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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2019-04-15 18:00

cris
All NPP CrIS radiances Missing
NOAA-20 CrIS 912 radiances : OutOfRange
39 times in the last 10 days for at least one item
Severely: count(*)=5998, expected range: 2.00 3520.00
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
iasi
METOP-A IASI 1786 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.37 0.48
mhs
METOP-C MHS 4 allsky radiances : OutOfRange
5 times in the last 10 days for at least one item
Slightly: avg(norm_fg_depar)=0, expected range: -0.04 0.03
airep
VIR155M AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
amdar
EU0166 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
amsua
NOAA-18 AMSU-A 14 radiances : OutOfRange
9 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.33 -0.24
Atmospheric Motion Vector
All AQUA cloudy WV 0 40000 Missing
In-Situ measurements
All PILOT Wind Vector difference (m/s) WMO BLOCK 71 0 40000 Missing
All European Wind Profiler Wind Vector difference (m/s) 01 0 40000 Missing
All European Wind Profiler Wind Vector difference (m/s) 02 0 40000 Missing
All TEMP Land Report Temperature (k) 04 0 40000 Missing
All TEMP Land Report Temperature (k) 04 40000 70000 Missing
All TEMP Land Report Temperature (k) 04 70000 101325 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 71 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 71 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 71 70000 101325 Missing
SYNOP Surface pressure (Pa) WMO BLOCK 21 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=25, expected range: 26.00 37.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 47 0 0 : OutOfRange
Slightly: count(*)=12, expected range: 12.70 23.00
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
5401633 189 Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
ship
WDC7379 SHIP Report Wind Vector difference (m/s) : OutOfRange
9 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=87, expected range: 0.00 50.00
9HA3062 SHIP Report Surface pressure (Pa) : OutOfRange
6 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=95, expected range: 0.00 50.00
V7UT6 SHIP Report Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=90, expected range: 0.00 50.00
VRRD7 SHIP Report Surface pressure (Pa) : OutOfRange
8 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=72, expected range: 0.00 50.00
9V9399 SHIP Report Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=80, expected range: 0.00 50.00
9V3867 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
V7AE7 SHIP Report Wind Vector difference (m/s) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
synop
89662 Land Automatic Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
08166 170 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 75.00