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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-04-15 00:00

airs
AQUA AIRS 76 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.46 0.66
AQUA AIRS 77 radiances : OutOfRange
2 times in the last 10 days for at least one item
Slightly: stdev(fg_depar)=0, expected range: 0.44 0.63
cris
NPP CrIS 129 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.19 -0.16
gpsro
COSMIC-1 rising RO bending angles 30-40 km : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg_n_fg_depar=1, expected range: 0.05 0.42
Considerably: stddev_n_fg_depar=0, expected range: 0.58 1.18
COSMIC-1 rising RO bending angles 40-50 km : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg_n_fg_depar=1, expected range: -0.07 0.25
All TERRA-SAR-X setting RO bending angles Missing
All TANDEM-X rising RO bending angles Missing
All COSMIC-1 setting RO bending angles Missing
COSMIC-6 rising RO bending angles 20-30 km : OutOfRange
1 times in the last 10 days for at least one item
Considerably: avg_n_fg_depar=0, expected range: -0.17 0.07
COSMIC-1 rising RO bending angles 20-30 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg_n_fg_depar=0, expected range: -0.23 0.13
Slightly: stddev_n_fg_depar=0, expected range: 0.66 1.26
COSMIC-6 rising RO bending angles 0-10 km : OutOfRange
Slightly: stddev_n_fg_depar=0, expected range: 0.42 0.93
mhs
METOP-B MHS 3 allsky radiances : OutOfRange
9 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.40 0.60
NOAA-18 MHS 3 allsky radiances : OutOfRange
16 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.33 0.54
Ozone
METOP-B GOME-2 layer ozone, top pressure 1 : OutOfRange
11 times in the last 10 days for at least one item
Severely: stdev_fg_depar_du=6, expected range: 5.20 5.83
AURA OMI layer ozone, top pressure 1 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=2988, expected range: 17000.00 25000.00
Considerably: avg_fg_depar_du=-2, expected range: -1.60 1.06
Slightly: avg_biascorr_du=-8, expected range: -8.20 -5.40
NOAA-19 SBUV layer ozone, top pressure 63940 : OutOfRange
17 times in the last 10 days for at least one item
Slightly: stdev_fg_depar_du=2, expected range: 1.29 2.27
ssmis
DMSP-18 SSMIS 7 allsky radiances : OutOfRange
17 times in the last 10 days for at least one item
Slightly: avg(biascorr)=5, expected range: 5.81 6.20
DMSP-18 SSMIS 11 allsky radiances : OutOfRange
4 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.13 0.04
airep
NAX7191 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=73, expected range: 0.00 70.00
NRS7093 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
ELY027 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=76, expected range: 0.00 70.00
AAL99 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=85, expected range: 0.00 70.00
amdar
QNVIIBRA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=15, expected range: -1.43 7.90
Severely: rms(fg_depar)=17, expected range: 0.00 10.20
HINEOFJA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-1, expected range: -0.75 0.87
Severely: rms(fg_depar)=2, expected range: 0.00 1.48
R2M0JGJA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.51
V4BEOFRA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-1, expected range: -0.85 0.77
T3NUNXRA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-2, expected range: -1.13 0.86
Severely: rms(fg_depar)=3, expected range: 0.00 1.39
14XXL5ZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-1, expected range: -0.59 0.56
Severely: rms(fg_depar)=2, expected range: 0.00 1.36
UGVEOFZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-1, expected range: -0.83 0.84
AU0122 AMDAR Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.23 1.48
0YDWUWJA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.10
amsua
AQUA AMSU-A 8 radiances : OutOfRange
Slightly: avg(norm_fg_depar)=0, expected range: 0.04 0.32
In-Situ measurements
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 Moored Buoy Surface pressure (Pa) WMO BLOCK 28 0 0 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 70 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 65 70000 101325 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 73 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 73 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 73 70000 101325 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 88 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 88 70000 101325 Missing
Land Automatic Report Surface pressure (Pa) WMO BLOCK 45 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: rms(fg_depar)=128, expected range: 0.00 117.00
TEMP Land Report Temperature (k) WMO BLOCK 74 40000 70000 : OutOfRange
Slightly: avg(fg_depar)=0, expected range: -0.58 0.80
Slightly: rms(fg_depar)=1, expected range: 0.00 1.53
TEMP Land Report Wind Vector difference (m/s) WMO BLOCK 71 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(fg_depar)=4, expected range: 3.00 4.00
Slightly: rms(fg_depar)=4, expected range: 3.50 4.70
BUOYS
7201500 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=267, expected range: 0.00 172.00
5501507 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=162, expected range: 0.00 100.00
1401718 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=236, expected range: 0.00 146.00
4601662 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=81, expected range: 0.00 70.00
5401592 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
metar
MMCE METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=168, expected range: 0.00 112.00
KBGF METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=192, expected range: 0.00 125.00
KLUG METAR Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=184, expected range: 0.00 110.00
SAAR METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=323, expected range: 0.00 189.00
FNSA METAR Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
SVMI METAR 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
ship
VROB9 SHIP Report Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=54, expected range: 0.00 50.00
WTDH SHIP Report Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=228, expected range: 0.00 117.00
V7ZZ5 SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=81, expected range: 0.00 70.00
CGBN Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
VRRI5 SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=77, expected range: 0.00 70.00
VTFG Automatic SHIP Report Surface pressure (Pa) : OutOfRange
9 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
synop
47581 Land Automatic Report Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=184, expected range: 0.00 122.00
86221 SYNOP 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
93831 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
29393 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
67009 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
Radiosondes
59758 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=5, expected range: 0.54 3.90
Severely: rms(fg_depar)=7, expected range: 0.57 4.40
42182 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=7, expected range: -0.83 1.40
Severely: rms(fg_depar)=11, expected range: 0.00 3.10
5QPW8XG 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
17351 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00