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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2019-02-21 12:00

amdar
LIEGUUBA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.55
J0I0GCJA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.90
VE0GUUZA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.61
QPAUNWJA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-2, expected range: -1.23 0.91
Severely: rms(fg_depar)=3, expected range: 0.00 1.54
D41YB4ZA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.30
Atmospheric Motion Vector
All GOES-16 IR1 0 40000 Missing
METEOSAT-11 IR3 40000 70000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=5, expected range: 1.85 5.40
In-Situ measurements
All PILOT Wind Vector difference (m/s) WMO BLOCK 61 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 94 0 40000 Missing
All European Wind Profiler Wind Vector difference (m/s) 02 0 40000 Missing
TEMP Land Report Temperature (k) WMO BLOCK 56 0 40000 : OutOfRange
Severely: count(*)=47, expected range: 98.00 196.00
TEMP Land Report Q (g/kg) 04 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
All TEMP Land Report Temperature (k) WMO BLOCK 56 70000 101325 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 63 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 63 40000 70000 Missing
All TEMP Land Report Q (g/kg) WMO BLOCK 27 0 40000 Missing
TEMP Land Report Temperature (k) WMO BLOCK 56 40000 70000 : OutOfRange
Considerably: count(*)=6, expected range: 14.00 42.00
Land Automatic Report Surface pressure (Pa) WMO BLOCK 45 0 0 : OutOfRange
Slightly: count(*)=25, expected range: 26.00 27.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 65 0 0 : OutOfRange
5 times in the last 10 days for at least one item
Slightly: count(*)=5, expected range: 6.60 16.90
TEMP Land Report Temperature (k) WMO BLOCK 58 70000 101325 : OutOfRange
Slightly: count(*)=29, expected range: 30.00 64.00
TEMP Land Report Q (g/kg) WMO BLOCK 56 0 40000 : OutOfRange
Slightly: count(*)=6, expected range: 8.60 29.00
BUOYS
6401505 189 Surface pressure (Pa) : OutOfRange
8 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=53, expected range: 0.00 50.00
4401551 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 75.00
7401502 189 Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
2301506 189 Surface pressure (Pa) : OutOfRange
9 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
ship
V7DR9 SHIP Report Surface pressure (Pa) : OutOfRange
27 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=82, expected range: 0.00 50.00
VRYO9 SHIP Report Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=95, expected range: 0.00 50.00
9V3867 SHIP Report Wind Vector difference (m/s) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
synop
10281 170 Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=93, expected range: 0.00 50.00
17204 SYNOP 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
04166 170 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
Radiosondes
91212 109 Q (g/kg) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
06011 109 Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
80001 TEMP Land Report Q (g/kg) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
87623 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
71081 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.38 1.44
04339 109 Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
93417 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00