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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

Early delivery 4D-VAR at 2019-01-16 06:00

atms
NPP ATMS radiances 6 : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=6491, expected range: 6900.00 13500.00
Slightly: avg(biascorr)=0, expected range: 0.25 0.37
NPP ATMS radiances 7 : OutOfRange
3 times in the last 10 days for at least one item
Slightly: count(*)=7800, expected range: 8700.00 15100.00
NPP ATMS radiances 8 : OutOfRange
3 times in the last 10 days for at least one item
Slightly: count(*)=8912, expected range: 9600.00 16100.00
NPP ATMS radiances 9 : OutOfRange
Slightly: count(*)=12608, expected range: 13500.00 19900.00
NPP ATMS radiances 22 : OutOfRange
Slightly: count(*)=7991, expected range: 8100.00 12400.00
cris
NOAA-20 CrIS 981 radiances : OutOfRange
15 times in the last 10 days for at least one item
Considerably: count(*)=6635, expected range: 2.00 5203.00
NPP CrIS 21 radiances : OutOfRange
12 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.06 0.18
gpsro
All TANDEM-X rising RO bending angles Missing
All COSMIC-1 setting RO bending angles Missing
All COSMIC-1 rising RO bending angles Missing
All COSMIC-6 rising RO bending angles Missing
iasi
METOP-A IASI 72 radiances : OutOfRange
5 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.45 -0.20
METOP-B IASI 72 radiances : OutOfRange
6 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.32 -0.08
mhs
METOP-A MHS 2 allsky radiances : OutOfRange
Slightly: avg(norm_fg_depar)=0, expected range: -0.01 0.01
ssmis
DMSP-17 SSMIS 9 allsky radiances : OutOfRange
Slightly: count(*)=4847, expected range: 5000.00 14500.00
DMSP-17 SSMIS 10 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=7822, expected range: 8100.00 23000.00
DMSP-17 SSMIS 11 allsky radiances : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=8319, expected range: 8700.00 24000.00
DMSP-18 SSMIS 9 allsky radiances : OutOfRange
Slightly: count(*)=3284, expected range: 3300.00 13500.00
amdar
AU0304 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.61
HZUUILRA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=4, expected range: -1.23 1.17
Severely: rms(fg_depar)=6, expected range: 0.00 1.57
IUTLESBA 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)=100, expected range: 0.00 75.00
Atmospheric Motion Vector
All NOAA-18 IR 70000 110000 Missing
All AQUA IR 0 40000 Missing
METEOSAT-8 VIS2 70000 110000 : OutOfRange
Slightly: stdev(press)=60, expected range: 61.00 89.00
NOAA-15 IR 70000 110000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=1, expected range: 2.00 19.60
In-Situ measurements
Land Automatic Report Surface pressure (Pa) WMO BLOCK 12 0 0 : OutOfRange
3 times in the last 10 days for at least one item
Severely: count(*)=4, expected range: 72.00 158.00
Land Automatic Report Surface pressure (Pa) WMO BLOCK 96 0 0 : OutOfRange
1 times in the last 10 days for at least one item
Severely: count(*)=7, expected range: 0.31 4.10
SYNOP Z (m) WMO BLOCK 15 70000 101325 : OutOfRange
4 times in the last 10 days for at least one item
Severely: count(*)=13, expected range: 3.50 8.90
SYNOP Surface pressure (Pa) WMO BLOCK 33 0 0 : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=200, expected range: 90.00 113.00
All SYNOP RH2m (%s) 04 70000 101325 Missing
All SYNOP RH2m (%s) WMO BLOCK 25 70000 101325 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 48 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 71 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 71 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 71 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 71 70000 101325 Missing
All TEMP Land Report Wind Vector difference (m/s) WMO BLOCK 17 0 40000 Missing
BUOYS
6301670 189 Surface pressure (Pa) : OutOfRange
8 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=74, expected range: 0.00 50.00
7401505 189 Surface pressure (Pa) : OutOfRange
16 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=65, expected range: 0.00 50.00
ship
D5TB2 SHIP Report Wind Vector difference (m/s) : OutOfRange
6 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=73, expected range: 0.00 50.00
VAAZ Automatic SHIP Report Surface pressure (Pa) : OutOfRange
12 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
46036 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
11 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
VRLK3 SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
synop
37801 SYNOP Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=59, expected range: 0.00 50.00
08201 170 Surface pressure (Pa) : OutOfRange
19 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=68, expected range: 0.00 50.00
11325 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 75.00