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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-02-06 12:00

airs
AQUA AIRS 105 radiances : OutOfRange
Slightly: avg(fg_depar)=0, expected range: -0.02 0.06
AQUA AIRS 950 radiances : OutOfRange
Slightly: avg(fg_depar)=0, expected range: -0.05 0.04
AQUA AIRS 1069 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.22 -0.16
AQUA AIRS 1095 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(fg_depar)=0, expected range: -0.07 0.04
AQUA AIRS 1130 radiances : OutOfRange
Slightly: avg(fg_depar)=0, expected range: -0.07 0.03
AQUA AIRS 1266 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.45 0.61
AQUA AIRS 1415 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.38 -0.28
AQUA AIRS 1455 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=0, expected range: 0.56 0.78
AQUA AIRS 1477 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=0, expected range: 0.56 0.78
AQUA AIRS 1500 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.61 0.89
AQUA AIRS 1519 radiances : OutOfRange
Slightly: stdev(fg_depar)=1, expected range: 0.74 1.09
AQUA AIRS 1545 radiances : OutOfRange
Slightly: stdev(fg_depar)=1, expected range: 0.68 1.01
90 AQUA AIRS 74 radiances have reduced counts (see example): OutOfRange
Slightly: count(*)=10357, expected range: 11700.00 26000.00
gpsro
All COSMIC-6 rising RO bending angles Missing
amdar
AU0169 AMDAR Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=5, expected range: 1.45 4.40
0TSHLKBA 146 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=1, expected range: -0.34 0.84
DDO0RPRA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.40
CHHEOFZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.17 0.30
Q1ICSJBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=78, expected range: 0.00 70.00
DMHLNOJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
IYFLFXRA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=73, expected range: 0.00 70.00
Atmospheric Motion Vector
All AQUA cloudy WV 0 40000 Missing
AQUA IR 70000 110000 : OutOfRange
Slightly: count(*)=1, expected range: 2.00 56.00
GOES-15 VIS1 70000 110000 : OutOfRange
Slightly: count(*)=587, expected range: 900.00 3800.00
In-Situ measurements
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 42 0 0 Missing
All European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 95 0 400 Missing
TEMP Land Report Temperature (k) WMO BLOCK 13 70000 101325 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=166, expected range: 62.00 123.00
TEMP Land Report Temperature (k) WMO BLOCK 13 40000 70000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=172, expected range: 81.00 107.00
TEMP Land Report Temperature (k) WMO BLOCK 13 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=333, expected range: 135.00 250.00
TEMP Land Report Temperature (k) WMO BLOCK 12 40000 70000 : OutOfRange
Severely: count(*)=281, expected range: 350.00 390.00
TEMP Land Report Temperature (k) WMO BLOCK 98 40000 70000 : OutOfRange
Considerably: rms(fg_depar)=2, expected range: 0.00 1.96
Considerably: avg(fg_depar)=-1, expected range: -0.76 0.87
TEMP Land Report Temperature (k) WMO BLOCK 23 0 40000 : OutOfRange
Considerably: rms(fg_depar)=5, expected range: 0.31 4.00
Slightly: avg(fg_depar)=-2, expected range: -2.10 1.33
TEMP Land Report Wind Vector difference (m/s) WMO BLOCK 71 0 40000 : OutOfRange
Slightly: count(*)=1138, expected range: 1160.00 1800.00
TEMP Land Report Temperature (k) WMO BLOCK 65 0 40000 : OutOfRange
Slightly: rms(fg_depar)=2, expected range: 0.67 2.40
TEMP Land Report Temperature (k) WMO BLOCK 12 70000 101325 : OutOfRange
Slightly: count(*)=305, expected range: 310.00 430.00
BUOYS
5401589 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=288, expected range: 0.00 172.00
3300519 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=207, expected range: 0.00 96.00
Severely: avg(fg_depar)=-195, expected range: -103.00 66.00
4401633 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=334, expected range: 0.00 149.00
4700546 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
1501512 189 Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=85, expected range: 0.00 70.00
metar
CWRH METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=527, expected range: 0.00 350.00
MKJS METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=330, expected range: 0.00 220.00
PAHP METAR Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
ship
ZDNC6 SHIP Report Surface pressure (Pa) : OutOfRange
6 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
VRPY7 SHIP Report Surface pressure (Pa) : OutOfRange
6 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=66, expected range: 0.00 50.00
VTXF SHIP Report Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=90, expected range: 0.00 50.00
62154 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=153, expected range: 0.00 102.00
9V9040 SHIP Report Wind Vector difference (m/s) : OutOfRange
8 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
3FAD8 SHIP Report 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
CGCC Automatic SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
synop
08290 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=90, expected range: 0.00 70.00
71021 170 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
24951 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
76581 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
14544 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
Radiosondes
23078 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=9, expected range: 0.02 4.90
Severely: rms(fg_depar)=11, expected range: 0.00 5.60
28661 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=14, expected range: 0.00 4.90
68512 109 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
78762 TEMP Land Report Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
68994 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=5, expected range: 0.00 2.30
23415 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=11, expected range: 0.00 6.40
70231 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
72248 109 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-1, expected range: -0.67 1.13
Severely: rms(fg_depar)=2, expected range: 0.00 1.39
68512 109 Q (g/kg) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00