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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

cris
NOAA-20 CrIS 981 radiances : OutOfRange
20 times in the last 10 days for at least one item
Considerably: count(*)=6837, expected range: 2.00 5203.00
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 2 allsky radiances : OutOfRange
Slightly: avg(norm_fg_depar)=0, expected range: -0.00 0.00
DMSP-18 SSMIS 14 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(norm_fg_depar)=0, expected range: -0.01 0.01
amdar
AU0326 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=9, expected range: 0.02 6.10
GJYZMQZA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.46
YYT0JHBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-2, expected range: -0.99 1.13
Severely: rms(fg_depar)=3, expected range: 0.00 1.60
UNSGT1JA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.00 1.27
D50LFRJA 146 Q (g/kg) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
Atmospheric Motion Vector
NOAA-15 IR 70000 110000 : OutOfRange
3 times in the last 10 days for at least one item
Slightly: count(*)=1, expected range: 2.00 38.00
In-Situ measurements
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 72 0 0 Missing
All Land Automatic Report RH2m (%s) WMO BLOCK 71 70000 101325 Missing
All SYNOP RH2m (%s) WMO BLOCK 23 70000 101325 Missing
All SYNOP RH2m (%s) WMO BLOCK 36 70000 101325 Missing
All SYNOP RH2m (%s) WMO BLOCK 44 70000 101325 Missing
All SYNOP RH2m (%s) WMO BLOCK 51 70000 101325 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 87 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 94 0 40000 Missing
All European Wind Profiler Wind Vector difference (m/s) 02 0 40000 Missing
All European Wind Profiler Wind Vector difference (m/s) 08 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
BUOYS
5501504 189 Surface pressure (Pa) : OutOfRange
16 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=57, expected range: 0.00 50.00
6301560 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 75.00
ship
A8VD9 SHIP Report Wind Vector difference (m/s) : OutOfRange
Severely_persistent: freq(qc_pge)=85, expected range: 0.00 50.00
62132 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
11 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
12 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
WDE8761 SHIP Report Surface pressure (Pa) : OutOfRange
16 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
synop
44212 SYNOP Surface pressure (Pa) : OutOfRange
27 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=70, expected range: 0.00 50.00
Radiosondes
71815 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=14, expected range: -1.16 1.72
Severely: rms(fg_depar)=16, expected range: 0.42 3.50
Considerably: freq(qc_pge)=81, expected range: 0.00 75.00
42647 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
28695 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00