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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-07-13 00:00

airs
AQUA AIRS 17 radiances : OutOfRange
Slightly: avg(fg_depar)=0, expected range: -0.06 0.02
Geostationary CSR
GOES-15 GOES-15 2 radiances : OutOfRange
Considerably: count(*)=15678, expected range: 21000.00 32000.00
GOES-15 GOES-15 3 radiances : OutOfRange
Slightly: count(*)=5225, expected range: 5900.00 13300.00
gpsro
TERRA-SAR-X setting RO bending angles 30-40 km : OutOfRange
Slightly: avg_n_fg_depar=0, expected range: 0.04 0.40
amdar
FESEOHBA 146 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
2AJTEJBA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.19 0.86
HPVWUWBA 146 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=2, expected range: -1.19 1.13
Severely: rms(fg_depar)=3, expected range: 0.00 1.74
ZHTUOGBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.13 1.03
R5OUILBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.22
APEYFEJA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.34
ADSENVRA 146 Temperature (k) 0 40000 : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
amsua
AQUA AMSU-A 8 radiances : OutOfRange
Slightly: stdev(norm_fg_depar)=0, expected range: 0.85 0.94
In-Situ measurements
Land Automatic Report Surface pressure (Pa) WMO BLOCK 78 0 0 : OutOfRange
Severely: count(*)=4, expected range: 6.30 10.10
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 70 0 0 Missing
All Land Automatic Report Surface pressure (Pa) WMO BLOCK 88 0 0 Missing
TEMP Land Report Q (g/kg) WMO BLOCK 13 40000 70000 : OutOfRange
Severely: count(*)=91, expected range: 141.00 210.00
Land Automatic Report Surface pressure (Pa) WMO BLOCK 47 0 0 : OutOfRange
Considerably: count(*)=1594, expected range: 1650.00 1870.00
Land Automatic Report Surface pressure (Pa) WMO BLOCK 40 0 0 : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=36, expected range: 38.00 50.00
BUOYS
48769 Drifter Buoy Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=60, expected range: 0.00 50.00
4601592 189 Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=-405, expected range: -76.00 159.00
Severely: rms(fg_depar)=405, expected range: 0.00 143.00
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
metar
KRPD METAR Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=-237, expected range: -47.00 181.00
Severely: rms(fg_depar)=261, expected range: 0.00 171.00
CWSA METAR Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
ship
LAQN7 SHIP Report Wind Vector difference (m/s) : OutOfRange
5 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=51, expected range: 0.00 50.00
V7GR8 SHIP Report Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=75, expected range: 0.00 50.00
V7DR9 SHIP Report Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=55, expected range: 0.00 50.00
46014 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 75.00
V7NG2 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 75.00
synop
68549 Land Automatic Report Surface pressure (Pa) : OutOfRange
5 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=77, expected range: 0.00 50.00
37785 SYNOP RH2m (%s) : 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
93909 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
Radiosondes
38341 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=-5, expected range: -2.10 2.60
68424 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.10
Severely: avg(fg_depar)=-2, expected range: -0.73 0.93
93997 109 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
42667 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
22522 TEMP Land Report Temperature (k) 70000 101325 : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00