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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-03-11 12:00

airs
AQUA AIRS 310 radiances : OutOfRange
9 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
amdar
EU0166 146 Temperature (k) 40000 70000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
Atmospheric Motion Vector
Himawari-8 cloudy WV2 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=13338, expected range: 14500.00 23000.00
In-Situ measurements
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 25 0 0 Missing
SYNOP Surface pressure (Pa) WMO BLOCK 41 0 0 : OutOfRange
Slightly: count(*)=208, expected range: 230.00 340.00
SYNOP Surface pressure (Pa) WMO BLOCK 78 0 0 : OutOfRange
Slightly: rms(fg_depar)=122, expected range: 23.00 108.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 58 0 0 : OutOfRange
Slightly: count(*)=50, expected range: -10.10 43.00
TEMP Land Report Temperature (k) WMO BLOCK 78 0 40000 : OutOfRange
Slightly: rms(fg_depar)=1, expected range: 0.78 1.81
TEMP Land Report Wind Vector difference (m/s) WMO BLOCK 11 0 40000 : OutOfRange
Slightly: rms(fg_depar)=5, expected range: 1.76 5.00
BUOYS
3100863 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=117, expected range: 0.00 78.00
5500938 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=190, expected range: 0.00 115.00
5401580 189 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 70.00
4100597 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
5401589 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
metar
ENLA METAR Surface pressure (Pa) : OutOfRange
13 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=63, expected range: 0.00 50.00
EQYB METAR Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=146, expected range: 0.00 76.00
EHJA METAR Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=73, expected range: 0.00 70.00
ship
CFN3031 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
6 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=82, expected range: 0.00 50.00
MERFR03 182 Wind Vector difference (m/s) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=50, expected range: 0.00 50.00
VRWL4 SHIP Report Wind Vector difference (m/s) : OutOfRange
15 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=90, expected range: 0.00 50.00
SBPQ Automatic SHIP Report Surface pressure (Pa) : OutOfRange
13 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=67, expected range: 0.00 50.00
46006 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Severely: avg(fg_depar)=11, expected range: -2.10 5.80
Severely: rms(fg_depar)=13, expected range: 0.00 6.30
41049 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Severely: rms(fg_depar)=8, expected range: 0.00 4.80
46185 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
BATEU07 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=77, expected range: 0.00 70.00
VRRB6 SHIP Report Surface pressure (Pa) : OutOfRange
5 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
VRXL8 SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
synop
40942 SYNOP Surface pressure (Pa) : OutOfRange
11 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
76773 SYNOP Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=60, expected range: 0.00 50.00
04158 170 Surface pressure (Pa) : OutOfRange
17 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=90, expected range: 0.00 50.00
08345 170 Surface pressure (Pa) : OutOfRange
8 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
01329 170 Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
Radiosondes
78970 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=6, expected range: 0.00 3.20
30965 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.60