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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-04-25 00:00

airs
AQUA AIRS 1111 radiances : DataMissing
gpsro
TERRA-SAR-X setting RO bending angles 30-40 km : OutOfRange
Severely: stddev_n_fg_depar=1, expected range: 0.85 1.30
Slightly: avg_n_fg_depar=0, expected range: 0.08 0.36
TERRA-SAR-X setting RO bending angles 40-50 km : OutOfRange
Severely: stddev_n_fg_depar=1, expected range: 0.54 1.00
All TERRA-SAR-X rising RO bending angles Missing
TERRA-SAR-X setting RO bending angles 0-10 km : OutOfRange
Slightly: stddev_n_fg_depar=0, expected range: 0.43 0.88
TANDEM-X rising RO bending angles 30-40 km : OutOfRange
Slightly: stddev_n_fg_depar=0, expected range: 0.75 1.32
COSMIC-1 rising RO bending angles 40-50 km : OutOfRange
2 times in the last 10 days for at least one item
Slightly: avg_n_fg_depar=0, expected range: -0.41 0.57
amdar
EU1734 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=11, expected range: -1.37 7.50
Severely: rms(fg_depar)=16, expected range: 0.00 7.80
JP9ZVYY9 AMDAR Temperature (k) 70000 101325 : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 75.00
In-Situ measurements
Moored Buoy Surface pressure (Pa) WMO BLOCK 61 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=94, expected range: 79.00 88.00
All European Wind Profiler Wind Vector difference (m/s) 01 0 40000 Missing
All European Wind Profiler Wind Vector difference (m/s) 08 0 40000 Missing
All Land Automatic Report RH2m (%s) WMO BLOCK 89 70000 101325 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 38 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 38 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 63 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 63 40000 70000 Missing
BUOYS
4101712 189 Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=179, expected range: -70.00 89.00
Severely: rms(fg_depar)=196, expected range: 0.00 75.00
5501555 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=340, expected range: 0.00 210.00
5501557 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=193, expected range: 0.00 127.00
4101567 189 Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=273, expected range: -5.70 135.00
Severely: rms(fg_depar)=290, expected range: 2.00 136.00
3401508 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=190, expected range: 0.00 103.00
5501549 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=293, expected range: 0.00 138.00
metar
SVMI METAR Surface pressure (Pa) : OutOfRange
15 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=80, expected range: 0.00 50.00
ship
VRIZ5 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)=71, expected range: 0.00 50.00
C6YA7 SHIP Report Surface pressure (Pa) : OutOfRange
5 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=96, expected range: 0.00 50.00
46184 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
6 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
VOLG 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 75.00
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
08352 170 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=582, expected range: 0.00 300.00
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
91573 170 Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=155, expected range: -60.00 73.00
Severely: rms(fg_depar)=175, expected range: 0.00 80.00
08345 170 Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=90, expected range: 0.00 75.00
89817 Land Automatic Report 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 75.00
Radiosondes
94995 109 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
94996 109 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.53