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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2017-03-29 12:00

airs
AQUA AIRS 2333 radiances : DataMissing
213 AQUA AIRS 1 radiances have reduced counts (see example): OutOfRange
Severely: count(*)=15768, expected range: 18900.00 21000.00
AQUA AIRS 310 radiances : OutOfRange
19 times in the last 10 days for at least one item
Considerably: avg(biascorr)=0, expected range: -0.76 -0.69
AQUA AIRS 262 radiances : OutOfRange
13 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.59 -0.55
AQUA AIRS 267 radiances : OutOfRange
7 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.56 -0.51
AQUA AIRS 295 radiances : OutOfRange
2 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.51 -0.47
AQUA AIRS 305 radiances : OutOfRange
6 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.66 -0.61
atms
NPP ATMS radiances 2 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: count(*)=10272, expected range: 11200.00 14800.00
NPP ATMS radiances 1 : OutOfRange
12 times in the last 10 days for at least one item
Slightly: avg(biascorr)=1, expected range: 0.40 1.00
gpsro
All TERRA-SAR-X setting RO bending angles Missing
All COSMIC-5 setting RO bending angles Missing
All COSMIC-5 rising RO bending angles Missing
All COSMIC-6 setting RO bending angles Missing
ssmis
DMSP-18 SSMIS 1 allsky radiances : OutOfRange
Considerably: count(*)=7692, expected range: 9600.00 16300.00
DMSP-18 SSMIS 7 allsky radiances : OutOfRange
4 times in the last 10 days for at least one item
Considerably: avg(biascorr)=5, expected range: 5.52 6.40
Slightly: count(*)=14295, expected range: 17000.00 31000.00
DMSP-18 SSMIS 15 allsky radiances : OutOfRange
Considerably: count(*)=10351, expected range: 12700.00 22000.00
DMSP-18 SSMIS 16 allsky radiances : OutOfRange
Considerably: count(*)=10432, expected range: 12900.00 22000.00
DMSP-18 SSMIS 17 allsky radiances : OutOfRange
Considerably: count(*)=10490, expected range: 13000.00 23000.00
DMSP-17 SSMIS 3 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(biascorr)=-16, expected range: -16.20 -15.30
DMSP-18 SSMIS 4 allsky radiances : OutOfRange
Slightly: count(*)=12355, expected range: 15300.00 31000.00
DMSP-18 SSMIS 5 allsky radiances : OutOfRange
Slightly: count(*)=12261, expected range: 15400.00 31000.00
DMSP-18 SSMIS 6 allsky radiances : OutOfRange
Slightly: count(*)=14343, expected range: 17100.00 31000.00
DMSP-18 SSMIS 9 allsky radiances : OutOfRange
Slightly: count(*)=10544, expected range: 12900.00 23000.00
DMSP-18 SSMIS 10 allsky radiances : OutOfRange
Slightly: count(*)=14193, expected range: 17000.00 31000.00
DMSP-18 SSMIS 11 allsky radiances : OutOfRange
Slightly: count(*)=14190, expected range: 16900.00 31000.00
Slightly: avg(biascorr)=0, expected range: -0.11 0.06
DMSP-18 SSMIS 12 allsky radiances : OutOfRange
Slightly: count(*)=10671, expected range: 13000.00 23000.00
DMSP-18 SSMIS 13 allsky radiances : OutOfRange
Slightly: count(*)=10655, expected range: 13100.00 23000.00
DMSP-18 SSMIS 14 allsky radiances : OutOfRange
Slightly: count(*)=10585, expected range: 13000.00 23000.00
DMSP-18 SSMIS 18 allsky radiances : OutOfRange
Slightly: count(*)=10520, expected range: 13000.00 23000.00
airep
EIN123 AIREP Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=6, expected range: -2.70 2.30
Severely: rms(fg_depar)=6, expected range: 0.06 1.99
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
BAW191 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
amdar
0PTXL5JA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=11, expected range: 0.00 7.30
5JOXL5JA 146 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
AU0138 AMDAR Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 1.76
AU0119 AMDAR Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.68
ONYEOGJA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.80
EU0537 146 Temperature (k) 70000 101325 : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=9, expected range: -2.20 1.68
Severely: rms(fg_depar)=9, expected range: 0.00 2.80
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
In-Situ measurements
All PILOT Wind Vector difference (m/s) WMO BLOCK 67 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 93 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 38 70000 101325 Missing
TEMP Land Report Temperature (k) WMO BLOCK 96 70000 101325 : OutOfRange
Considerably: rms(fg_depar)=2, expected range: 0.52 1.68
TEMP Land Report Temperature (k) WMO BLOCK 34 0 40000 : OutOfRange
Slightly: rms(fg_depar)=3, expected range: 0.38 2.90
TEMP Land Report Temperature (k) WMO BLOCK 80 0 40000 : OutOfRange
Slightly: rms(fg_depar)=3, expected range: 0.00 3.60
TEMP Land Report Temperature (k) WMO BLOCK 94 40000 70000 : OutOfRange
Slightly: rms(fg_depar)=1, expected range: 0.42 1.09
BUOYS
1600530 189 Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=278, expected range: -62.00 136.00
Severely: rms(fg_depar)=330, expected range: 0.00 131.00
1500501 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=128, expected range: 0.00 85.00
2100854 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
3100517 189 Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
metar
DAAS METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=283, expected range: 0.00 100.00
ship
46132 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
8 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
PCHM SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
VAAZ Automatic SHIP Report Surface pressure (Pa) : OutOfRange
8 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=91, expected range: 0.00 70.00
synop
63680 SYNOP Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
63331 SYNOP Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=77, expected range: 0.00 50.00
47022 SYNOP Surface pressure (Pa) : OutOfRange
17 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=82, expected range: 0.00 50.00
71533 170 Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=79, expected range: 0.00 50.00
71093 170 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
48415 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
Radiosondes
32618 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=13, expected range: 0.05 6.70
72440 TEMP Land Report Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
DBLK 111 Q (g/kg) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
35394 TEMP Land Report Q (g/kg) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
DBLK 111 Q (g/kg) 40000 70000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=0, expected range: 0.00 0.00

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