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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-02-09 12:00

gpsro
COSMIC-1 setting RO bending angles 0-10 km : OutOfRange
Slightly: stddev_n_fg_depar=1, expected range: 0.37 1.04
Ozone
AURA OMI layer ozone, top pressure 1 : OutOfRange
Severely: count(*)=10227, expected range: 17100.00 25000.00
amdar
SL0153 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.88
GPDTYAJA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.07 1.21
P4QXOABA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.30
1B3UOGBA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.70
5GJUOGBA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.20
ZNPYTJBA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.50
MP3IB0JA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.10
3V5VYWJA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 1.92
B0IYBYJA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.10
GJ0XD1RA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.50
E2LIQ2RA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.40
FQHYFERA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.10
XF3UOFRA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.10
YOZYEPRA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.05 1.91
XXBUOGZA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.90
CAVIESZA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.10
ULEEAHRA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
4ICIELZA 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)=100, expected range: 0.00 70.00
Atmospheric Motion Vector
METEOSAT-8 cloudy WV1 0 40000 : OutOfRange
4 times in the last 10 days for at least one item
Slightly: count(*)=8508, expected range: 2000.00 8400.00
METEOSAT-8 cloudy WV2 0 40000 : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=6842, expected range: 2000.00 6700.00
METEOSAT-8 IR3 0 40000 : OutOfRange
3 times in the last 10 days for at least one item
Slightly: count(*)=4856, expected range: 1510.00 4600.00
In-Situ measurements
TEMP Land Report Temperature (k) WMO BLOCK 83 70000 101325 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.55 1.66
All SYNOP Surface pressure (Pa) WMO BLOCK 92 0 0 Missing
All European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 11 0 400 Missing
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 42 0 0 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 54 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 93 0 40000 Missing
SYNOP Surface pressure (Pa) WMO BLOCK 87 0 0 : OutOfRange
Slightly: avg(fg_depar)=111, expected range: -92.00 110.00
SYNOP Surface pressure (Pa) WMO BLOCK 91 0 0 : OutOfRange
Slightly: rms(fg_depar)=148, expected range: 8.00 122.00
TEMP Land Report Temperature (k) WMO BLOCK 87 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: rms(fg_depar)=2, expected range: 0.44 2.50
BUOYS
4802009 189 Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=58, expected range: 0.00 50.00
3401532 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=171, expected range: 0.00 112.00
4401633 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
FTTA METAR Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=394, expected range: 0.00 184.00
VOBL METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=108, expected range: 6.50 72.00
OIBP METAR Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=-329, expected range: -161.00 157.00
Severely: rms(fg_depar)=334, expected range: 0.00 115.00
KBWW METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=244, expected range: 0.00 100.00
ship
D5DS3 SHIP Report Wind Vector difference (m/s) : OutOfRange
7 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=87, expected range: 0.00 50.00
C6SE5 SHIP Report Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=76, expected range: 0.00 50.00
ZDNC6 SHIP Report Surface pressure (Pa) : OutOfRange
9 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=82, expected range: 0.00 50.00
9V9040 SHIP Report Wind Vector difference (m/s) : OutOfRange
7 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
3FAD8 SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
PHET SHIP Report Wind Vector difference (m/s) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=81, expected range: 0.00 70.00
C6TH9 SHIP 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
synop
08271 170 Surface pressure (Pa) : OutOfRange
14 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
5 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=97, expected range: 0.00 50.00
91742 170 Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=-364, expected range: -138.00 118.00
Severely: rms(fg_depar)=427, expected range: 0.00 124.00
91735 170 Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=-478, expected range: -139.00 149.00
Severely: rms(fg_depar)=498, expected range: 0.00 142.00
91736 170 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=371, expected range: 0.00 183.00
62423 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
04373 170 Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=90, expected range: 0.00 70.00
72314 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
13625 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
01086 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
01198 170 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=81, 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)=82, 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)=82, expected range: 0.00 50.00
SOCRATES 111 V10m (m/s) 70000 101325 : OutOfRange
12 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=82, expected range: 0.00 50.00
31088 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=6, expected range: 0.00 3.50
08522 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
83362 TEMP Land Report Temperature (k) 70000 101325 : OutOfRange
Considerably: freq(qc_pge)=87, expected range: 0.00 70.00
72469 TEMP Land Report Temperature (k) 70000 101325 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00