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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-04-16 12:00

Geostationary CSR
METEOSAT-8 55 3 radiances : OutOfRange
7 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=1, expected range: 0.62 1.07
gpsro
COSMIC-1 rising RO bending angles 30-40 km : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg_n_fg_depar=0, expected range: -0.08 0.50
Slightly: stddev_n_fg_depar=1, expected range: 0.45 1.28
COSMIC-1 rising RO bending angles 40-50 km : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg_n_fg_depar=0, expected range: -0.14 0.29
Considerably: stddev_n_fg_depar=1, expected range: 0.01 1.05
All TERRA-SAR-X setting RO bending angles Missing
All TANDEM-X rising RO bending angles Missing
All COSMIC-6 rising RO bending angles Missing
COSMIC-1 setting RO bending angles 40-50 km : OutOfRange
1 times in the last 10 days for at least one item
Considerably: avg_n_fg_depar=0, expected range: -0.13 0.28
COSMIC-1 rising RO bending angles 20-30 km : OutOfRange
1 times in the last 10 days for at least one item
Considerably: avg_n_fg_depar=0, expected range: -0.33 0.22
airep
NRS7093 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
UAL984 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
amdar
WIKVGCBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.61
1CAUOGBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.24
EI0EOHBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-1, expected range: -0.78 0.45
MMVYSOBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.28
G3JKO3RA 146 Temperature (k) 40000 70000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=-3, expected range: -1.13 1.15
Severely: rms(fg_depar)=3, expected range: 0.00 2.20
J0WENXRA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.31
Y31HL5ZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.60
BAILYSZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.50
EU6634 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.10
G3JKO3RA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.70
IFTEOFRA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=-4, expected range: -1.46 1.39
Severely: rms(fg_depar)=4, expected range: 0.00 2.30
CR4UOFZA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=-4, expected range: -1.62 1.44
Severely: rms(fg_depar)=4, expected range: 0.00 2.40
WJVKYLZA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.10
HOCYFXZA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=-4, expected range: -1.70 1.41
Severely: rms(fg_depar)=5, expected range: 0.00 2.40
P0RTP1JA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
FG5IQ1RA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=90, expected range: 0.00 70.00
ZTEIN5RA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
VSCYZ5RA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=87, expected range: 0.00 70.00
Atmospheric Motion Vector
All GOES-15 VIS1 70000 110000 Missing
In-Situ measurements
All European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 11 0 400 Missing
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 15 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 Moored Buoy Surface pressure (Pa) WMO BLOCK 28 0 0 Missing
AMDAR Temperature (k) North Atlantic 40000 70000 : OutOfRange
Considerably: rms(fg_depar)=1, expected range: 0.41 0.87
SYNOP Surface pressure (Pa) WMO BLOCK 74 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=1, expected range: 1.16 2.80
AIREP Wind Vector difference (m/s) Asia 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=18, expected range: 57.00 480.00
AMDAR Wind Vector difference (m/s) North Atlantic 40000 70000 : OutOfRange
Slightly: avg(fg_depar)=3, expected range: 1.27 3.70
Slightly: rms(fg_depar)=4, expected range: 1.52 4.40
BUOYS
3300574 189 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
ship
46004 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
14 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=69, expected range: 0.00 50.00
46100 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
5 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 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
synop
40942 SYNOP Surface pressure (Pa) : OutOfRange
32 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
Radiosondes
91765 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.70
74389 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
42369 TEMP Land Report Temperature (k) 70000 101325 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00