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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-03-04 00:00

Ozone
METOP-B GOME-2 layer ozone, top pressure 1 : OutOfRange
10 times in the last 10 days for at least one item
Slightly: stdev_fg_depar_du=5, expected range: 4.90 5.83
ssmis
DMSP-18 SSMIS 1 allsky radiances : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=9486, expected range: 11700.00 15700.00
Slightly: avg(biascorr)=2, expected range: 1.79 2.55
DMSP-18 SSMIS 6 allsky radiances : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=16268, expected range: 21000.00 29000.00
DMSP-18 SSMIS 9 allsky radiances : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=12556, expected range: 16200.00 21000.00
DMSP-18 SSMIS 10 allsky radiances : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=15980, expected range: 21000.00 28000.00
DMSP-18 SSMIS 11 allsky radiances : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=16007, expected range: 21000.00 28000.00
DMSP-18 SSMIS 12 allsky radiances : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=12722, expected range: 16400.00 21000.00
DMSP-18 SSMIS 13 allsky radiances : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=12760, expected range: 16400.00 21000.00
DMSP-18 SSMIS 14 allsky radiances : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=12705, expected range: 16200.00 21000.00
DMSP-18 SSMIS 15 allsky radiances : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=12408, expected range: 15900.00 21000.00
DMSP-18 SSMIS 16 allsky radiances : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=12502, expected range: 16000.00 21000.00
DMSP-18 SSMIS 17 allsky radiances : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=12627, expected range: 16200.00 21000.00
DMSP-18 SSMIS 18 allsky radiances : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=12658, expected range: 16200.00 21000.00
DMSP-18 SSMIS 2 allsky radiances : OutOfRange
2 times in the last 10 days for at least one item
Considerably: count(*)=10317, expected range: 12000.00 17600.00
DMSP-18 SSMIS 3 allsky radiances : OutOfRange
20 times in the last 10 days for at least one item
Considerably: count(*)=12587, expected range: 15900.00 23000.00
Considerably: avg(biascorr)=0, expected range: 0.15 0.31
DMSP-18 SSMIS 7 allsky radiances : OutOfRange
2 times in the last 10 days for at least one item
Considerably: count(*)=16262, expected range: 20000.00 28000.00
DMSP-18 SSMIS 4 allsky radiances : OutOfRange
6 times in the last 10 days for at least one item
Slightly: count(*)=16260, expected range: 19200.00 31000.00
Slightly: avg(biascorr)=-1, expected range: -1.35 -1.12
amdar
CNFQUL AMDAR Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=10, expected range: 0.19 7.00
SL0091 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.16
Y3ITZHJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
amsua
NOAA-18 AMSU-A 8 radiances : OutOfRange
Slightly: avg(norm_fg_depar)=0, expected range: -0.03 0.22
In-Situ measurements
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 58 0 0 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 65 70000 101325 Missing
Drifter Buoy Surface pressure (Pa) WMO BLOCK 31 0 0 : OutOfRange
Considerably: rms(fg_depar)=134, expected range: 0.04 95.00
SYNOP Surface pressure (Pa) WMO BLOCK 57 0 0 : OutOfRange
Slightly: rms(fg_depar)=161, expected range: 13.70 140.00
SYNOP Surface pressure (Pa) WMO BLOCK 60 0 0 : OutOfRange
Slightly: avg(fg_depar)=-33, expected range: -32.00 54.00
TEMP Land Report Temperature (k) WMO BLOCK 22 0 40000 : OutOfRange
Slightly: rms(fg_depar)=2, expected range: 0.26 2.60
TEMP Land Report Wind Vector difference (m/s) WMO BLOCK 22 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=128, expected range: 131.00 240.00
TEMP Land Report Wind Vector difference (m/s) WMO BLOCK 50 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(fg_depar)=4, expected range: 0.67 4.20
BUOYS
4802004 189 Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=55, expected range: 0.00 50.00
2200184 Moored Buoy Surface pressure (Pa) : OutOfRange
5 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
6301557 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
metar
DAOB METAR Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=260, expected range: 0.00 146.00
DAUB METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=322, expected range: 0.00 133.00
VIJP METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=196, expected range: 0.00 130.00
SBCT METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=288, expected range: 0.00 156.00
ENLA METAR Surface pressure (Pa) : OutOfRange
10 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
pilot
42182 PILOT Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
ship
VRWL4 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)=82, expected range: 0.00 50.00
VTWS Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
4 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=51, expected range: 0.00 50.00
VRID6 SHIP Report Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=55, expected range: 0.00 50.00
D5DS3 SHIP Report Wind Vector difference (m/s) : OutOfRange
6 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=53, expected range: 0.00 50.00
44009 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
2 times in the last 10 days for at least one item
Severely: avg(fg_depar)=24, expected range: -1.42 7.20
Severely: rms(fg_depar)=24, expected range: 0.00 7.80
44150 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)=100, expected range: 0.00 70.00
CFL24 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
synop
08345 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
04158 170 Surface pressure (Pa) : OutOfRange
15 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=84, expected range: 0.00 50.00
94809 170 RH2m (%s) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=0, expected range: 0.00 0.22
89817 Land Automatic Report Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
08271 170 Surface pressure (Pa) : OutOfRange
10 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
08481 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 70.00
Radiosondes
34731 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=7, expected range: 0.36 4.80
Severely: rms(fg_depar)=8, expected range: 0.03 5.90
22522 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=6, expected range: 0.00 2.70
60715 TEMP Land Report Q (g/kg) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00