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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-02-12 00:00

airs
AQUA AIRS 56 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.58 -0.26
AQUA AIRS 78 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -1.07 -0.80
AQUA AIRS 79 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.80 -0.57
AQUA AIRS 84 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.41 -0.15
AQUA AIRS 248 radiances : OutOfRange
2 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.26 -0.04
cris
NPP CrIS 111 radiances : OutOfRange
Considerably: avg(biascorr)=0, expected range: -0.15 -0.10
NPP CrIS 31 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.65 -0.47
NPP CrIS 114 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.12 -0.01
NPP CrIS 233 radiances : OutOfRange
2 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.39 -0.34
Geostationary CSR
METEOSAT-8 55 2 radiances : OutOfRange
4 times in the last 10 days for at least one item
Slightly: count(*)=38029, expected range: 15854.00 37529.00
amdar
53B0IGRA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.40
OEKYYRRA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.10 1.62
JR42PXRA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.00 0.92
LODEOGZA 146 Q (g/kg) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
ZHTUOGBA 146 Q (g/kg) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
GY0KM3BA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
J1EYQLBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=70, expected range: 0.00 70.00
QN3FJZBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=92, expected range: 0.00 70.00
VQHJNZJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
C2WKHYRA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=73, expected range: 0.00 70.00
RCKUIJZA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=79, expected range: 0.00 70.00
In-Situ measurements
All Japanese Wind Profiler Wind Vector difference (m/s) WMO BLOCK 47 0 400 Missing
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 42 0 0 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 93 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 63 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 65 70000 101325 Missing
SYNOP Surface pressure (Pa) WMO BLOCK 33 0 0 : OutOfRange
Considerably: count(*)=183, expected range: 192.00 210.00
Land Automatic Report Surface pressure (Pa) WMO BLOCK 41 0 0 : OutOfRange
Considerably: rms(fg_depar)=108, expected range: 24.00 84.00
SYNOP Surface pressure (Pa) 08 0 0 : OutOfRange
Slightly: count(*)=1551, expected range: 1560.00 2100.00
SYNOP Surface pressure (Pa) WMO BLOCK 37 0 0 : OutOfRange
Slightly: rms(fg_depar)=170, expected range: 30.00 164.00
BUOYS
1400912 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=216, expected range: 0.00 82.00
3301530 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
4802004 189 Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
metar
KE38 METAR Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=201, expected range: 0.00 115.00
DGAA METAR Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=353, expected range: 0.00 140.00
ENOA METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=579, expected range: 0.00 350.00
EKHN METAR Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=181, expected range: 0.00 109.00
OIGK METAR Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
LTAL METAR Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
ship
VRPY7 SHIP Report Surface pressure (Pa) : OutOfRange
16 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=81, expected range: 0.00 50.00
LF4B Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Severely: rms(fg_depar)=10, expected range: 0.00 6.90
LF4B 182 Wind Vector difference (m/s) : OutOfRange
Severely: rms(fg_depar)=10, expected range: 0.00 6.90
LF4P 182 Wind Vector difference (m/s) : OutOfRange
Severely: avg(fg_depar)=11, expected range: -1.04 5.90
Severely: rms(fg_depar)=14, expected range: 0.00 6.50
46076 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
9HXC9 SHIP Report Wind Vector difference (m/s) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
LF5C 182 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
VXKF Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
ZCDI4 SHIP Report 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
44058 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
9HXD9 SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
synop
08271 170 Surface pressure (Pa) : OutOfRange
17 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=84, expected range: 0.00 50.00
17120 SYNOP Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=284, expected range: 0.00 156.00
48870 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
04183 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
71914 170 Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
86185 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
Radiosondes
89611 109 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.85
70316 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
43185 TEMP Land Report Q (g/kg) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
32477 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00