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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-11-09 00:00

airs
AQUA AIRS 1644 radiances : OutOfRange
Slightly: count(*)=9095, expected range: 420.00 8700.00
cris
NOAA-20 CrIS 69 radiances : OutOfRange
2 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.22 0.25
NPP CrIS 493 radiances : OutOfRange
8 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.03 -0.01
NPP CrIS 845 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.17 -0.09
NPP CrIS 861 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.04 0.07
NPP CrIS 917 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.09 0.01
NPP CrIS 1037 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.19 -0.08
NPP CrIS 1125 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: 0.20 0.34
gpsro
All COSMIC-6 setting RO bending angles Missing
METOP-A rising RO bending angles 0-10 km : OutOfRange
Slightly: avg_n_fg_depar=0, expected range: -0.11 0.05
iasi
198 METOP-A IASI 16 radiances have reduced counts (see example): OutOfRange
Severely: count(*)=19770, expected range: 22000.00 24000.00
mhs
All NOAA-18 MHS allsky radiances Missing
METOP-A MHS 3 allsky radiances : OutOfRange
Severely: count(*)=42970, expected range: 46000.00 50000.00
METOP-A MHS 4 allsky radiances : OutOfRange
Severely: count(*)=40731, expected range: 44000.00 48000.00
METOP-A MHS 1 allsky radiances : OutOfRange
Slightly: count(*)=25369, expected range: 26058.00 30000.00
METOP-A MHS 5 allsky radiances : OutOfRange
Slightly: count(*)=25169, expected range: 25644.00 30000.00
Ozone
NOAA-19 SBUV layer ozone, top pressure 2540 : OutOfRange
Slightly: stdev_fg_depar_du=6, expected range: 1.38 6.53
ssmis
DMSP-18 SSMIS 2 allsky radiances : OutOfRange
Slightly: count(*)=9901, expected range: 10000.00 18200.00
DMSP-18 SSMIS 3 allsky radiances : OutOfRange
Slightly: count(*)=11653, expected range: 11700.00 23000.00
amdar
JP9ZX649 AMDAR Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=20, expected range: -1.48 7.00
Severely: rms(fg_depar)=32, expected range: 0.00 8.00
R0OUOFRA 146 Q (g/kg) 0 40000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
HNMHLIJA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.58
R0OUOFRA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.35
EU0858 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.78
JRUGUURA 146 Temperature (k) 0 40000 : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
LEKUNVZA 146 Temperature (k) 0 40000 : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=90, expected range: 0.00 75.00
EU0903 146 Temperature (k) 40000 70000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
In-Situ measurements
All Land Automatic Report RH2m (%s) 02 70000 101325 Missing
All Land Automatic Report RH2m (%s) WMO BLOCK 40 70000 101325 Missing
All SYNOP RH2m (%s) 04 70000 101325 Missing
All SYNOP RH2m (%s) WMO BLOCK 32 70000 101325 Missing
Drifter Buoy Surface pressure (Pa) WMO BLOCK 31 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=232, expected range: 127.00 192.00
All PILOT Wind Vector difference (m/s) WMO BLOCK 64 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 70 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 87 0 40000 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
0022959 189 Surface pressure (Pa) : OutOfRange
15 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=89, expected range: 0.00 50.00
21708 Drifter Buoy Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
4601612 189 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 75.00
4601633 189 Surface pressure (Pa) : OutOfRange
5 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00
4700546 189 Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=91, expected range: 0.00 75.00
metar
SBSY METAR Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
pilot
42971 PILOT Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=10, expected range: 1.15 5.10
Severely: rms(fg_depar)=12, expected range: 1.26 6.00
ship
VRKQ5 SHIP Report Wind Vector difference (m/s) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=65, expected range: 0.00 50.00
DSQL7 SHIP Report Wind Vector difference (m/s) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
C6SA3 SHIP Report Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=95, expected range: 0.00 50.00
WDC6644 SHIP Report Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=70, expected range: 0.00 50.00
VRCR9 SHIP Report Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=61, expected range: 0.00 50.00
46035 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Severely: avg(fg_depar)=10, expected range: -0.35 4.00
Severely: rms(fg_depar)=13, expected range: 0.00 4.50
41044 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=161, expected range: 13.80 101.00
BATFR47 SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=87, expected range: 0.00 75.00
synop
56106 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 75.00
Radiosondes
42971 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=8, expected range: 2.00 5.80
Severely: rms(fg_depar)=9, expected range: 2.20 6.70
17064 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.67
47138 109 Temperature (k) 40000 70000 : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=2, expected range: -0.99 0.94
Severely: rms(fg_depar)=3, expected range: 0.00 1.25