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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-04-11 12:00

airs
AQUA AIRS 227 radiances : OutOfRange
20 times in the last 10 days for at least one item
Severely: avg(biascorr)=0, expected range: -0.57 -0.54
AQUA AIRS 216 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.85 -0.75
AQUA AIRS 1111 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=0, expected range: 0.31 0.49
Slightly: count(*)=73, expected range: 1243.00 6925.00
Geostationary CSR
METEOSAT-8 55 2 radiances : OutOfRange
4 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
1 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=1, expected range: 0.63 1.20
mhs
METOP-B MHS 3 allsky radiances : OutOfRange
4 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.38 0.60
NOAA-18 MHS 3 allsky radiances : OutOfRange
11 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.32 0.54
Ozone
METOP-B GOME-2 layer ozone, top pressure 1 : OutOfRange
8 times in the last 10 days for at least one item
Slightly: stdev_fg_depar_du=5, expected range: 5.20 5.83
NOAA-19 SBUV layer ozone, top pressure 10130 : OutOfRange
10 times in the last 10 days for at least one item
Slightly: avg_fg_depar_du=2, expected range: -0.74 2.37
Slightly: stdev_fg_depar_du=6, expected range: 2.30 5.96
NOAA-19 SBUV layer ozone, top pressure 63940 : OutOfRange
13 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
12 times in the last 10 days for at least one item
Severely: avg(biascorr)=5, expected range: 5.81 6.30
DMSP-17 SSMIS 1 allsky radiances : OutOfRange
Slightly: count(*)=6834, expected range: 7700.00 14800.00
DMSP-17 SSMIS 2 allsky radiances : OutOfRange
Slightly: count(*)=2589, expected range: 2600.00 6600.00
DMSP-17 SSMIS 3 allsky radiances : OutOfRange
Slightly: count(*)=2971, expected range: 3300.00 7100.00
DMSP-17 SSMIS 5 allsky radiances : OutOfRange
Slightly: count(*)=15337, expected range: 18400.00 36000.00
DMSP-17 SSMIS 6 allsky radiances : OutOfRange
Slightly: count(*)=15337, expected range: 18400.00 36000.00
DMSP-17 SSMIS 7 allsky radiances : OutOfRange
Slightly: count(*)=15337, expected range: 18400.00 36000.00
DMSP-17 SSMIS 8 allsky radiances : OutOfRange
Slightly: count(*)=10481, expected range: 12000.00 24000.00
DMSP-17 SSMIS 9 allsky radiances : OutOfRange
Slightly: count(*)=12242, expected range: 14200.00 28000.00
DMSP-17 SSMIS 10 allsky radiances : OutOfRange
Slightly: count(*)=18089, expected range: 21000.00 43000.00
DMSP-17 SSMIS 11 allsky radiances : OutOfRange
Slightly: count(*)=18929, expected range: 22000.00 45000.00
DMSP-17 SSMIS 12 allsky radiances : OutOfRange
Slightly: count(*)=10616, expected range: 12200.00 24000.00
DMSP-17 SSMIS 13 allsky radiances : OutOfRange
Slightly: count(*)=10616, expected range: 12200.00 24000.00
DMSP-17 SSMIS 14 allsky radiances : OutOfRange
Slightly: count(*)=10488, expected range: 12100.00 24000.00
DMSP-17 SSMIS 15 allsky radiances : OutOfRange
Slightly: count(*)=10416, expected range: 12000.00 23000.00
DMSP-17 SSMIS 16 allsky radiances : OutOfRange
Slightly: count(*)=10540, expected range: 12100.00 24000.00
DMSP-17 SSMIS 17 allsky radiances : OutOfRange
Slightly: count(*)=10459, expected range: 12100.00 24000.00
DMSP-17 SSMIS 18 allsky radiances : OutOfRange
Slightly: count(*)=10508, expected range: 12100.00 24000.00
airep
LOT26 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
NRS7096 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
amdar
EU6621 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=9, expected range: -0.94 5.70
Severely: rms(fg_depar)=11, expected range: 0.00 5.90
ACOEISZA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=11, expected range: 0.00 7.50
PORENXBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.02 1.15
EU0460 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.63
EU6621 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.10
EU1863 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.30
EU1726 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.48
D4T1QCBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
4VJJ0LBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
XYJYJ5JA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
JR2XLNJA 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
In-Situ measurements
SYNOP Surface pressure (Pa) WMO BLOCK 93 0 0 : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=24, expected range: 154.00 174.00
Land Automatic Report Surface pressure (Pa) WMO BLOCK 47 0 0 : OutOfRange
Severely: count(*)=387, expected range: 1540.00 1960.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 72 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=68, expected range: 40.00 55.00
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 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
TEMP Land Report Temperature (k) WMO BLOCK 94 70000 101325 : OutOfRange
Slightly: rms(fg_depar)=1, expected range: 0.47 1.33
TEMP Land Report Temperature (k) WMO BLOCK 97 0 40000 : OutOfRange
Slightly: avg(fg_depar)=0, expected range: -0.15 0.73
BUOYS
5401541 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=279, expected range: 0.00 108.00
4101561 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=111, expected range: 0.00 73.00
2101583 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=132, expected range: 0.00 78.00
5400955 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=214, expected range: 0.00 128.00
5501518 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=-231, expected range: -67.00 73.00
Severely: rms(fg_depar)=297, expected range: 0.00 62.00
4101539 189 Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=230, expected range: -63.00 118.00
Severely: rms(fg_depar)=292, expected range: 0.00 95.00
5401596 189 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
7101508 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
metar
LTAO METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=427, expected range: 0.00 167.00
ENLA METAR 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
ship
46004 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=60, expected range: 0.00 50.00
A8HY8 SHIP Report Wind Vector difference (m/s) : OutOfRange
Severely_persistent: freq(qc_pge)=60, expected range: 0.00 50.00
VRGO3 SHIP Report Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=65, expected range: 0.00 50.00
VRWN7 SHIP Report Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=90, expected range: 0.00 50.00
42059 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
9 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=52, expected range: 0.00 50.00
41048 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Severely: avg(fg_depar)=10, expected range: -1.41 5.00
Severely: rms(fg_depar)=13, expected range: 0.00 5.80
41048 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=230, expected range: 0.00 118.00
46204 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
V7AE7 SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
PCHM SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
synop
76519 SYNOP Surface pressure (Pa) : OutOfRange
2 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
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=-280, expected range: -115.00 120.00
Severely: rms(fg_depar)=457, expected range: 0.00 220.00
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
08345 170 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=90, 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)=75, expected range: 0.00 70.00
37308 Land Automatic Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
Radiosondes
72305 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=8, expected range: 1.00 6.20
Severely: rms(fg_depar)=11, expected range: 0.75 7.40
94975 109 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=-3, expected range: -0.73 1.07
01028 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00