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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-03-07 12:00

airs
AQUA AIRS 1206 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.10 -0.04
gpsro
METOP-A rising RO bending angles 0-10 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=7496, expected range: 3900.00 6900.00
METOP-A rising RO bending angles 10-20 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=7935, expected range: 4100.00 7300.00
METOP-A rising RO bending angles 20-30 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=5845, expected range: 3000.00 5400.00
METOP-A rising RO bending angles 30-40 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=4925, expected range: 2600.00 4500.00
METOP-A rising RO bending angles 40-50 km : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=4938, expected range: 2500.00 4500.00
Ozone
NOAA-19 SBUV layer ozone, top pressure 1 : OutOfRange
2 times in the last 10 days for at least one item
Slightly: stdev_fg_depar_du=0, expected range: 0.00 0.01
ssmis
DMSP-18 SSMIS 3 allsky radiances : OutOfRange
Slightly: avg(norm_fg_depar)=0, expected range: -0.01 0.01
airep
UAL863 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
amdar
DIJX1DJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
2 times in the last 10 days for at least one item
Severely: avg(fg_depar)=35, expected range: -2.00 8.50
Severely: rms(fg_depar)=37, expected range: 0.00 9.10
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
Z54SSIZA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=10, expected range: -0.30 6.40
XWGY0OZA 146 Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
T0QKJGJA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.57
ABZENVRA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=-2, expected range: -0.82 0.81
Severely: rms(fg_depar)=2, expected range: 0.00 1.18
W4IUNXRA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.60
In-Situ measurements
Drifter Buoy Surface pressure (Pa) WMO BLOCK 25 0 0 : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=2, expected range: 7.50 15.80
All European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 11 0 400 Missing
European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 94 0 400 : OutOfRange
1 times in the last 10 days for at least one item
Considerably: count(*)=975, expected range: 1200.00 2000.00
TEMP Land Report Temperature (k) WMO BLOCK 35 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: rms(fg_depar)=2, expected range: 0.27 1.89
TEMP Land Report Wind Vector difference (m/s) WMO BLOCK 35 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg(fg_depar)=4, expected range: 1.46 4.50
Slightly: rms(fg_depar)=5, expected range: 1.23 5.70
BUOYS
3101503 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=164, expected range: 0.00 95.00
2301536 189 Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Severely: rms(fg_depar)=433, expected range: 0.00 111.00
3401537 189 Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=-332, expected range: -158.00 137.00
Severely: rms(fg_depar)=337, expected range: 0.00 181.00
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
3401535 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
2301556 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=72, expected range: 0.00 70.00
ship
VRWL4 SHIP Report Wind Vector difference (m/s) : OutOfRange
9 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=88, expected range: 0.00 50.00
MERFR03 182 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 70.00
44150 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
CFL24 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
7 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
VRXL8 SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
C6VG7 SHIP Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
2IYH6 SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
PHET SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
synop
40942 SYNOP Surface pressure (Pa) : 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
04158 170 Surface pressure (Pa) : OutOfRange
16 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=86, expected range: 0.00 50.00
89807 Land Automatic Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=77, expected range: 0.00 70.00
47189 Land Automatic Report Surface pressure (Pa) : OutOfRange
5 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
76581 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
12510 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=85, expected range: 0.00 70.00
93420 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
Radiosondes
78970 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=11, expected range: 0.68 6.20
Severely: rms(fg_depar)=12, expected range: 0.87 6.90
76654 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=8, expected range: 1.51 6.20
Severely: rms(fg_depar)=10, expected range: 1.63 7.30
01206 109 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.80
35229 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.06 1.76
68538 109 Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00