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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-03-12 00:00

airs
AQUA AIRS 310 radiances : OutOfRange
10 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.82 -0.78
gpsro
All COSMIC-6 setting RO bending angles Missing
Ozone
NOAA-19 SBUV layer ozone, top pressure 10130 : OutOfRange
3 times in the last 10 days for at least one item
Slightly: stdev_fg_depar_du=6, expected range: 1.70 5.96
amdar
D1WEOHBA 146 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
SJKRTPRA 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)=90, expected range: 0.00 70.00
In-Situ measurements
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 25 0 0 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 68 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 70 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 65 70000 101325 Missing
TEMP Land Report Temperature (k) WMO BLOCK 10 0 40000 : OutOfRange
Slightly: rms(fg_depar)=1, expected range: 0.60 1.26
BUOYS
3301600 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=207, expected range: 0.00 135.00
1701510 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=131, expected range: 0.00 73.00
2101542 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=222, expected range: 0.00 137.00
6200024 Moored Buoy Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
3401532 189 Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=87, expected range: 0.00 70.00
4100597 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
metar
MGPB METAR Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=284, expected range: 0.00 102.00
LICG METAR Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
pilot
42361 PILOT Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=11, expected range: 0.32 6.60
Severely: rms(fg_depar)=14, expected range: 0.33 7.50
ship
SBPQ Automatic SHIP Report Surface pressure (Pa) : OutOfRange
14 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=72, expected range: 0.00 50.00
VRWL4 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)=90, expected range: 0.00 50.00
41049 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=6, expected range: -0.53 4.30
Severely: rms(fg_depar)=7, expected range: 0.00 4.80
VRRB6 SHIP Report Wind Vector difference (m/s) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
BATEU07 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)=87, expected range: 0.00 70.00
46185 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
9V2729 SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
synop
40942 SYNOP Surface pressure (Pa) : OutOfRange
12 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
04950 170 RH2m (%s) : OutOfRange
1 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=68, expected range: 0.00 50.00
04158 170 Surface pressure (Pa) : OutOfRange
17 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=90, expected range: 0.00 50.00
89646 Land Automatic Report 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
28984 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
16470 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
08345 170 Surface pressure (Pa) : OutOfRange
8 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
Radiosondes
42361 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=10, expected range: 1.58 6.90
Severely: rms(fg_depar)=14, expected range: 1.85 7.60
10184 109 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=4, expected range: -0.36 0.78
Severely: rms(fg_depar)=7, expected range: 0.31 1.39
72201 109 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
96935 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.56
59134 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=5, expected range: 0.00 2.50
12425 109 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00