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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-03-08 00:00

gpsro
METOP-A rising RO bending angles 0-10 km : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=7336, expected range: 3900.00 7000.00
METOP-A rising RO bending angles 10-20 km : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=7668, expected range: 4100.00 7400.00
METOP-A rising RO bending angles 20-30 km : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=5653, expected range: 3000.00 5500.00
METOP-A rising RO bending angles 30-40 km : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=4775, expected range: 2500.00 4600.00
METOP-A rising RO bending angles 40-50 km : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=4761, expected range: 2500.00 4600.00
Ozone
NOAA-19 SBUV layer ozone, top pressure 10130 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: stdev_fg_depar_du=5, expected range: 2.60 5.50
NOAA-19 SBUV layer ozone, top pressure 63940 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: stdev_fg_depar_du=2, expected range: 0.99 1.95
ssmis
DMSP-18 SSMIS 4 allsky radiances : OutOfRange
4 times in the last 10 days for at least one item
Slightly: avg(biascorr)=-1, expected range: -1.35 -1.13
amdar
ZHTUOGBA 146 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
QB1EOFJA 146 Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
TX1UNXJA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.64
3VVJM4BA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
Atmospheric Motion Vector
GOES-15 cloudy WV3 40000 70000 : OutOfRange
Slightly: stdev(press)=0, expected range: 0.00 0.10
In-Situ measurements
All SYNOP Surface pressure (Pa) WMO BLOCK 92 0 0 Missing
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 25 0 0 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 68 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 65 70000 101325 Missing
TEMP Land Report Wind Vector difference (m/s) WMO BLOCK 50 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: rms(fg_depar)=8, expected range: 0.00 6.30
SYNOP Surface pressure (Pa) WMO BLOCK 63 0 0 : OutOfRange
Slightly: rms(fg_depar)=230, expected range: 0.00 220.00
European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 94 0 400 : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=1028, expected range: 1200.00 2000.00
TEMP Land Report Temperature (k) WMO BLOCK 24 40000 70000 : OutOfRange
Slightly: count(*)=72, expected range: 23.00 70.00
TEMP Land Report Temperature (k) WMO BLOCK 29 0 40000 : OutOfRange
Slightly: rms(fg_depar)=2, expected range: 0.00 2.90
TEMP Land Report Temperature (k) WMO BLOCK 37 0 40000 : OutOfRange
Slightly: rms(fg_depar)=3, expected range: 0.29 2.70
BUOYS
1601569 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=226, expected range: 0.00 116.00
4101702 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
2301536 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=77, expected range: 0.00 70.00
2301556 189 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
ship
D5DS3 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)=56, expected range: 0.00 50.00
VRWL4 SHIP Report Wind Vector difference (m/s) : OutOfRange
10 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=88, expected range: 0.00 50.00
ZCDG8 SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
44037 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)=72, expected range: 0.00 70.00
VTFG Automatic SHIP Report 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
9HA3667 SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
synop
40942 SYNOP Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
04158 170 Surface pressure (Pa) : OutOfRange
16 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=86, expected range: 0.00 50.00
89014 Land Automatic Report Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
47189 Land Automatic Report Surface pressure (Pa) : OutOfRange
6 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
16310 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
14253 170 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
08095 170 Z (m) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
Radiosondes
30673 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=10, expected range: -0.76 5.20
Severely: rms(fg_depar)=14, expected range: 0.00 5.60
50527 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=9, expected range: -0.53 6.10
Severely: rms(fg_depar)=12, expected range: 0.00 7.30
72456 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=10, expected range: 0.00 5.00
72493 109 Q (g/kg) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00