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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-07-10 12:00

iasi
METOP-B IASI 1090 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.18 -0.16
METOP-B IASI 7424 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.11 -0.04
METOP-B IASI 7426 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.10 -0.04
amdar
AU0058 AMDAR Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.89
R0RIR5BA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=9, expected range: 0.00 5.90
5QEUOGBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=9, expected range: -0.05 6.20
APHQOZBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=9, expected range: 1.15 6.40
Severely: rms(fg_depar)=11, expected range: 0.77 7.70
MW4JHJJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=7, expected range: 1.49 4.60
Severely: rms(fg_depar)=8, expected range: 1.81 5.10
EU5322 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.07
ADSENVRA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.39
ADSENVRA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.54
EU8525 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.56
EU0448 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.49
AQR0GBZA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=-1, expected range: -0.39 0.85
In-Situ measurements
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 85 0 0 Missing
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 88 0 0 Missing
All Land Automatic Report RH2m (%s) WMO BLOCK 85 70000 101325 Missing
SYNOP RH2m (%s) WMO BLOCK 85 70000 101325 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=123, expected range: 55.00 76.00
All PILOT Wind Vector difference (m/s) WMO BLOCK 70 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 91 0 40000 Missing
All European Wind Profiler Wind Vector difference (m/s) 08 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 38 40000 70000 Missing
Land Automatic Report Surface pressure (Pa) WMO BLOCK 70 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=1, expected range: 2.30 24.00
SYNOP Surface pressure (Pa) WMO BLOCK 70 0 0 : OutOfRange
3 times in the last 10 days for at least one item
Slightly: count(*)=43, expected range: -17.00 40.00
BUOYS
4101539 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=238, expected range: 0.00 149.00
1501522 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
3101538 189 Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=90, expected range: 0.00 75.00
metar
PAJZ METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=243, expected range: 0.00 145.00
MMMZ METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=239, expected range: 0.00 156.00
LTCR METAR Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
ship
LAQN7 SHIP Report Wind Vector difference (m/s) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=52, expected range: 0.00 50.00
VRMV3 SHIP Report Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=65, expected range: 0.00 50.00
VOLG Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=91, expected range: 0.00 75.00
VRQZ7 SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
synop
35167 Land Automatic Report RH2m (%s) : OutOfRange
9 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=63, expected range: 0.00 50.00
47912 Land Automatic Report Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=248, expected range: 0.00 126.00
47917 Land Automatic Report Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=233, expected range: -149.00 103.00
Severely: rms(fg_depar)=250, expected range: 0.00 118.00
47927 Land Automatic Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
08103 170 Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=90, expected range: 0.00 75.00
Radiosondes
83362 TEMP Land Report Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
82965 TEMP Land Report Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
83566 TEMP Land Report Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
42724 TEMP Land Report Temperature (k) 70000 101325 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00