK 36 70000 101325 Missing
All SYNOP RH2m (%s) WMO BLOCK 44 70000 101325 Missing
All SYNOP RH2m (%s) WMO BLOCK 51 70000 101325 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 87 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 91 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 94 0 40000 Missing
All TEMP Land Report Q (g/kg) WMO BLOCK 13 0 40000 Missing
TEMP Land Report Temperature (k) WMO BLOCK 68 70000 101325 : OutOfRange
Considerably: rms(fg_depar)=3, expected range: 0.00 2.60
Drifter Buoy Surface pressure (Pa) WMO BLOCK 47 0 0 : OutOfRange
Slightly: count(*)=15, expected range: 15.80 19.80
Drifter Buoy Surface pressure (Pa) WMO BLOCK 65 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=15, expected range: 15.50 20.00
BUOYS
6301670 189 Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=63, expected range: 0.00 50.00
4601615 189 Surface pressure (Pa) : OutOfRange
6 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
ship
PHAQ SHIP Report Wind Vector difference (m/s) : OutOfRange
5 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=56, expected range: 0.00 50.00
VRID6 SHIP Report Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=51, expected range: 0.00 50.00
VAAZ Automatic SHIP Report Surface pressure (Pa) : OutOfRange
9 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
synop
68116 Land Automatic Report Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=88, expected range: 0.00 50.00
41167 Land Automatic Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
17100 SYNOP 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
12510 170 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 75.00
08156 170 Surface pressure (Pa) : OutOfRange
12 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, expected range: 0.00 75.00
Radiosondes
42492 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=12, expected range: 1.17 8.00
Severely: rms(fg_depar)=17, expected range: 1.08 9.20
71926 109 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=3, expected range: -0.29 0.86
Severely: rms(fg_depar)=3, expected range: 0.15 1.90
61998 109 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.04 0.67
68263 109 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=5, expected range: 0.00 3.70
71926 109 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=2, expected range: -1.39 1.07