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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-03-13 00:00

airs
AQUA AIRS 310 radiances : OutOfRange
12 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
iasi
METOP-A IASI 249 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: 0.02 0.06
Ozone
NOAA-19 SBUV layer ozone, top pressure 10130 : OutOfRange
4 times in the last 10 days for at least one item
Slightly: stdev_fg_depar_du=6, expected range: 1.69 5.96
amdar
POP0JHBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely_persistent: freq(qc_pge)=93, expected range: 0.00 50.00
YUJVMUJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=7, expected range: 0.65 4.90
Severely: rms(fg_depar)=9, expected range: 0.62 5.80
JULUIEJA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.08 1.09
DWJEOFZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.24 0.97
In-Situ measurements
TEMP Land Report Temperature (k) WMO BLOCK 45 0 40000 : OutOfRange
Severely: count(*)=155, expected range: -3.20 74.00
TEMP Land Report Temperature (k) WMO BLOCK 45 40000 70000 : OutOfRange
Severely: count(*)=86, expected range: -9.90 34.00
TEMP Land Report Temperature (k) WMO BLOCK 45 70000 101325 : OutOfRange
Severely: count(*)=88, expected range: 1.80 19.00
All European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 11 0 400 Missing
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 25 0 0 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 45 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 62 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 62 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 62 70000 101325 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 65 70000 101325 Missing
TEMP Land Report Wind Vector difference (m/s) WMO BLOCK 71 0 40000 : OutOfRange
Considerably: count(*)=3787, expected range: 1160.00 3200.00
PILOT Wind Vector difference (m/s) WMO BLOCK 71 0 40000 : OutOfRange
Slightly: count(*)=108, expected range: 220.00 1200.00
TEMP Land Report Temperature (k) 07 0 40000 : OutOfRange
Slightly: count(*)=637, expected range: 660.00 950.00
TEMP Land Report Temperature (k) WMO BLOCK 71 0 40000 : OutOfRange
Slightly: count(*)=3842, expected range: 1690.00 3700.00
TEMP Land Report Temperature (k) WMO BLOCK 71 70000 101325 : OutOfRange
Slightly: count(*)=842, expected range: 420.00 820.00
TEMP Land Report Wind Vector difference (m/s) 07 0 40000 : OutOfRange
Slightly: rms(fg_depar)=7, expected range: 1.34 6.40
BUOYS
6301555 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=459, expected range: 0.00 290.00
1700518 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=161, expected range: 0.00 105.00
3301530 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
SBLO METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=232, expected range: 0.00 150.00
ship
SBPQ Automatic SHIP Report Surface pressure (Pa) : OutOfRange
16 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=82, expected range: 0.00 50.00
BATEU07 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)=80, expected range: 0.00 70.00
C6SE3 SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
ZCDI4 SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
VTFG Automatic SHIP Report Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
synop
63402 SYNOP Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
12510 170 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
30493 170 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 70.00
04154 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
Radiosondes
17516 109 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=3, expected range: -0.94 0.89
Severely: rms(fg_depar)=4, expected range: 0.00 2.60
94996 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
06011 109 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=3, expected range: -1.09 1.13