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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-07-18 12:00

gpsro
All COSMIC-6 setting RO bending angles Missing
FY-3C rising RO bending angles 10-20 km : OutOfRange
Slightly: avg_n_fg_depar=0, expected range: -0.27 0.00
FY-3C rising RO bending angles 20-30 km : OutOfRange
Slightly: avg_n_fg_depar=0, expected range: -0.35 0.03
ssmis
DMSP-17 SSMIS 1 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=7429, expected range: 8300.00 15400.00
DMSP-17 SSMIS 3 allsky radiances : OutOfRange
Slightly: count(*)=3323, expected range: 3600.00 6900.00
DMSP-17 SSMIS 5 allsky radiances : OutOfRange
Slightly: count(*)=16188, expected range: 19400.00 34000.00
Slightly: avg(norm_fg_depar)=0, expected range: -0.01 0.01
DMSP-17 SSMIS 6 allsky radiances : OutOfRange
Slightly: count(*)=16456, expected range: 19800.00 35000.00
DMSP-17 SSMIS 7 allsky radiances : OutOfRange
Slightly: count(*)=16452, expected range: 19800.00 35000.00
DMSP-17 SSMIS 8 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=10914, expected range: 12200.00 23000.00
DMSP-17 SSMIS 9 allsky radiances : OutOfRange
Slightly: count(*)=13256, expected range: 15500.00 28000.00
DMSP-17 SSMIS 10 allsky radiances : OutOfRange
Slightly: count(*)=18990, expected range: 23000.00 42000.00
DMSP-17 SSMIS 11 allsky radiances : OutOfRange
Slightly: count(*)=19870, expected range: 24000.00 44000.00
DMSP-17 SSMIS 12 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=11010, expected range: 12300.00 23000.00
DMSP-17 SSMIS 13 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=11025, expected range: 12400.00 23000.00
DMSP-17 SSMIS 14 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=10910, expected range: 12300.00 23000.00
DMSP-17 SSMIS 15 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=10872, expected range: 12200.00 23000.00
DMSP-17 SSMIS 16 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=10936, expected range: 12300.00 23000.00
DMSP-17 SSMIS 17 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=10963, expected range: 12300.00 23000.00
DMSP-17 SSMIS 18 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=10965, expected range: 12300.00 23000.00
amdar
SL0010 146 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=3, expected range: -1.17 1.23
EU5478 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.50
SL0010 146 Temperature (k) 40000 70000 : OutOfRange
2 times in the last 10 days for at least one item
Severely: avg(fg_depar)=1, expected range: -0.87 0.81
Severely: rms(fg_depar)=2, expected range: 0.13 1.41
ZA5ENVJA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.10
RTSFGCRA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.20
HPVWUWBA 146 Temperature (k) 0 40000 : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=82, expected range: 0.00 75.00
HPVWUWBA 146 Temperature (k) 70000 101325 : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 75.00
In-Situ measurements
Drifter Buoy Surface pressure (Pa) WMO BLOCK 53 0 0 : OutOfRange
Severely: rms(fg_depar)=220, expected range: 0.00 116.00
All SYNOP Surface pressure (Pa) WMO BLOCK 92 0 0 Missing
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 70 0 0 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 91 0 40000 Missing
Land Automatic Report Surface pressure (Pa) WMO BLOCK 35 0 0 : OutOfRange
Slightly: count(*)=14, expected range: 14.10 17.60
BUOYS
4601592 189 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
1601518 189 Surface pressure (Pa) : OutOfRange
9 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=58, expected range: 0.00 50.00
0022959 189 Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=78, expected range: 0.00 50.00
5301511 189 Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=-364, expected range: -95.00 123.00
Severely: rms(fg_depar)=490, expected range: 0.00 143.00
1601561 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=318, expected range: 0.00 142.00
metar
OIBP METAR Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=-276, expected range: -120.00 104.00
Severely: rms(fg_depar)=296, expected range: 0.00 97.00
ship
9V2779 SHIP Report Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=65, expected range: 0.00 50.00
VOLG Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
synop
68549 Land Automatic Report Surface pressure (Pa) : OutOfRange
11 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=69, expected range: 0.00 50.00
02554 170 RH2m (%s) : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.23
02546 170 RH2m (%s) : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.19
38933 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
Radiosondes
24688 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=7, expected range: 0.23 5.10
94120 109 Q (g/kg) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
72340 109 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.52
FPUW5GN 111 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=10, expected range: -1.26 0.93
Severely: rms(fg_depar)=10, expected range: 0.00 1.28
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00