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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

airs
AQUA AIRS 1111 radiances : DataMissing
gpsro
TERRA-SAR-X setting RO bending angles 0-10 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=914, expected range: 1670.00 7100.00
TERRA-SAR-X setting RO bending angles 10-20 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=1213, expected range: 2400.00 9700.00
TERRA-SAR-X setting RO bending angles 20-30 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=896, expected range: 1810.00 7200.00
TERRA-SAR-X setting RO bending angles 30-40 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=751, expected range: 1550.00 6000.00
TERRA-SAR-X setting RO bending angles 40-50 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=758, expected range: 1560.00 5800.00
TERRA-SAR-X setting RO bending angles 50-60 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=22, expected range: 48.00 171.00
COSMIC-1 setting RO bending angles 20-30 km : OutOfRange
Slightly: stddev_n_fg_depar=1, expected range: 0.74 1.17
TANDEM-X rising RO bending angles 0-10 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=203, expected range: 240.00 3100.00
TANDEM-X rising RO bending angles 10-20 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=263, expected range: 290.00 4500.00
Slightly: avg_n_fg_depar=0, expected range: -0.35 0.03
TANDEM-X rising RO bending angles 20-30 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=195, expected range: 210.00 3300.00
TANDEM-X rising RO bending angles 30-40 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=165, expected range: 176.00 2800.00
TANDEM-X rising RO bending angles 50-60 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=5, expected range: 5.20 84.00
Ozone
NOAA-19 SBUV layer ozone, top pressure 63940 : OutOfRange
14 times in the last 10 days for at least one item
Considerably: stdev_fg_depar_du=2, expected range: 1.06 2.27
ssmis
DMSP-18 SSMIS 7 allsky radiances : OutOfRange
13 times in the last 10 days for at least one item
Slightly: avg(biascorr)=5, expected range: 5.81 6.30
airep
ACA876 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=12, expected range: -1.27 7.30
Severely: rms(fg_depar)=17, expected range: 0.00 7.80
UAL990 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=84, expected range: 0.00 70.00
NAX7011 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
amdar
XCECTQJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=7, expected range: 1.09 4.60
Severely: rms(fg_depar)=7, expected range: 1.31 5.10
PORENXBA 146 Temperature (k) 40000 70000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=3, expected range: -0.93 0.62
Severely: rms(fg_depar)=3, expected range: 0.00 1.20
EU0454 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.25
CKFZ45BA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
DG1JAZJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
4MVHHLRA 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)=72, expected range: 0.00 70.00
MZNUC3ZA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
In-Situ measurements
SYNOP Surface pressure (Pa) WMO BLOCK 93 0 0 : OutOfRange
3 times in the last 10 days for at least one item
Severely: count(*)=25, expected range: 133.00 192.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 72 0 0 : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=72, expected range: 40.00 55.00
All SYNOP Surface pressure (Pa) WMO BLOCK 92 0 0 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
All PILOT Wind Vector difference (m/s) WMO BLOCK 68 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 70 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 65 70000 101325 Missing
Land Automatic Report Surface pressure (Pa) 01 0 0 : OutOfRange
4 times in the last 10 days for at least one item
Slightly: count(*)=69, expected range: -42.00 66.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 13 0 0 : OutOfRange
Slightly: count(*)=192, expected range: 193.00 220.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 64 0 0 : OutOfRange
Slightly: count(*)=215, expected range: 176.00 210.00
BUOYS
5401541 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=157, expected range: 0.00 104.00
2301565 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=256, expected range: 0.00 107.00
4101539 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=-222, expected range: -60.00 119.00
Severely: rms(fg_depar)=222, 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
metar
EGXZ METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=300, expected range: 0.00 91.00
ENLA METAR 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
ship
46004 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=65, expected range: 0.00 50.00
A8HY8 SHIP Report Wind Vector difference (m/s) : OutOfRange
1 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=63, expected range: 0.00 50.00
V7BY3 SHIP Report Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=69, expected range: 0.00 50.00
PHET SHIP Report Wind Vector difference (m/s) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
VRRI4 SHIP Report Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, 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
PDAN 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
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
12510 170 Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=85, expected range: 0.00 70.00
16480 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
38836 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
Radiosondes
40875 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=8, expected range: 2.20 6.20
Severely: rms(fg_depar)=10, expected range: 2.50 7.00
47169 109 Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
11120 109 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-3, expected range: -1.14 0.89
Severely: rms(fg_depar)=4, expected range: 0.00 1.58