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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

Early delivery 4D-VAR at 2019-04-16 12:00

cris
All NPP CrIS radiances Missing
NOAA-20 CrIS 614 radiances : OutOfRange
2 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.23 -0.17
gpsro
All TANDEM-X rising RO bending angles Missing
All COSMIC-1 setting RO bending angles Missing
All COSMIC-1 rising RO bending angles Missing
All COSMIC-6 rising RO bending angles Missing
All TERRA-SAR-X setting RO bending angles Missing
ssmis
All DMSP-17 SSMIS allsky radiances Missing
airep
RJA12B AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely_persistent: freq(qc_pge)=60, expected range: 0.00 50.00
ACA849 AIREP 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 75.00
amdar
IDUKGCZA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=10, expected range: 0.00 6.70
SL0079 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.00 1.05
WXJ0GCZA 146 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=5, expected range: -0.99 1.00
Severely: rms(fg_depar)=5, expected range: 0.00 2.20
EU7293 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
Atmospheric Motion Vector
GOES-15 VIS1 70000 110000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=1, expected range: 2.00 44.00
In-Situ measurements
All PILOT Wind Vector difference (m/s) WMO BLOCK 61 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 70 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 94 0 40000 Missing
Drifter Buoy Surface pressure (Pa) WMO BLOCK 15 0 0 : OutOfRange
Considerably: rms(fg_depar)=137, expected range: 22.00 100.00
TEMP Land Report Temperature (k) WMO BLOCK 43 40000 70000 : OutOfRange
Considerably: avg(fg_depar)=0, expected range: -0.48 0.82
TEMP Land Report Temperature (k) WMO BLOCK 58 0 40000 : OutOfRange
Considerably: rms(fg_depar)=2, expected range: 0.83 1.96
Land Automatic Report Surface pressure (Pa) WMO BLOCK 12 0 0 : OutOfRange
3 times in the last 10 days for at least one item
Slightly: count(*)=5, expected range: 3.10 4.80
Land Automatic Report Surface pressure (Pa) WMO BLOCK 40 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=19, expected range: 19.10 21.00
SYNOP Z (m) WMO BLOCK 15 70000 101325 : OutOfRange
Slightly: count(*)=8, expected range: 4.50 7.70
TEMP Land Report Q (g/kg) WMO BLOCK 51 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=18, expected range: 2.90 16.80
BUOYS
1601522 189 Surface pressure (Pa) : OutOfRange
38 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=98, expected range: 0.00 50.00
1501522 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
ship
WDC7379 SHIP Report Wind Vector difference (m/s) : OutOfRange
11 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=92, expected range: 0.00 50.00
YJUP4 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
6 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=84, expected range: 0.00 50.00
9V9404 SHIP Report Surface pressure (Pa) : OutOfRange
10 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
CFL24 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 75.00
synop
42931 SYNOP Surface pressure (Pa) : OutOfRange
11 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=57, expected range: 0.00 50.00
67217 SYNOP Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=79, expected range: 0.00 50.00
04166 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 75.00
Radiosondes
87860 109 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.17 1.03
43599 109 Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
04018 109 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.67
Severely: avg(fg_depar)=-2, expected range: -0.89 0.87
43599 109 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.13 0.96