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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-03-05 12:00

airs
AQUA AIRS 310 radiances : OutOfRange
2 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.82 -0.75
amdar
EU0870 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=7, expected range: 0.84 5.30
Severely: rms(fg_depar)=9, expected range: 1.10 5.90
AG1003 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=9, expected range: 1.55 6.30
Severely: rms(fg_depar)=10, expected range: 1.53 7.30
G3FKNZJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=12, expected range: 0.00 7.90
MZNFR1RA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=11, expected range: -0.88 6.50
Severely: rms(fg_depar)=14, expected range: 0.00 7.40
IIJBYGJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=70, expected range: 0.00 70.00
SJKRTPRA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=73, expected range: 0.00 70.00
In-Situ measurements
Land Automatic Report Surface pressure (Pa) WMO BLOCK 81 0 0 : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=5, expected range: 6.00 6.10
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 58 0 0 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 80 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 82 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 83 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 82 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 82 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 82 70000 101325 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 83 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 83 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 83 70000 101325 Missing
SYNOP Surface pressure (Pa) WMO BLOCK 34 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(fg_depar)=-36, expected range: -33.00 98.00
Moored Buoy Surface pressure (Pa) WMO BLOCK 31 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=14, expected range: 17.10 36.00
TEMP Land Report Temperature (k) WMO BLOCK 80 0 40000 : OutOfRange
Slightly: count(*)=6, expected range: 27.00 320.00
TEMP Land Report Temperature (k) WMO BLOCK 80 40000 70000 : OutOfRange
Slightly: count(*)=2, expected range: 13.10 113.00
BUOYS
4802009 189 Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=75, expected range: 0.00 50.00
5601501 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=367, expected range: 0.00 107.00
5401554 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=96, expected range: 1.91 63.00
2301536 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=142, expected range: 0.00 92.00
2301556 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=356, expected range: 0.00 230.00
2200184 Moored Buoy Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
1400567 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=91, 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)=60, expected range: 0.00 50.00
KGRF METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=325, expected range: 0.00 118.00
ship
D5DS3 SHIP Report Wind Vector difference (m/s) : OutOfRange
4 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=52, expected range: 0.00 50.00
VRWL4 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)=86, expected range: 0.00 50.00
VTWS 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)=51, expected range: 0.00 50.00
VRID6 SHIP Report Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=60, expected range: 0.00 50.00
44025 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
2 times in the last 10 days for at least one item
Severely: avg(fg_depar)=18, expected range: -1.39 5.80
Severely: rms(fg_depar)=18, expected range: 0.00 6.40
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
CFL24 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
5 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
C6YA5 SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
VRRB6 SHIP Report 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 70.00
synop
08271 170 Surface pressure (Pa) : OutOfRange
10 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=52, expected range: 0.00 50.00
08345 170 Surface pressure (Pa) : OutOfRange
11 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=57, expected range: 0.00 50.00
04158 170 Surface pressure (Pa) : OutOfRange
15 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=85, expected range: 0.00 50.00
14253 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
47189 Land Automatic Report 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 70.00
Radiosondes
76595 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=9, expected range: 0.57 6.00