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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-07-11 00:00

iasi
METOP-B IASI 1090 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.18 -0.16
amdar
EU6607 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.61
N4OKGCRA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.41
ADSENVRA 146 Temperature (k) 40000 70000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=4, expected range: -1.10 0.87
Severely: rms(fg_depar)=4, expected range: 0.00 1.54
ADSENVRA 146 Temperature (k) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
In-Situ measurements
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 70 0 0 Missing
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 85 0 0 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 70 0 40000 Missing
All TEMP SHIP Report Temperature (k) North America 0 40000 Missing
All TEMP SHIP Report Temperature (k) North Atlantic 0 40000 Missing
SYNOP Surface pressure (Pa) WMO BLOCK 58 0 0 : OutOfRange
Considerably: rms(fg_depar)=172, expected range: 4.30 131.00
Land Automatic Report Surface pressure (Pa) WMO BLOCK 88 0 0 : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=2, expected range: 9.70 102.00
SYNOP Z (m) WMO BLOCK 67 70000 101325 : OutOfRange
Slightly: count(*)=10, expected range: -4.10 7.40
Moored Buoy Surface pressure (Pa) WMO BLOCK 21 0 0 : OutOfRange
Slightly: count(*)=2, expected range: 12.00 12.10
BUOYS
48769 Drifter Buoy Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=54, expected range: 0.00 50.00
3301602 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=304, expected range: 0.00 150.00
4101539 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=391, expected range: 0.00 149.00
7401509 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
metar
DAUI METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=205, expected range: 0.00 123.00
CYQR METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=193, expected range: 0.00 127.00
SBJU METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=238, expected range: 0.00 104.00
ORSU METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=142, expected range: 0.00 89.00
CYQW METAR Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=424, expected range: -122.00 230.00
Severely: rms(fg_depar)=486, expected range: 0.00 187.00
ship
V7GR8 SHIP Report Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=65, expected range: 0.00 50.00
LAQN7 SHIP Report Wind Vector difference (m/s) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=53, expected range: 0.00 50.00
VRRB5 SHIP Report Wind Vector difference (m/s) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
VWSK Automatic SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
synop
86185 SYNOP Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=64, expected range: 0.00 50.00
47912 Land Automatic Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=91, expected range: 0.00 75.00
31102 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
Radiosondes
58847 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=8, expected range: 0.57 6.00
60680 TEMP Land Report 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
54218 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.50
72672 109 Q (g/kg) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
YLV96WM 111 Temperature (k) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
YLV96WM 111 Temperature (k) 40000 70000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=82, expected range: 0.00 75.00