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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-11-20 18:00

gpsro
All COSMIC-6 setting RO bending angles Missing
iasi
METOP-A IASI 5403 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: 0.25 0.30
METOP-A IASI 5405 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: 0.20 0.25
amdar
401STNZA 146 Temperature (k) 0 40000 : OutOfRange
12 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=77, expected range: 0.00 50.00
AFZA05 AMDAR Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=12, expected range: 0.02 6.90
Severely: rms(fg_depar)=13, expected range: 0.00 8.10
YNQGXFRA 146 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=1, expected range: -0.69 0.55
YNQGXFRA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.42
EU0410 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.75
In-Situ measurements
All Land Automatic Report Surface pressure (Pa) 02 0 0 Missing
All Land Automatic Report RH2m (%s) 06 70000 101325 Missing
All Land Automatic Report RH2m (%s) WMO BLOCK 11 70000 101325 Missing
All Land Automatic Report RH2m (%s) WMO BLOCK 12 70000 101325 Missing
All SYNOP RH2m (%s) 01 70000 101325 Missing
All SYNOP RH2m (%s) WMO BLOCK 10 70000 101325 Missing
All SYNOP RH2m (%s) WMO BLOCK 11 70000 101325 Missing
All SYNOP RH2m (%s) WMO BLOCK 14 70000 101325 Missing
All SYNOP RH2m (%s) WMO BLOCK 25 70000 101325 Missing
All SYNOP RH2m (%s) WMO BLOCK 70 70000 101325 Missing
Drifter Buoy Surface pressure (Pa) WMO BLOCK 73 0 0 : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=11, expected range: 5.10 6.80
All PILOT Wind Vector difference (m/s) WMO BLOCK 71 0 40000 Missing
All European Wind Profiler Wind Vector difference (m/s) 01 0 40000 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
BUOYS
0022952 189 Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
7401506 189 Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
ship
LF3I 182 Wind Vector difference (m/s) : OutOfRange
33 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=88, expected range: 0.00 50.00
62132 Automatic 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
41063 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
14 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
synop
76040 SYNOP RH2m (%s) : OutOfRange
Severely_persistent: freq(qc_pge)=51, expected range: 0.00 50.00
04214 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00