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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2017-06-26 12:00

airs
AQUA AIRS 1003 radiances : OutOfRange
3 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=0, expected range: 0.24 0.33
AQUA AIRS 1012 radiances : OutOfRange
3 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=0, expected range: 0.23 0.33
AQUA AIRS 1024 radiances : OutOfRange
2 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=0, expected range: 0.22 0.30
AQUA AIRS 1095 radiances : OutOfRange
2 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=0, expected range: 0.24 0.37
gpsro
All COSMIC-6 rising RO bending angles Missing
TERRA-SAR-X setting RO bending angles 30-40 km : OutOfRange
Slightly: stddev_n_fg_depar=0, expected range: 0.75 1.51
TANDEM-X rising RO bending angles 20-30 km : OutOfRange
Slightly: stddev_n_fg_depar=1, expected range: 0.61 1.36
iasi
METOP-B IASI 113 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.03 0.01
Ozone
METOP-A GOME-2 layer ozone, top pressure 1 : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=20982, expected range: 32000.00 45000.00
ssmis
DMSP-17 SSMIS 18 allsky radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.95 0.27
DMSP-18 SSMIS 14 allsky radiances : OutOfRange
Slightly: avg(biascorr)=1, expected range: 1.60 2.30
airep
AHY101 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
AAL65 AIREP Temperature (k) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=86, expected range: 0.00 70.00
amdar
SL0010 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 1.95
EU6550 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.00 1.10
SL0106 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.10
VIY12KBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.48
OSTUNVJA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-2, expected range: -1.18 0.84
Severely: rms(fg_depar)=4, expected range: 0.00 1.62
1QJKTKBA 146 Temperature (k) 70000 101325 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
In-Situ measurements
Drifter Buoy Surface pressure (Pa) WMO BLOCK 63 0 0 : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=97, expected range: 106.00 110.00
All PILOT Wind Vector difference (m/s) WMO BLOCK 61 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 67 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 44 70000 101325 Missing
TEMP Land Report Temperature (k) WMO BLOCK 35 0 40000 : OutOfRange
Considerably: rms(fg_depar)=2, expected range: 0.64 1.87
TEMP Land Report Wind Vector difference (m/s) WMO BLOCK 26 0 40000 : OutOfRange
Slightly: avg(fg_depar)=4, expected range: 0.76 4.40
BUOYS
1701501 189 Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=60, expected range: 0.00 50.00
metar
SBLO METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=255, expected range: 0.00 117.00
ENHE METAR 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
ship
VRYO4 SHIP Report Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=83, expected range: 0.00 50.00
V7WS7 SHIP Report Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=72, expected range: 0.00 50.00
XXX 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)=75, expected range: 0.00 70.00
synop
41270 Land Automatic Report Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=53, expected range: 0.00 50.00
16014 170 Z (m) : OutOfRange
5 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=57, expected range: 0.00 50.00
22165 170 Surface pressure (Pa) : OutOfRange
20 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
07666 170 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=159, expected range: 0.00 94.00
07747 170 RH2m (%s) : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.21
07747 170 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=262, expected range: 0.00 143.00
41785 SYNOP Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
15199 170 Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
Radiosondes
35700 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=-6, expected range: -2.70 3.40
Severely: rms(fg_depar)=6, expected range: 0.00 3.20
Considerably: freq(qc_pge)=76, expected range: 0.00 70.00
65344 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=5, expected range: 0.25 3.40

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