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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-04-10 12:00

airs
AQUA AIRS 227 radiances : OutOfRange
18 times in the last 10 days for at least one item
Severely: avg(biascorr)=0, expected range: -0.57 -0.54
AQUA AIRS 1111 radiances : DataMissing
AQUA AIRS 77 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.48 0.57
AQUA AIRS 78 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.48 0.55
Geostationary CSR
METEOSAT-8 55 2 radiances : OutOfRange
3 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=1, expected range: 0.88 1.57
iasi
METOP-B IASI 95 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=0, expected range: 0.27 0.38
mhs
NOAA-18 MHS 3 allsky radiances : OutOfRange
9 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.32 0.54
METOP-A MHS 3 allsky radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: 0.39 0.62
METOP-B MHS 3 allsky radiances : OutOfRange
3 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.37 0.60
Ozone
METOP-B GOME-2 layer ozone, top pressure 1 : OutOfRange
7 times in the last 10 days for at least one item
Severely: stdev_fg_depar_du=6, expected range: 5.30 5.83
NOAA-19 SBUV layer ozone, top pressure 10130 : OutOfRange
9 times in the last 10 days for at least one item
Considerably: stdev_fg_depar_du=7, expected range: 2.30 5.96
NOAA-19 SBUV layer ozone, top pressure 63940 : OutOfRange
11 times in the last 10 days for at least one item
Slightly: stdev_fg_depar_du=2, expected range: 1.08 2.27
ssmis
DMSP-18 SSMIS 7 allsky radiances : OutOfRange
11 times in the last 10 days for at least one item
Considerably: avg(biascorr)=5, expected range: 5.81 6.40
amdar
Q4OSPIBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=10, expected range: 0.83 6.50
EU8527 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-2, expected range: -1.26 1.07
Severely: rms(fg_depar)=3, expected range: 0.00 1.29
DVXITKRA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.09 1.26
UZXFGAZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-1, expected range: -0.56 0.53
EU0845 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.55
EU8527 146 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=-4, expected range: -1.59 1.50
Severely: rms(fg_depar)=4, expected range: 0.00 1.88
EU8527 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
MDJTXKRA 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)=100, expected range: 0.00 70.00
In-Situ measurements
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 62 0 0 Missing
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 TEMP Land Report Temperature (k) WMO BLOCK 97 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 97 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 97 70000 101325 Missing
All AIREP Wind Vector difference (m/s) Asia 40000 70000 Missing
All AIREP Wind Vector difference (m/s) Asia 70000 101325 Missing
All AIREP Wind Vector difference (m/s) Indian Ocean 40000 70000 Missing
All AIREP Wind Vector difference (m/s) Indian Ocean 70000 101325 Missing
Moored Buoy Surface pressure (Pa) WMO BLOCK 48 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=9, expected range: 12.00 12.10
SYNOP Surface pressure (Pa) WMO BLOCK 22 0 0 : OutOfRange
Slightly: avg(fg_depar)=92, expected range: -64.00 83.00
Slightly: rms(fg_depar)=108, expected range: 2.10 92.00
PILOT Wind Vector difference (m/s) WMO BLOCK 80 0 40000 : OutOfRange
Slightly: count(*)=28, expected range: 51.00 280.00
TEMP Land Report Temperature (k) 04 40000 70000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: rms(fg_depar)=1, expected range: 0.16 1.18
BUOYS
1701523 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=180, expected range: 0.00 116.00
1600516 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=187, expected range: 0.00 125.00
5500086 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=124, expected range: 0.00 59.00
1400567 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=207, expected range: 0.00 130.00
4400765 189 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
5401596 189 Surface pressure (Pa) : OutOfRange
6 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
3300696 189 Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
metar
KT65 METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=165, expected range: 0.00 105.00
KOBE METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=167, expected range: 0.00 87.00
KSEF METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=179, expected range: 0.00 104.00
DTTG METAR Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=765, expected range: -189.00 187.00
Severely: rms(fg_depar)=771, expected range: 0.00 167.00
LIBH METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=292, expected range: 0.00 191.00
ENLA METAR 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
ship
46004 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Severely_persistent: freq(qc_pge)=55, expected range: 0.00 50.00
TBWUK86 SHIP Report Wind Vector difference (m/s) : OutOfRange
Severely_persistent: freq(qc_pge)=60, expected range: 0.00 50.00
ZCDI4 SHIP Report Wind Vector difference (m/s) : OutOfRange
8 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=60, expected range: 0.00 50.00
MERFR03 182 Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
62132 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
VOLG Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
42365 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=91, expected range: 0.00 70.00
PHET SHIP Report Wind Vector difference (m/s) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=88, 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
89646 Land Automatic Report Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=81, expected range: 0.00 70.00
38836 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
71882 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
71506 170 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
Radiosondes
08579 109 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.07 0.68
04270 109 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
42701 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=8, expected range: 0.14 3.60