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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-02-18 00:00

airs
AQUA AIRS 248 radiances : OutOfRange
14 times in the last 10 days for at least one item
Considerably: avg(biascorr)=0, expected range: -0.22 -0.04
AQUA AIRS 56 radiances : OutOfRange
6 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.61 -0.26
AQUA AIRS 78 radiances : OutOfRange
11 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -1.09 -0.80
AQUA AIRS 79 radiances : OutOfRange
10 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.81 -0.57
AQUA AIRS 83 radiances : OutOfRange
5 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.42 -0.13
AQUA AIRS 84 radiances : OutOfRange
9 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.40 -0.15
AQUA AIRS 86 radiances : OutOfRange
5 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.10 0.12
cris
NPP CrIS 31 radiances : OutOfRange
4 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.73 -0.45
iasi
METOP-B IASI 95 radiances : OutOfRange
7 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -1.01 -0.68
METOP-B IASI 101 radiances : OutOfRange
3 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.05 0.19
METOP-B IASI 303 radiances : OutOfRange
3 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: 0.04 0.31
METOP-A IASI 95 radiances : OutOfRange
7 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -1.11 -0.78
METOP-A IASI 101 radiances : OutOfRange
8 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.18 0.05
Ozone
METOP-B GOME-2 layer ozone, top pressure 1 : OutOfRange
Slightly: count(*)=48782, expected range: 49000.00 60000.00
ssmis
DMSP-18 SSMIS 3 allsky radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: 0.15 0.51
DMSP-18 SSMIS 4 allsky radiances : OutOfRange
3 times in the last 10 days for at least one item
Slightly: avg(biascorr)=-1, expected range: -1.35 -0.81
amdar
QUHHL5RA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=10, expected range: -0.65 6.10
Severely: rms(fg_depar)=12, expected range: 0.00 7.00
QUHHL5RA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.74
QA2EOFZA 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
SVWUOFJA 146 Q (g/kg) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=0, expected range: -0.00 0.00
QUHHL5RA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.39
LAN703 AMDAR Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
LAN705 AMDAR 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 70.00
BAW248 AMDAR Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=77, expected range: 0.00 70.00
CWWWAIBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
In-Situ measurements
All Moored Buoy Surface pressure (Pa) WMO BLOCK 23 0 0 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 68 0 40000 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 93 0 40000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 65 70000 101325 Missing
Drifter Buoy Surface pressure (Pa) WMO BLOCK 46 0 0 : OutOfRange
Slightly: rms(fg_depar)=110, expected range: 23.00 109.00
TEMP Land Report Temperature (k) WMO BLOCK 97 40000 70000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(fg_depar)=0, expected range: -0.58 0.82
Slightly: rms(fg_depar)=1, expected range: 0.12 1.60
BUOYS
1300872 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=247, expected range: 0.00 160.00
2301572 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
ship
VRRI4 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)=72, expected range: 0.00 50.00
WDB3161 SHIP Report Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=95, expected range: 0.00 50.00
46002 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=197, expected range: 0.00 95.00
ZCDI4 SHIP Report 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 70.00
synop
04158 170 Surface pressure (Pa) : OutOfRange
18 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=86, expected range: 0.00 50.00
04950 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=85, expected range: 0.00 70.00
04160 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=71, expected range: 0.00 70.00
71660 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
71412 170 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
04109 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=87, expected range: 0.00 70.00
Radiosondes
SOCR3 TEMP SHIP Report U10m (m/s) 70000 101325 : OutOfRange
9 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=55, expected range: 0.00 50.00
SOCR3 TEMP SHIP Report V10m (m/s) 70000 101325 : OutOfRange
9 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=55, expected range: 0.00 50.00
SOCRATES 111 U10m (m/s) 70000 101325 : OutOfRange
9 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=54, expected range: 0.00 50.00
SOCRATES 111 V10m (m/s) 70000 101325 : OutOfRange
9 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=54, expected range: 0.00 50.00
70361 109 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.30
41112 TEMP Land Report Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
42299 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=6, expected range: 0.00 4.10