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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2017-07-24 00:00

airs
AQUA AIRS 375 radiances : OutOfRange
Severely: stdev(fg_depar)=0, expected range: 0.34 0.40
AQUA AIRS 375 radiances : OutOfRange
Considerably: count(*)=1089, expected range: 2600.00 6400.00
AQUA AIRS 1424 radiances : OutOfRange
7 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.02 0.17
AQUA AIRS 2112 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.15 0.21
gpsro
All COSMIC-5 setting RO bending angles Missing
All COSMIC-5 rising RO bending angles Missing
All COSMIC-6 setting RO bending angles Missing
iasi
METOP-A IASI 97 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=0, expected range: 0.36 0.50
METOP-A IASI 99 radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=0, expected range: 0.34 0.42
airep
SAS901 AIREP Temperature (k) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=93, expected range: 0.00 70.00
AAL44 AIREP Temperature (k) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
amdar
EU6600 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.72
TU0ICUJA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.91
K52ENVZA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.89
OTGEIEBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 1.49
AG4EOGBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.41
5KAEILJA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 1.61
DKHEILJA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.72
2LHYYYRA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-1, expected range: -0.84 0.76
2LHYYYRA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.12 1.23
YC1YQ2ZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-5, expected range: -2.20 1.50
YC1YQ2ZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=5, expected range: 0.00 2.60
3ERG3NZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.32
K52ENVZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.43
SZ2UNXRA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.60
In-Situ measurements
Drifter Buoy Surface pressure (Pa) WMO BLOCK 42 0 0 : OutOfRange
Severely: count(*)=11, expected range: 12.00 12.10
All TEMP Land Report Temperature (k) WMO BLOCK 63 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 63 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 63 70000 101325 Missing
SYNOP Surface pressure (Pa) WMO BLOCK 97 0 0 : OutOfRange
Considerably: rms(fg_depar)=118, expected range: 27.00 97.00
BUOYS
4800271 189 Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=63, expected range: 0.00 50.00
metar
SBGO METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=297, expected range: 0.00 138.00
ship
J8PE3 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)=53, expected range: 0.00 50.00
9V3964 SHIP Report Wind Vector difference (m/s) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=68, expected range: 0.00 50.00
BPBB 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)=95, expected range: 0.00 50.00
A8SZ7 SHIP Report Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=60, expected range: 0.00 50.00
41062 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)=75, expected range: 0.00 70.00
synop
40945 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
08275 170 Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=55, expected range: 0.00 50.00
11129 170 Surface pressure (Pa) : OutOfRange
19 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=99, expected range: 0.00 50.00
16550 170 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=230, expected range: 0.00 153.00
01361 170 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=144, expected range: 0.00 78.00
08271 170 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
94962 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
08159 170 Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
Radiosondes
48855 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.67
70133 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.66

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