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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-04-08 00:00

airs
AQUA AIRS 1111 radiances : DataMissing
AQUA AIRS 227 radiances : OutOfRange
13 times in the last 10 days for at least one item
Considerably: avg(biascorr)=0, expected range: -0.57 -0.54
gpsro
COSMIC-1 setting RO bending angles 0-10 km : OutOfRange
Slightly: avg_n_fg_depar=0, expected range: -0.09 0.07
COSMIC-1 setting RO bending angles 40-50 km : OutOfRange
Slightly: stddev_n_fg_depar=0, expected range: 0.28 0.78
mhs
NOAA-18 MHS 3 allsky radiances : OutOfRange
4 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.31 0.54
Ozone
NOAA-19 SBUV layer ozone, top pressure 63940 : OutOfRange
9 times in the last 10 days for at least one item
Considerably: stdev_fg_depar_du=2, expected range: 1.02 2.27
ssmis
DMSP-18 SSMIS 7 allsky radiances : OutOfRange
6 times in the last 10 days for at least one item
Slightly: avg(biascorr)=5, expected range: 5.81 6.40
airep
NAX7191 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=20, expected range: -3.40 10.70
Severely: rms(fg_depar)=22, expected range: 0.00 14.50
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
UAL924 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=15, expected range: -1.15 8.00
Severely: rms(fg_depar)=18, expected range: 0.00 10.10
ACA864 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=18, expected range: -1.32 8.80
AMX008 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=13, expected range: -1.97 8.10
NAX7023 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
amdar
5FLUHWRA 146 Temperature (k) 0 40000 : OutOfRange
2 times in the last 10 days for at least one item
Severely: avg(fg_depar)=6, expected range: -2.40 2.80
Severely: rms(fg_depar)=6, expected range: 0.00 2.30
Considerably: freq(qc_pge)=90, expected range: 0.00 70.00
CAVIESZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-1, expected range: -0.60 0.60
Severely: rms(fg_depar)=3, expected range: 0.00 1.23
LAN704 AMDAR Wind Vector difference (m/s) 0 40000 : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
EU1516 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
AEA057 AMDAR Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=77, expected range: 0.00 70.00
D4WXUJBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
152IERBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=86, expected range: 0.00 70.00
VNWI3GJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
In-Situ measurements
All SYNOP Surface pressure (Pa) WMO BLOCK 92 0 0 Missing
All European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 11 0 400 Missing
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 62 0 0 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 70 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
All TEMP Land Report Temperature (k) WMO BLOCK 73 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 73 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 73 70000 101325 Missing
Land Automatic Report Surface pressure (Pa) 06 0 0 : OutOfRange
Slightly: count(*)=73, expected range: -10.70 62.00
TEMP Land Report Temperature (k) WMO BLOCK 50 0 40000 : OutOfRange
Slightly: count(*)=34, expected range: 36.00 84.00
BUOYS
5401620 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=363, expected range: 0.00 129.00
5401594 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=337, expected range: 0.00 136.00
5401597 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=341, expected range: 0.00 162.00
4400765 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
metar
VABB METAR Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=143, expected range: -126.00 52.00
MHLM METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=293, expected range: 0.00 138.00
DAUU METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=407, expected range: 0.00 136.00
KDYA METAR Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
pilot
43311 PILOT Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=6, expected range: 1.87 4.10
Severely: rms(fg_depar)=6, expected range: 1.91 5.00
42369 PILOT Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=11, expected range: 1.01 7.50
ship
42003 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Severely: rms(fg_depar)=8, expected range: 0.00 5.50
46206 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
3 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
12510 170 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
04160 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
89817 Land Automatic Report Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
Radiosondes
43110 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=6, expected range: 0.00 3.90
06260 109 Q (g/kg) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00