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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-04-12 12:00

airs
AQUA AIRS 1111 radiances : DataMissing
Geostationary CSR
METEOSAT-8 55 2 radiances : OutOfRange
5 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=1, expected range: 0.90 1.57
METEOSAT-8 55 3 radiances : OutOfRange
2 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=1, expected range: 0.65 1.20
iasi
METOP-B IASI 5401 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: 0.21 0.29
METOP-B IASI 5403 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: 0.21 0.29
METOP-B IASI 5405 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: 0.16 0.23
METOP-B IASI 5455 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: 0.38 0.46
mhs
METOP-B MHS 3 allsky radiances : OutOfRange
5 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.38 0.60
METOP-A MHS 3 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.39 0.62
NOAA-18 MHS 3 allsky radiances : OutOfRange
12 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.33 0.54
Ozone
NOAA-19 SBUV layer ozone, top pressure 63940 : OutOfRange
14 times in the last 10 days for at least one item
Considerably: stdev_fg_depar_du=2, expected range: 1.06 2.27
NOAA-19 SBUV layer ozone, top pressure 10130 : OutOfRange
10 times in the last 10 days for at least one item
Slightly: avg_fg_depar_du=2, expected range: -0.75 2.37
Slightly: stdev_fg_depar_du=6, expected range: 2.50 5.96
NOAA-19 SBUV layer ozone, top pressure 25430 : OutOfRange
Slightly: stdev_fg_depar_du=4, expected range: 1.65 4.47
ssmis
DMSP-18 SSMIS 7 allsky radiances : OutOfRange
14 times in the last 10 days for at least one item
Considerably: avg(biascorr)=5, expected range: 5.81 6.30
airep
NAX7012 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=16, expected range: -2.40 9.10
Severely: rms(fg_depar)=19, expected range: 0.00 13.00
KLM643 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=19, expected range: -4.10 10.70
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
NRS7096 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=12, expected range: -1.38 7.00
Severely: rms(fg_depar)=15, expected range: 0.00 9.70
VIR3N AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=9, expected range: 0.38 4.90
Severely: rms(fg_depar)=13, expected range: 0.10 6.00
BAW102 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
LOT45 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
ACA847 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
ACA859 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=88, expected range: 0.00 70.00
amdar
SL0136 146 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=2, expected range: -0.70 0.92
Severely: rms(fg_depar)=4, expected range: 0.00 2.20
TVH1YVJA 146 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=1, expected range: -0.77 0.69
PORENXBA 146 Temperature (k) 40000 70000 : OutOfRange
2 times in the last 10 days for at least one item
Severely: avg(fg_depar)=2, expected range: -0.96 0.67
Severely: rms(fg_depar)=2, expected range: 0.00 1.29
GY0KM3BA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
5Y22YEBA 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)=83, expected range: 0.00 70.00
HQDIHFBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
AIZU0JBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
E3JGN1JA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
EGOZLAJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=72, expected range: 0.00 70.00
GXYV5NJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=87, expected range: 0.00 70.00
VSCYZ5RA 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)=85, expected range: 0.00 70.00
In-Situ measurements
Drifter Buoy Surface pressure (Pa) WMO BLOCK 72 0 0 : OutOfRange
3 times in the last 10 days for at least one item
Severely: count(*)=72, expected range: 37.00 59.00
All SYNOP Surface pressure (Pa) WMO BLOCK 92 0 0 Missing
All AIREP Wind Vector difference (m/s) Asia 40000 70000 Missing
All AIREP Wind Vector difference (m/s) Asia 70000 101325 Missing
All AIREP Wind Vector difference (m/s) Indian Ocean 40000 70000 Missing
All AIREP Wind Vector difference (m/s) Indian Ocean 70000 101325 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 61 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 98 0 40000 Missing
Land Automatic Report Surface pressure (Pa) 06 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=78, expected range: -10.40 62.00
Drifter Buoy Surface pressure (Pa) WMO BLOCK 64 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=213, expected range: 175.00 210.00
TEMP Land Report Temperature (k) WMO BLOCK 98 0 40000 : OutOfRange
Slightly: count(*)=6, expected range: 27.00 460.00
TEMP Land Report Temperature (k) WMO BLOCK 98 70000 101325 : OutOfRange
Slightly: count(*)=3, expected range: 12.70 135.00
BUOYS
5401598 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=203, expected range: 0.00 81.00
5501518 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
SBLB METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=321, expected range: 0.00 100.00
OISL METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=315, expected range: 0.00 135.00
OIMN METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=307, expected range: 0.00 155.00
KMHV METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=234, expected range: 0.00 123.00
ENLA METAR Surface pressure (Pa) : OutOfRange
5 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
ship
46004 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
4 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=71, expected range: 0.00 50.00
ZCDI4 SHIP Report Wind Vector difference (m/s) : OutOfRange
8 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=57, expected range: 0.00 50.00
TBWUK86 SHIP Report Wind Vector difference (m/s) : OutOfRange
1 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=58, expected range: 0.00 50.00
62132 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
DBBH 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
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
synop
40942 SYNOP Surface pressure (Pa) : OutOfRange
19 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
16405 170 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
38836 SYNOP Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
Radiosondes
85442 109 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
47169 109 Q (g/kg) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
97072 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.57
01004 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
71957 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
47158 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.50
04089 TEMP Land Report Q (g/kg) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00