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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-03-03 12:00

ssmis
DMSP-18 SSMIS 3 allsky radiances : OutOfRange
19 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.15 0.32
airep
AVA120 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
amdar
EU0884 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=10, expected range: 0.00 6.10
VGAW40RA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
1ENJ35RA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
amsua
NOAA-18 AMSU-A 6 radiances : OutOfRange
Considerably: stdev(norm_fg_depar)=0, expected range: 0.78 0.90
Slightly: avg(biascorr)=0, expected range: -0.35 -0.28
NOAA-18 AMSU-A 7 radiances : OutOfRange
Considerably: avg(biascorr)=0, expected range: 0.15 0.23
Slightly: stdev(norm_fg_depar)=0, expected range: 0.78 0.89
NOAA-18 AMSU-A 8 radiances : OutOfRange
1 times in the last 10 days for at least one item
Considerably: stdev(norm_fg_depar)=0, expected range: 0.81 0.88
Considerably: avg(biascorr)=0, expected range: 0.09 0.15
In-Situ measurements
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 58 0 0 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 98 0 40000 Missing
TEMP Land Report Temperature (k) 07 40000 70000 : OutOfRange
Severely: count(*)=348, expected range: 410.00 460.00
TEMP Land Report Temperature (k) 07 70000 101325 : OutOfRange
Considerably: count(*)=296, expected range: 350.00 460.00
SHIP Surface pressure (Pa) Africa 1 1 : OutOfRange
Slightly: rms(fg_depar)=108, expected range: 54.00 108.00
TEMP Land Report Temperature (k) WMO BLOCK 25 0 40000 : OutOfRange
Slightly: rms(fg_depar)=4, expected range: 0.00 3.50
TEMP Land Report Temperature (k) WMO BLOCK 98 0 40000 : OutOfRange
Slightly: count(*)=24, expected range: 97.00 400.00
TEMP Land Report Temperature (k) WMO BLOCK 98 70000 101325 : OutOfRange
Slightly: count(*)=10, expected range: 10.90 148.00
TEMP Land Report Wind Vector difference (m/s) 07 0 40000 : OutOfRange
Slightly: count(*)=665, expected range: 670.00 940.00
BUOYS
4802004 189 Surface pressure (Pa) : OutOfRange
6 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=56, expected range: 0.00 50.00
4101702 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=87, expected range: 0.00 70.00
4701658 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
metar
UMGG METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=191, expected range: 0.00 121.00
VOMM METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=172, expected range: 8.00 72.00
KMPV METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=232, expected range: 0.00 121.00
ENLA METAR Surface pressure (Pa) : OutOfRange
9 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=94, expected range: 0.00 70.00
ship
CFN3031 Automatic 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)=86, expected range: 0.00 50.00
VRWL4 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)=81, expected range: 0.00 50.00
44150 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Severely: avg(fg_depar)=26, expected range: -2.20 6.30
Severely: rms(fg_depar)=28, expected range: 0.00 7.00
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
41064 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=284, expected range: 0.00 146.00
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
44009 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=26, expected range: -1.23 6.90
Severely: rms(fg_depar)=26, expected range: 0.00 7.60
CFL24 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
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)=83, expected range: 0.00 70.00
VOLG Automatic SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=91, expected range: 0.00 70.00
VRRB5 SHIP Report Wind Vector difference (m/s) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=91, 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)=51, 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
95527 170 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=202, expected range: 0.00 113.00
68577 Land Automatic Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
04950 170 RH2m (%s) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
08481 170 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=90, expected range: 0.00 70.00
Radiosondes
25400 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=6, expected range: 0.00 3.40
86218 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=8, expected range: 0.00 2.80
24125 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00