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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2019-01-17 00:00

cris
NOAA-20 CrIS 981 radiances : OutOfRange
18 times in the last 10 days for at least one item
Considerably: count(*)=6941, expected range: 2.00 5203.00
NPP CrIS 21 radiances : OutOfRange
15 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.06 0.18
gpsro
All COSMIC-1 setting RO bending angles Missing
All COSMIC-1 rising RO bending angles Missing
All COSMIC-6 rising RO bending angles Missing
ssmis
DMSP-18 SSMIS 13 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(norm_fg_depar)=0, expected range: -0.02 0.01
amdar
RN1UOFJA 146 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
IZUEOGZA 146 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
Atmospheric Motion Vector
METEOSAT-11 VIS2 70000 110000 : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=1, expected range: 2.00 14.70
NOAA-18 IR 70000 110000 : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=1, expected range: 2.00 11.80
In-Situ measurements
Land Automatic Report Surface pressure (Pa) WMO BLOCK 96 0 0 : OutOfRange
4 times in the last 10 days for at least one item
Severely: count(*)=7, expected range: -0.16 4.60
All SYNOP RH2m (%s) WMO BLOCK 28 70000 101325 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 70 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 87 0 40000 Missing
All TEMP SHIP Report Temperature (k) North America 0 40000 Missing
All TEMP SHIP Report Temperature (k) North America 40000 70000 Missing
All TEMP SHIP Report Temperature (k) North America 70000 101325 Missing
All TEMP SHIP Report Temperature (k) North Atlantic 0 40000 Missing
All TEMP SHIP Report Temperature (k) North Atlantic 40000 70000 Missing
All TEMP SHIP Report Temperature (k) North Atlantic 70000 101325 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 87 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 87 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 87 70000 101325 Missing
All TEMP Land Report Q (g/kg) WMO BLOCK 54 0 40000 Missing
Land Automatic Report Surface pressure (Pa) WMO BLOCK 45 0 0 : OutOfRange
Slightly: count(*)=22, expected range: 26.00 27.00
BUOYS
1501522 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
ship
62149 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
6 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
WDE8761 SHIP Report Surface pressure (Pa) : OutOfRange
14 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
46036 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
11 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
synop
37801 SYNOP Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=53, expected range: 0.00 50.00
44212 SYNOP Surface pressure (Pa) : OutOfRange
27 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=75, expected range: 0.00 50.00
06204 170 Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
40175 170 Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
Radiosondes
32540 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=16, expected range: -1.51 8.40
Severely: rms(fg_depar)=19, expected range: 0.00 9.80
72202 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=5, expected range: 0.59 2.40
91212 109 Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
24266 TEMP Land Report Temperature (k) 70000 101325 : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
24688 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=90, expected range: 0.00 75.00