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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-04-16 12:00

airs
AQUA AIRS 78 radiances : OutOfRange
Slightly: avg(biascorr)=-1, expected range: -1.24 -0.86
cris
NPP CrIS 598 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: 0.11 0.17
gpsro
All TERRA-SAR-X setting RO bending angles Missing
All TANDEM-X rising RO bending angles Missing
All COSMIC-6 rising RO bending angles Missing
iasi
METOP-A IASI 5455 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.39 0.48
mhs
METOP-B MHS 3 allsky radiances : OutOfRange
12 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.42 0.60
NOAA-18 MHS 3 allsky radiances : OutOfRange
19 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.35 0.54
Ozone
NOAA-19 SBUV layer ozone, top pressure 63940 : OutOfRange
17 times in the last 10 days for at least one item
Considerably: stdev_fg_depar_du=2, expected range: 1.47 2.27
NOAA-19 SBUV layer ozone, top pressure 25430 : OutOfRange
2 times in the last 10 days for at least one item
Slightly: stdev_fg_depar_du=4, expected range: 1.88 4.47
ssmis
DMSP-18 SSMIS 7 allsky radiances : OutOfRange
19 times in the last 10 days for at least one item
Severely: avg(biascorr)=5, expected range: 5.81 6.20
DMSP-18 SSMIS 11 allsky radiances : OutOfRange
7 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.13 0.04
airep
NRS7093 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
UAL984 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
amdar
EU1085 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.06 1.12
D1WEOHBA 146 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
WIKVGCBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-1, expected range: -0.71 0.84
EU6634 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.87
CR4UOFZA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=-3, expected range: -1.59 1.36
Severely: rms(fg_depar)=4, expected range: 0.00 2.50
AOBZJZBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=73, expected range: 0.00 70.00
DIJX1DJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=88, expected range: 0.00 70.00
ZTEIN5RA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
X2X02LZA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=78, expected range: 0.00 70.00
In-Situ measurements
All SYNOP Surface pressure (Pa) WMO BLOCK 92 0 0 Missing
All European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 11 0 400 Missing
All Moored Buoy Surface pressure (Pa) WMO BLOCK 28 0 0 Missing
Japanese Wind Profiler Wind Vector difference (m/s) WMO BLOCK 47 0 400 : OutOfRange
3 times in the last 10 days for at least one item
Slightly: count(*)=1094, expected range: -770.00 1050.00
AIREP Wind Vector difference (m/s) Asia 0 40000 : OutOfRange
Slightly: count(*)=271, expected range: 290.00 750.00
AIREP Wind Vector difference (m/s) Indian Ocean 0 40000 : OutOfRange
Slightly: count(*)=245, expected range: 280.00 730.00
AMDAR Temperature (k) North Atlantic 40000 70000 : OutOfRange
Slightly: rms(fg_depar)=1, expected range: 0.41 0.93
BUOYS
4401554 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=245, expected range: 0.00 152.00
3301530 189 Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=76, expected range: 0.00 70.00
1501513 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
5401623 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
metar
TRPG METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=260, expected range: 0.00 135.00
SVMI METAR Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
ship
46004 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
7 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=66, expected range: 0.00 50.00
VTFG 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
46100 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)=91, expected range: 0.00 70.00
ZCDI4 SHIP Report Wind Vector difference (m/s) : OutOfRange
7 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
9HA3667 SHIP Report Wind Vector difference (m/s) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
ZMCT Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
synop
40942 SYNOP Surface pressure (Pa) : OutOfRange
19 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
60230 Land Automatic Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
93831 170 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
85141 SYNOP Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, 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
91765 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.70
74389 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
42369 TEMP Land Report Temperature (k) 70000 101325 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
FHM5UJH 111 Temperature (k) 70000 101325 : OutOfRange
Considerably: freq(qc_pge)=77, expected range: 0.00 70.00