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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

airs
AQUA AIRS 1111 radiances : DataMissing
gpsro
FY-3C setting RO bending angles 0-10 km : OutOfRange
Severely: count(*)=30, expected range: 660.00 1440.00
FY-3C setting RO bending angles 10-20 km : OutOfRange
Severely: count(*)=159, expected range: 4400.00 8500.00
Slightly: avg_n_fg_depar=0, expected range: -0.27 -0.04
FY-3C setting RO bending angles 20-30 km : OutOfRange
Severely: count(*)=117, expected range: 3200.00 6400.00
FY-3C setting RO bending angles 30-40 km : OutOfRange
Severely: count(*)=99, expected range: 2700.00 5400.00
FY-3C setting RO bending angles 50-60 km : OutOfRange
Severely: count(*)=3, expected range: 85.00 160.00
FY-3C rising RO bending angles 10-20 km : OutOfRange
Severely: count(*)=50, expected range: 3200.00 7200.00
Considerably: avg_n_fg_depar=0, expected range: -0.28 -0.01
Considerably: stddev_n_fg_depar=1, expected range: 0.90 1.42
FY-3C rising RO bending angles 20-30 km : OutOfRange
Severely: count(*)=39, expected range: 2400.00 5400.00
FY-3C rising RO bending angles 30-40 km : OutOfRange
Severely: count(*)=33, expected range: 2000.00 4600.00
FY-3C rising RO bending angles 50-60 km : OutOfRange
Severely: count(*)=1, expected range: 62.00 140.00
All TERRA-SAR-X rising RO bending angles Missing
FY-3C rising RO bending angles 0-10 km : DataMissing
amdar
EU1042 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=9, expected range: 0.20 6.40
1NGCELJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=9, expected range: 0.67 5.90
J4QGAHJA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.51
Y0A0JHBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.68
In-Situ measurements
Moored Buoy Surface pressure (Pa) WMO BLOCK 14 0 0 : OutOfRange
Severely: count(*)=20, expected range: 24.00 25.00
Moored Buoy Surface pressure (Pa) WMO BLOCK 15 0 0 : OutOfRange
Severely: count(*)=20, expected range: 24.00 25.00
Moored Buoy Surface pressure (Pa) WMO BLOCK 61 0 0 : OutOfRange
2 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 TEMP Land Report Temperature (k) WMO BLOCK 65 40000 70000 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 65 70000 101325 Missing
All TEMP Land Report Wind Vector difference (m/s) WMO BLOCK 63 0 40000 Missing
All TEMP SHIP Report Temperature (k) Europe 0 40000 Missing
All TEMP SHIP Report Temperature (k) Europe 40000 70000 Missing
All TEMP SHIP Report Temperature (k) Europe 70000 101325 Missing
Moored Buoy Surface pressure (Pa) WMO BLOCK 13 0 0 : OutOfRange
Considerably: count(*)=31, expected range: 33.00 39.00
TEMP Land Report Wind Vector difference (m/s) WMO BLOCK 70 0 40000 : OutOfRange
Considerably: rms(fg_depar)=5, expected range: 1.88 4.30
BUOYS
3301530 189 Surface pressure (Pa) : OutOfRange
8 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=52, expected range: 0.00 50.00
1501511 189 Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=80, expected range: 0.00 75.00
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
OSDI METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=187, expected range: 0.00 125.00
ship
MERFR15 182 Wind Vector difference (m/s) : OutOfRange
Severely: avg(fg_depar)=13, expected range: -1.59 6.50
Severely: rms(fg_depar)=15, expected range: 0.00 7.20
BATFR48 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Severely: avg(fg_depar)=9, expected range: -1.18 4.90
Severely: rms(fg_depar)=10, expected range: 0.00 5.20
BATFR48 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=132, expected range: 0.00 84.00
34002 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=81, expected range: 0.00 75.00
V7BY3 SHIP Report Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=85, expected range: 0.00 75.00
synop
91650 170 Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=56, expected range: 0.00 50.00
85141 SYNOP Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=78, expected range: 0.00 50.00
91573 170 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: avg(fg_depar)=-157, expected range: -65.00 82.00
Severely: rms(fg_depar)=168, expected range: 0.00 89.00
08481 170 Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=90, expected range: 0.00 75.00
76581 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
89817 Land Automatic Report Surface pressure (Pa) : OutOfRange
6 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
16239 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 75.00
Radiosondes
70361 109 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=6, expected range: 0.53 4.20
Severely: rms(fg_depar)=8, expected range: 0.70 4.70
70361 109 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.03 1.66
91366 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=5, expected range: 0.00 3.10
72747 109 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=5, expected range: -0.37 0.60
Severely: rms(fg_depar)=5, expected range: 0.00 2.10
Considerably: freq(qc_pge)=97, expected range: 0.00 75.00
97900 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.99