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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-04-11 00:00

airs
AQUA AIRS 227 radiances : OutOfRange
19 times in the last 10 days for at least one item
Severely: avg(biascorr)=0, expected range: -0.57 -0.54
AQUA AIRS 1111 radiances : DataMissing
mhs
NOAA-18 MHS 3 allsky radiances : OutOfRange
10 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.32 0.54
Ozone
NOAA-19 SBUV layer ozone, top pressure 63940 : OutOfRange
12 times in the last 10 days for at least one item
Slightly: stdev_fg_depar_du=2, expected range: 1.08 2.27
amdar
NLEEOGZA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=9, expected range: 0.34 5.90
Severely: rms(fg_depar)=10, expected range: 0.39 6.90
SL0006 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.30
S1KJN1ZA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.91
AU0162 AMDAR Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.10
CUEUILJA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=-2, expected range: -1.41 1.44
00WUILJA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=-2, expected range: -1.37 1.29
Z3SUNVZA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=-2, expected range: -1.41 1.26
KLM706 AMDAR Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=87, expected range: 0.00 70.00
AEA057 AMDAR Wind Vector difference (m/s) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
BAW248 AMDAR Wind Vector difference (m/s) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=77, expected range: 0.00 70.00
5Y22YEBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
30UL10JA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=87, expected range: 0.00 70.00
1VAXAEZA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
1QJKTKBA 146 Temperature (k) 70000 101325 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
In-Situ measurements
SYNOP Surface pressure (Pa) WMO BLOCK 93 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=87, expected range: 154.00 174.00
All SYNOP Surface pressure (Pa) WMO BLOCK 92 0 0 Missing
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 62 0 0 Missing
All AIREP Wind Vector difference (m/s) Asia 40000 70000 Missing
All AIREP Wind Vector difference (m/s) Asia 70000 101325 Missing
All AIREP Wind Vector difference (m/s) Indian Ocean 40000 70000 Missing
All AIREP Wind Vector difference (m/s) Indian Ocean 70000 101325 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 68 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 62 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 62 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 62 70000 101325 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 65 70000 101325 Missing
Land Automatic Report Surface pressure (Pa) WMO BLOCK 88 0 0 : OutOfRange
Considerably: count(*)=33, expected range: 38.00 57.00
Japanese Wind Profiler Wind Vector difference (m/s) WMO BLOCK 47 0 400 : OutOfRange
Slightly: count(*)=485, expected range: -330.00 450.00
Land Automatic Report Surface pressure (Pa) 01 0 0 : OutOfRange
3 times in the last 10 days for at least one item
Slightly: count(*)=55, expected range: -29.00 51.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 16 0 0 : OutOfRange
Slightly: rms(fg_depar)=74, expected range: 30.00 69.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 72 0 0 : OutOfRange
Slightly: count(*)=57, expected range: 40.00 55.00
Slightly: rms(fg_depar)=110, expected range: 0.00 93.00
BUOYS
7201501 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=199, expected range: 0.00 114.00
1601542 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=178, expected range: 0.00 86.00
1600516 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=223, expected range: 0.00 126.00
5501518 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=169, expected range: 0.00 61.00
1601518 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=197, expected range: 0.00 106.00
4400765 189 Surface pressure (Pa) : OutOfRange
6 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
5401597 189 Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=72, expected range: 0.00 70.00
metar
KF45 METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=156, expected range: 0.00 104.00
KLNA METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=155, expected range: 0.00 90.00
GMML METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=242, expected range: 0.00 99.00
KPMP METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=132, expected range: 0.00 88.00
ENLA METAR Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
ship
46004 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
1 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=56, expected range: 0.00 50.00
V7BY3 SHIP Report Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=66, expected range: 0.00 50.00
VRWN7 SHIP Report Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=90, expected range: 0.00 50.00
MERFR03 182 Wind Vector difference (m/s) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
42365 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)=72, expected range: 0.00 70.00
46206 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
7 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
VRKE9 SHIP Report Wind Vector difference (m/s) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
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)=91, expected range: 0.00 70.00
42059 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
8 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
VTFG Automatic SHIP Report Surface pressure (Pa) : OutOfRange
8 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
synop
40942 SYNOP Surface pressure (Pa) : OutOfRange
19 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
08481 170 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=242, expected range: 0.00 161.00
Considerably: freq(qc_pge)=90, expected range: 0.00 70.00
94326 170 RH2m (%s) : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.08 0.07
Severely: rms(fg_depar)=0, expected range: 0.00 0.09
60611 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
08271 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
04814 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=87, expected range: 0.00 70.00
47639 Land Automatic Report Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
06799 170 Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
Radiosondes
43110 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=9, expected range: 2.40 5.60
Severely: rms(fg_depar)=10, expected range: 2.60 6.50
43110 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=7, expected range: 0.00 4.00
04320 109 Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
33008 109 Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
04018 109 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
33008 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
10304 109 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.16 1.16
94998 109 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=-3, expected range: -1.35 1.62