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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-04-08 12:00

airs
AQUA AIRS 227 radiances : OutOfRange
14 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
cris
NPP CrIS 54 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.10 0.12
NPP CrIS 614 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.19 -0.14
Geostationary CSR
METEOSAT-8 55 2 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=1, expected range: 0.89 1.57
METEOSAT-8 55 3 radiances : OutOfRange
Slightly: stdev(fg_depar)=1, expected range: 0.64 1.20
mhs
NOAA-18 MHS 3 allsky radiances : OutOfRange
5 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.31 0.54
Ozone
METOP-B GOME-2 layer ozone, top pressure 1 : OutOfRange
5 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
7 times in the last 10 days for at least one item
Considerably: stdev_fg_depar_du=6, expected range: 2.40 5.96
ssmis
DMSP-18 SSMIS 7 allsky radiances : OutOfRange
7 times in the last 10 days for at least one item
Slightly: avg(biascorr)=5, expected range: 5.81 6.50
airep
NAX7021 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=15, expected range: -2.10 9.20
BAW189 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=17, expected range: 0.00 11.60
amdar
EU5787 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.26 1.30
5B5F5EBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
RGFKCYBA 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
4MVHHLRA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
AS3UMSZA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, 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 Land Automatic Report Surface pressure (Pa) WMO BLOCK 62 0 0 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 73 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 73 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 73 70000 101325 Missing
SYNOP Surface pressure (Pa) WMO BLOCK 41 0 0 : OutOfRange
Considerably: count(*)=150, expected range: 210.00 350.00
SYNOP Surface pressure (Pa) 01 0 0 : OutOfRange
Slightly: count(*)=1685, expected range: 1700.00 1950.00
SYNOP Surface pressure (Pa) 06 0 0 : OutOfRange
Slightly: count(*)=2565, expected range: 2600.00 2800.00
TEMP SHIP Report Temperature (k) North Atlantic 40000 70000 : OutOfRange
Slightly: rms(fg_depar)=1, expected range: 0.00 1.48
BUOYS
1300871 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=248, expected range: 0.00 117.00
4601654 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=168, expected range: 0.00 84.00
4400765 189 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
3300696 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
5401597 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
metar
KDYA METAR Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=842, expected range: -210.00 230.00
Severely: rms(fg_depar)=850, expected range: 0.00 240.00
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
KUIL METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=163, expected range: 0.00 99.00
LMML METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=204, expected range: 0.00 109.00
ship
ZCDI4 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)=54, expected range: 0.00 50.00
WDJ7294 SHIP Report Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=83, expected range: 0.00 50.00
VRKE9 SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
SPREP Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
ZCDI4 SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=88, expected range: 0.00 70.00
42059 Automatic SHIP Report 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
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
94866 170 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=416, expected range: 0.00 110.00
12550 170 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
13625 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
71595 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
06799 170 Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=72, expected range: 0.00 70.00
Radiosondes
72645 109 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=8, expected range: 0.29 5.70
Severely: rms(fg_depar)=9, expected range: 0.47 6.40
22845 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=16, expected range: 0.00 9.90
31510 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=7, expected range: 0.00 3.50
04220 109 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.42 1.39
72645 109 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=-1, expected range: -0.66 1.20
Severely: rms(fg_depar)=4, expected range: 0.17 2.10
72645 109 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-2, expected range: -1.17 1.55
Severely: rms(fg_depar)=2, expected range: 0.00 1.61
71945 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
72376 109 Q (g/kg) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
29839 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
29839 TEMP Land Report Temperature (k) 70000 101325 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00