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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-03-06 00:00

iasi
METOP-B IASI 1090 radiances : OutOfRange
Slightly: avg(fg_depar)=0, expected range: 0.03 0.12
METOP-B IASI 1345 radiances : OutOfRange
Slightly: avg(fg_depar)=0, expected range: 0.03 0.12
METOP-B IASI 1787 radiances : OutOfRange
Slightly: avg(fg_depar)=0, expected range: 0.01 0.11
METOP-B IASI 2350 radiances : OutOfRange
Slightly: avg(fg_depar)=0, expected range: 0.01 0.10
METOP-B IASI 2351 radiances : OutOfRange
Slightly: avg(fg_depar)=0, expected range: 0.02 0.10
ssmis
DMSP-18 SSMIS 3 allsky radiances : OutOfRange
19 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.15 0.27
amdar
OEGENVZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.38
HQMLFRJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=81, expected range: 0.00 70.00
GG4IRSJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
In-Situ measurements
All PILOT Wind Vector difference (m/s) WMO BLOCK 64 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 65 70000 101325 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 64 70000 101325 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 64 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 64 0 40000 Missing
Land Automatic Report Surface pressure (Pa) WMO BLOCK 47 0 0 : OutOfRange
Slightly: count(*)=1583, expected range: 1640.00 1880.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 56 0 0 : OutOfRange
Slightly: rms(fg_depar)=95, expected range: 21.00 84.00
TEMP Land Report Temperature (k) WMO BLOCK 74 40000 70000 : OutOfRange
Slightly: rms(fg_depar)=2, expected range: 0.00 1.96
Slightly: avg(fg_depar)=-1, expected range: -0.84 1.08
Moored Buoy Surface pressure (Pa) WMO BLOCK 31 0 0 : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=15, expected range: 16.40 36.00
BUOYS
4802009 189 Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=76, expected range: 0.00 50.00
1400540 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=161, expected range: 0.00 102.00
5601501 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=-368, expected range: -110.00 151.00
Severely: rms(fg_depar)=483, expected range: 0.00 116.00
1701507 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=147, expected range: 0.00 93.00
metar
ENLA METAR Surface pressure (Pa) : OutOfRange
14 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=65, expected range: 0.00 50.00
ship
VRID6 SHIP Report Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=60, expected range: 0.00 50.00
D5DS3 SHIP Report Wind Vector difference (m/s) : OutOfRange
5 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=54, expected range: 0.00 50.00
44025 Automatic 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 70.00
VTWS 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)=75, expected range: 0.00 70.00
C6TH9 SHIP Report 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 70.00
CFL24 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)=75, expected range: 0.00 70.00
synop
40942 SYNOP Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
08271 170 Surface pressure (Pa) : OutOfRange
11 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=52, expected range: 0.00 50.00
08345 170 Surface pressure (Pa) : OutOfRange
12 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=57, expected range: 0.00 50.00
04158 170 Surface pressure (Pa) : OutOfRange
15 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=85, expected range: 0.00 50.00
13625 SYNOP Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
15261 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
Radiosondes
94610 109 Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
78954 109 Q (g/kg) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
13388 109 Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
71867 109 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
71926 TEMP Land Report Q (g/kg) 40000 70000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
40800 TEMP Land Report Temperature (k) 70000 101325 : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00