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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-02-06 00:00

airs
AQUA AIRS 56 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.57 0.63
AQUA AIRS 672 radiances : OutOfRange
Slightly: avg(fg_depar)=0, expected range: -0.04 0.07
AQUA AIRS 1301 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.21 0.26
AQUA AIRS 1939 radiances : OutOfRange
Slightly: avg(biascorr)=-1, expected range: -1.49 -1.35
AQUA AIRS 2106 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.16 -0.10
92 AQUA AIRS 1 radiances have reduced counts (see example): OutOfRange
Slightly: count(*)=8988, expected range: 12100.00 26000.00
gpsro
COSMIC-6 setting RO bending angles 10-20 km : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg_n_fg_depar=0, expected range: -0.19 0.01
All COSMIC-6 rising RO bending angles Missing
iasi
390 METOP-A IASI 16 radiances have reduced counts (see example): OutOfRange
Severely: count(*)=10507, expected range: 14500.00 17600.00
amdar
EU1320 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=14, expected range: 1.62 4.90
Severely: rms(fg_depar)=15, expected range: 1.68 5.70
E3FL3ERA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=13, expected range: -0.29 8.50
0KJ0MMRA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
In-Situ measurements
All TEMP Land Report Temperature (k) WMO BLOCK 65 70000 101325 Missing
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 42 0 0 Missing
All European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 11 0 400 Missing
All Japanese Wind Profiler Wind Vector difference (m/s) WMO BLOCK 47 0 400 Missing
TEMP Land Report Temperature (k) WMO BLOCK 88 70000 101325 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=169, expected range: 71.00 92.00
TEMP Land Report Temperature (k) WMO BLOCK 88 40000 70000 : OutOfRange
Severely: count(*)=178, expected range: 81.00 93.00
TEMP Land Report Temperature (k) WMO BLOCK 13 70000 101325 : OutOfRange
Severely: count(*)=161, expected range: 62.00 123.00
TEMP Land Report Temperature (k) WMO BLOCK 13 40000 70000 : OutOfRange
Severely: count(*)=173, expected range: 81.00 107.00
TEMP Land Report Temperature (k) WMO BLOCK 13 0 40000 : OutOfRange
Severely: count(*)=326, expected range: 135.00 240.00
SHIP Surface pressure (Pa) Europe 1 1 : OutOfRange
Considerably: count(*)=1959, expected range: 2100.00 2600.00
TEMP Land Report Temperature (k) WMO BLOCK 89 0 40000 : OutOfRange
Considerably: rms(fg_depar)=1, expected range: 0.56 1.37
PILOT Wind Vector difference (m/s) WMO BLOCK 97 0 40000 : OutOfRange
Slightly: count(*)=78, expected range: -18.30 77.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 44 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: rms(fg_depar)=109, expected range: 29.00 106.00
BUOYS
4401551 189 Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=405, expected range: -81.00 144.00
Severely: rms(fg_depar)=419, expected range: 0.00 155.00
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
4401633 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=319, expected range: 0.00 148.00
6501553 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=184, expected range: 0.00 116.00
metar
UTAK METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=305, expected range: 0.00 175.00
UTNU METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=238, expected range: 0.00 124.00
pilot
42182 PILOT Wind Vector difference (m/s) 0 40000 : OutOfRange
6 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=59, expected range: 0.00 50.00
ship
ZDNC6 SHIP Report Surface pressure (Pa) : OutOfRange
5 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
VRPY7 SHIP Report Surface pressure (Pa) : OutOfRange
5 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=61, expected range: 0.00 50.00
CGTF Automatic SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=91, expected range: 0.00 70.00
synop
71021 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
38413 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
24136 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
37749 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
Radiosondes
SOCR3 TEMP SHIP Report U10m (m/s) 70000 101325 : OutOfRange
14 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=87, expected range: 0.00 50.00
SOCR3 TEMP SHIP Report V10m (m/s) 70000 101325 : OutOfRange
14 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=87, expected range: 0.00 50.00
SOCRATES 111 U10m (m/s) 70000 101325 : OutOfRange
9 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=88, expected range: 0.00 50.00
SOCRATES 111 V10m (m/s) 70000 101325 : OutOfRange
9 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=88, expected range: 0.00 50.00
04270 109 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=-2, expected range: -0.92 1.05
89592 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=5, expected range: 0.00 2.40
68994 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=6, expected range: 0.00 2.50
91165 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=5, expected range: 0.34 3.00
40766 TEMP Land Report 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
29572 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00