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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-03-10 00:00

airs
AQUA AIRS 310 radiances : OutOfRange
6 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.82 -0.76
AQUA AIRS 1872 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.07 0.10
AQUA AIRS 1876 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.11 -0.08
AQUA AIRS 1877 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.01 0.02
gpsro
All COSMIC-6 setting RO bending angles Missing
Ozone
NOAA-19 SBUV layer ozone, top pressure 10130 : OutOfRange
2 times in the last 10 days for at least one item
Slightly: stdev_fg_depar_du=5, expected range: 2.00 5.96
amdar
SL0075 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.30
In-Situ measurements
SYNOP Surface pressure (Pa) WMO BLOCK 91 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=211, expected range: 22.00 94.00
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 25 0 0 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 62 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 62 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 62 70000 101325 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 65 70000 101325 Missing
Moored Buoy Surface pressure (Pa) WMO BLOCK 15 0 0 : OutOfRange
3 times in the last 10 days for at least one item
Considerably: count(*)=12, expected range: 17.80 30.00
SYNOP Surface pressure (Pa) WMO BLOCK 71 0 0 : OutOfRange
Slightly: rms(fg_depar)=98, expected range: 41.00 96.00
Land Automatic Report Surface pressure (Pa) WMO BLOCK 68 0 0 : OutOfRange
3 times in the last 10 days for at least one item
Slightly: count(*)=341, expected range: 360.00 600.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 15 0 0 : OutOfRange
Slightly: rms(fg_depar)=98, expected range: 31.00 89.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 31 0 0 : OutOfRange
Slightly: count(*)=117, expected range: 47.00 111.00
TEMP Land Report Temperature (k) WMO BLOCK 89 0 40000 : OutOfRange
Slightly: avg(fg_depar)=0, expected range: -0.05 0.60
TEMP Land Report Temperature (k) WMO BLOCK 91 40000 70000 : OutOfRange
Slightly: rms(fg_depar)=1, expected range: 0.24 1.45
BUOYS
1501513 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=438, expected range: 23.00 270.00
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
3300966 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=177, expected range: 0.00 105.00
2200184 Moored Buoy Surface pressure (Pa) : OutOfRange
8 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=90, expected range: 0.00 70.00
metar
CYPD METAR Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=441, expected range: -115.00 122.00
Severely: rms(fg_depar)=529, expected range: 0.00 109.00
CYYG METAR Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=347, expected range: -140.00 182.00
Severely: rms(fg_depar)=463, expected range: 0.00 127.00
CYQM METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=221, expected range: 0.00 129.00
HKMO METAR Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=319, expected range: 0.00 151.00
CYQY METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=220, expected range: 0.00 110.00
pilot
42182 PILOT Wind Vector difference (m/s) 0 40000 : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
ship
VRWL4 SHIP Report Wind Vector difference (m/s) : OutOfRange
12 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=86, expected range: 0.00 50.00
SBPQ Automatic SHIP Report Surface pressure (Pa) : OutOfRange
10 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=51, expected range: 0.00 50.00
VOFG Automatic SHIP Report Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=452, expected range: -115.00 240.00
Severely: rms(fg_depar)=502, expected range: 0.00 210.00
46185 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)=100, expected range: 0.00 70.00
VRRB6 SHIP Report Wind Vector difference (m/s) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
CGTF Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
CFL24 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=91, expected range: 0.00 70.00
VTFG Automatic SHIP Report Surface pressure (Pa) : OutOfRange
5 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
synop
40942 SYNOP Surface pressure (Pa) : OutOfRange
8 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
86128 SYNOP Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=54, 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)=92, expected range: 0.00 50.00
91582 170 Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=-1199, expected range: -71.00 81.00
Severely: rms(fg_depar)=1202, expected range: 0.00 83.00
91592 170 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=174, expected range: 0.00 103.00
91596 170 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=253, expected range: -36.00 108.00
Severely: rms(fg_depar)=262, expected range: 0.00 105.00
91587 170 Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=359, expected range: -58.00 88.00
Severely: rms(fg_depar)=411, expected range: 0.00 81.00
15119 170 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=176, expected range: 0.00 107.00
91579 170 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=139, expected range: 0.00 76.00
21931 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
94541 170 RH2m (%s) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
68577 Land Automatic Report Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
Radiosondes
94996 109 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=6, expected range: 1.09 4.90
17351 109 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.40
89859 109 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.14 0.67
91592 109 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-2, expected range: -0.93 1.34
Severely: rms(fg_depar)=3, expected range: 0.00 1.78
24944 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.80