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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-07-11 12:00

airs
AQUA AIRS 1939 radiances : OutOfRange
Slightly: avg(biascorr)=-1, expected range: -1.57 -1.45
AQUA AIRS 2108 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.55 -0.48
gpsro
COSMIC-6 setting RO bending angles 20-30 km : OutOfRange
Severely: stddev_n_fg_depar=1, expected range: 0.71 1.28
COSMIC-6 setting RO bending angles 30-40 km : OutOfRange
1 times in the last 10 days for at least one item
Considerably: avg_n_fg_depar=0, expected range: -0.04 0.55
Slightly: stddev_n_fg_depar=1, expected range: 0.66 1.33
iasi
METOP-B IASI 7426 radiances : OutOfRange
1 times in the last 10 days for at least one item
Considerably: avg(biascorr)=0, expected range: -0.10 -0.04
METOP-B IASI 1090 radiances : OutOfRange
2 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.18 -0.15
METOP-B IASI 1191 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.28 -0.24
METOP-B IASI 1194 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.24 -0.20
METOP-B IASI 1271 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.15 -0.12
METOP-B IASI 7424 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.11 -0.03
METOP-B IASI 1345 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.22 -0.18
METOP-A IASI 1271 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.16 -0.13
METOP-A IASI 1780 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.22 -0.18
airep
VIR137Y AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=6, expected range: 0.80 4.10
Severely: rms(fg_depar)=10, expected range: 0.88 4.80
amdar
2IRRA2ZA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=10, expected range: -0.54 6.50
Severely: rms(fg_depar)=13, expected range: 0.00 8.10
ADSENVRA 146 Temperature (k) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=6, expected range: -1.25 1.69
Severely: rms(fg_depar)=6, expected range: 0.00 1.62
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
EU0251 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=5, expected range: -1.53 1.25
Severely: rms(fg_depar)=6, expected range: 0.00 1.79
Considerably: freq(qc_pge)=89, expected range: 0.00 75.00
ADSENVRA 146 Temperature (k) 40000 70000 : OutOfRange
2 times in the last 10 days for at least one item
Severely: avg(fg_depar)=3, expected range: -1.16 0.94
Severely: rms(fg_depar)=3, expected range: 0.00 1.97
AU0060 AMDAR Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.94
EU0251 146 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=8, expected range: -1.29 1.42
Severely: rms(fg_depar)=9, expected range: 0.00 1.79
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
EU0196 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.44
ADSENVRA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=3, expected range: -1.94 1.69
In-Situ measurements
Drifter Buoy Surface pressure (Pa) WMO BLOCK 13 0 0 : OutOfRange
Severely: rms(fg_depar)=229, expected range: 0.00 142.00
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 85 0 0 Missing
All Land Automatic Report RH2m (%s) WMO BLOCK 85 70000 101325 Missing
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 74 0 0 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 70 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 91 0 40000 Missing
SYNOP Surface pressure (Pa) WMO BLOCK 58 0 0 : OutOfRange
Considerably: count(*)=118, expected range: 139.00 195.00
SYNOP Surface pressure (Pa) WMO BLOCK 59 0 0 : OutOfRange
Considerably: count(*)=95, expected range: 111.00 173.00
Land Automatic Report Surface pressure (Pa) WMO BLOCK 88 0 0 : OutOfRange
3 times in the last 10 days for at least one item
Slightly: count(*)=7, expected range: 9.10 103.00
BUOYS
5401553 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=252, expected range: 0.00 128.00
4101573 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=431, expected range: 0.00 113.00
4101535 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=195, expected range: 0.00 101.00
4401564 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
3101538 189 Surface pressure (Pa) : OutOfRange
5 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
metar
SLRQ METAR Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=455, expected range: -210.00 200.00
Severely: rms(fg_depar)=495, expected range: 0.00 260.00
MMPS METAR Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=359, expected range: -181.00 164.00
Severely: rms(fg_depar)=360, expected range: 0.00 147.00
CYBU METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=270, expected range: 0.00 140.00
SUDU METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=311, expected range: 0.00 181.00
prof
10394 European Wind Profiler Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=8, expected range: 0.00 5.60
ship
LAQN7 SHIP Report Wind Vector difference (m/s) : OutOfRange
4 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=56, expected range: 0.00 50.00
V7GR8 SHIP Report Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=66, expected range: 0.00 50.00
VRRB5 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 75.00
9V9287 SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
synop
37785 SYNOP RH2m (%s) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=60, expected range: 0.00 50.00
06762 170 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 75.00
Radiosondes
83566 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=5, expected range: 2.00 4.60
Severely: rms(fg_depar)=7, expected range: 2.30 5.20
22543 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 75.00
43128 TEMP Land Report Temperature (k) 70000 101325 : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 75.00