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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

Delayed cut-off 4DVAR at 2018-07-16 00:00

airs
AQUA AIRS 1852 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: 0.08 0.20
gpsro
All COSMIC-6 setting RO bending angles Missing
amdar
EQRHKRJA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.00 1.18
4FSJFLBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.19
R40KEVBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.02 1.25
EU0624 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.83
EU0637 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.00
IBYWUURA 146 Temperature (k) 70000 101325 : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
In-Situ measurements
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 70 0 0 Missing
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 88 0 0 Missing
All European Wind Profiler Wind Vector difference (m/s) 01 0 40000 Missing
All TEMP SHIP Report Temperature (k) North America 0 40000 Missing
All TEMP SHIP Report Temperature (k) North America 40000 70000 Missing
All TEMP SHIP Report Temperature (k) North America 70000 101325 Missing
TEMP Land Report Temperature (k) WMO BLOCK 78 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.83 1.57
SYNOP Surface pressure (Pa) WMO BLOCK 98 0 0 : OutOfRange
Considerably: count(*)=212, expected range: 157.00 198.00
BUOYS
4401805 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=246, expected range: 0.00 135.00
4601592 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
metar
SBSJ METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=173, expected range: 0.00 111.00
SBBU METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=243, expected range: 0.00 105.00
pilot
43311 PILOT Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=11, expected range: 1.23 7.80
Severely: rms(fg_depar)=13, expected range: 1.24 9.20
ship
9VKQ2 SHIP Report Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=80, expected range: 0.00 50.00
WMKA SHIP Report Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=95, expected range: 0.00 50.00
VRBJ9 SHIP Report Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
AWUU SHIP Report Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=60, expected range: 0.00 50.00
synop
35167 Land Automatic Report RH2m (%s) : OutOfRange
9 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=70, expected range: 0.00 50.00
68549 Land Automatic Report Surface pressure (Pa) : OutOfRange
9 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=67, expected range: 0.00 50.00
48935 170 Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=66, expected range: 0.00 50.00
08275 170 Surface pressure (Pa) : OutOfRange
10 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=67, expected range: 0.00 50.00
08271 170 Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
Radiosondes
78397 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=7, expected range: 0.00 2.80
60390 TEMP Land Report Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=6, expected range: 0.00 3.90