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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

Early delivery 4D-VAR at 2018-02-13 12:00

cris
110 NPP CrIS 1 radiances have reduced counts (see example): OutOfRange
Severely: count(*)=5275, expected range: 7300.00 11100.00
Geostationary CSR
All Himawari-8 AHI radiances Missing
gpsro
All COSMIC-1 setting RO bending angles Missing
All COSMIC-1 rising RO bending angles Missing
All COSMIC-6 setting RO bending angles Missing
iasi
METOP-B IASI 299 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.32 -0.03
METOP-A IASI 210 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.05 0.08
METOP-A IASI 212 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.26 -0.09
METOP-A IASI 299 radiances : OutOfRange
2 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.50 -0.20
amdar
EU0731 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.01 1.04
SL0123 146 Temperature (k) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=3, expected range: 0.00 1.32
AFZA24 AMDAR Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.48
3OPBESRA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.00 0.98
0P0RWCZA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.40
K0GMVHJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
KHSJNZZA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
amsua
METOP-A AMSU-A 6 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.55 -0.48
Atmospheric Motion Vector
All Himawari-8 IR1 0 40000 Missing
All NOAA-19 IR 0 40000 Missing
All AQUA IR 0 40000 Missing
In-Situ measurements
TEMP Land Report Temperature (k) WMO BLOCK 36 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=5, expected range: 0.00 3.50
Slightly: avg(fg_depar)=-1, expected range: -1.53 1.54
TEMP Land Report Temperature (k) WMO BLOCK 81 0 40000 : OutOfRange
Severely: avg(fg_depar)=2, expected range: -0.36 1.47
Severely: rms(fg_depar)=4, expected range: 0.08 2.50
All Japanese Wind Profiler Wind Vector difference (m/s) WMO BLOCK 47 0 400 Missing
All European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 11 0 400 Missing
All European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 95 0 400 Missing
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 15 0 0 Missing
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 93 0 0 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 93 0 40000 Missing
Land Automatic Report Surface pressure (Pa) WMO BLOCK 68 0 0 : OutOfRange
Considerably: count(*)=141, expected range: 186.00 280.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 47 0 0 : OutOfRange
Considerably: count(*)=53, expected range: 60.00 78.00
SYNOP Surface pressure (Pa) WMO BLOCK 61 0 0 : OutOfRange
Slightly: rms(fg_depar)=99, expected range: 41.00 94.00
TEMP Land Report Temperature (k) WMO BLOCK 70 0 40000 : OutOfRange
Slightly: rms(fg_depar)=2, expected range: 0.19 2.10
TEMP Land Report Temperature (k) WMO BLOCK 80 0 40000 : OutOfRange
Slightly: rms(fg_depar)=3, expected range: 0.34 2.70
TEMP SHIP Report Wind Vector difference (m/s) North Atlantic 40000 700 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(fg_depar)=5, expected range: 0.13 5.00
Slightly: rms(fg_depar)=6, expected range: 0.00 6.20
BUOYS
2301560 189 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
1501535 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
ship
D5DS3 SHIP Report Wind Vector difference (m/s) : OutOfRange
16 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=93, expected range: 0.00 50.00
LF6K 182 Wind Vector difference (m/s) : OutOfRange
Severely: avg(fg_depar)=23, expected range: -4.70 11.80
Severely: rms(fg_depar)=25, expected range: 0.00 12.70
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
VOLG 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
V7ZZ5 SHIP Report 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
63117 Automatic SHIP Report 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
synop
89646 Land Automatic Report Surface pressure (Pa) : OutOfRange
5 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
01107 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
Radiosondes
70350 109 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.90
36003 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
2 times in the last 10 days for at least one item
Severely: rms(fg_depar)=9, expected range: 0.00 3.10
81405 109 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=2, expected range: -0.36 1.47
Severely: rms(fg_depar)=4, expected range: 0.08 2.50
71917 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=-1, expected range: -0.86 0.84
72357 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=5, expected range: 0.00 3.70
80398 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=8, expected range: 0.00 3.80