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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-04-13 00:00

airs
AQUA AIRS 1111 radiances : DataMissing
AQUA AIRS 77 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=0, expected range: 0.47 0.59
AQUA AIRS 78 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=0, expected range: 0.47 0.57
AQUA AIRS 79 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.50 0.56
Geostationary CSR
METEOSAT-8 55 8 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.32 0.69
gpsro
All COSMIC-1 setting RO bending angles Missing
All COSMIC-1 rising RO bending angles Missing
iasi
METOP-B IASI 5403 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.21 0.29
METOP-B IASI 5405 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.16 0.23
METOP-B IASI 5455 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.37 0.46
METOP-B IASI 5502 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: 0.79 0.92
mhs
NOAA-18 MHS 3 allsky radiances : OutOfRange
13 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.32 0.54
Ozone
NOAA-19 SBUV layer ozone, top pressure 63940 : OutOfRange
14 times in the last 10 days for at least one item
Slightly: stdev_fg_depar_du=2, expected range: 1.07 2.27
ssmis
DMSP-18 SSMIS 7 allsky radiances : OutOfRange
15 times in the last 10 days for at least one item
Slightly: avg(biascorr)=5, expected range: 5.81 6.30
DMSP-18 SSMIS 11 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.13 0.04
airep
ETH502 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=85, expected range: 0.00 70.00
ACA864 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
ACA85 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
BAW1YC AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
amdar
ELG2MKRA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.41
EU0840 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.20
EU1008 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-3, expected range: -1.02 1.09
Severely: rms(fg_depar)=3, expected range: 0.00 1.35
EU1008 146 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=-3, expected range: -1.27 1.84
Severely: rms(fg_depar)=3, expected range: 0.00 2.30
EU0819 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.84
YAT13TBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
VQHJNZJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
3 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 SYNOP Surface pressure (Pa) WMO BLOCK 92 0 0 Missing
All AIREP Wind Vector difference (m/s) Asia 70000 101325 Missing
All AIREP Wind Vector difference (m/s) Indian Ocean 70000 101325 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 70 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 71 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 38 40000 70000 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 63 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 63 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 63 70000 101325 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 65 70000 101325 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 88 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 88 70000 101325 Missing
Land Automatic Report Surface pressure (Pa) 06 0 0 : OutOfRange
2 times in the last 10 days for at least one item
Considerably: count(*)=86, expected range: -9.90 61.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 72 0 0 : OutOfRange
4 times in the last 10 days for at least one item
Considerably: count(*)=82, expected range: 28.00 68.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 64 0 0 : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=213, expected range: 172.00 210.00
Moored Buoy Surface pressure (Pa) WMO BLOCK 28 0 0 : OutOfRange
4 times in the last 10 days for at least one item
Slightly: count(*)=3, expected range: 3.90 18.70
BUOYS
1601571 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=229, expected range: 0.00 141.00
2301503 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=237, expected range: 0.00 155.00
2301565 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=-371, expected range: -153.00 139.00
Severely: rms(fg_depar)=372, expected range: 0.00 130.00
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
metar
ENLA METAR Surface pressure (Pa) : OutOfRange
6 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
5 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=74, expected range: 0.00 50.00
46206 Automatic 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)=55, expected range: 0.00 50.00
9HA3553 SHIP Report Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=78, expected range: 0.00 50.00
MERFR03 182 Wind Vector difference (m/s) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
SPREP 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)=100, expected range: 0.00 70.00
C6TH9 SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
VTFG Automatic SHIP Report Surface pressure (Pa) : OutOfRange
8 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
86221 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
08345 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
47946 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=72, expected range: 0.00 70.00
Radiosondes
43285 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=12, expected range: 2.10 6.60
Severely: rms(fg_depar)=13, expected range: 2.40 7.60
11035 109 Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
43185 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=8, expected range: 0.00 4.00
71043 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
01028 109 Q (g/kg) 40000 70000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
98618 TEMP Land Report Temperature (k) 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