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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2017-08-21 12:00

airs
AQUA AIRS 52 radiances : OutOfRange
4 times in the last 10 days for at least one item
Considerably: avg(biascorr)=0, expected range: -0.09 -0.03
AQUA AIRS 138 radiances : OutOfRange
Considerably: avg(biascorr)=0, expected range: -0.07 -0.01
8 AQUA AIRS 6 radiances have reduced counts (see example): OutOfRange
Considerably: count(*)=16083, expected range: 17400.00 22000.00
AQUA AIRS 6 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.21 -0.13
AQUA AIRS 108 radiances : OutOfRange
7 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.14 -0.10
AQUA AIRS 144 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.23 -0.18
AQUA AIRS 1003 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.26 0.35
AQUA AIRS 1012 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.26 0.35
AQUA AIRS 1024 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.25 0.33
AQUA AIRS 1095 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.29 0.39
AQUA AIRS 1138 radiances : OutOfRange
Slightly: stdev(fg_depar)=0, expected range: 0.24 0.30
gpsro
All TERRA-SAR-X setting RO bending angles Missing
Ozone
NOAA-19 SBUV layer ozone, top pressure 250 : OutOfRange
Considerably: stdev_fg_depar_du=0, expected range: 0.19 0.45
NOAA-19 SBUV layer ozone, top pressure 410 : OutOfRange
Considerably: stdev_fg_depar_du=0, expected range: 0.31 0.73
NOAA-19 SBUV layer ozone, top pressure 100 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: avg_fg_depar_du=0, expected range: 0.03 0.08
Slightly: stdev_fg_depar_du=0, expected range: 0.11 0.17
NOAA-19 SBUV layer ozone, top pressure 160 : OutOfRange
Slightly: stdev_fg_depar_du=0, expected range: 0.16 0.29
airep
BAW97A AIREP Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=5, expected range: -0.76 2.20
Severely: rms(fg_depar)=5, expected range: 0.00 2.40
AAL55 AIREP Temperature (k) 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
amdar
HHHKJFBA 146 Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.38
SL0025 146 Temperature (k) 40000 70000 : OutOfRange
Severely: avg(fg_depar)=1, expected range: -1.34 0.23
QBDVDIBA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.07 1.19
PWZUNVJA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.30
JCJIWCZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.06 1.20
3XUUOEZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=1, expected range: 0.09 1.17
Z3SUNVZA 146 Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.53
HHHKJFBA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=-4, expected range: -1.02 0.89
Severely: rms(fg_depar)=4, expected range: 0.00 1.61
Considerably: freq(qc_pge)=81, expected range: 0.00 70.00
SR1XLDZA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: avg(fg_depar)=-2, expected range: -1.02 1.42
In-Situ measurements
SYNOP Surface pressure (Pa) WMO BLOCK 98 0 0 : OutOfRange
2 times in the last 10 days for at least one item
Severely: count(*)=211, expected range: 159.00 192.00
Slightly: rms(fg_depar)=131, expected range: 26.00 125.00
All European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 11 0 400 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 61 0 40000 Missing
All American Wind Profiler Wind Vector difference (m/s) WMO BLOCK 70 0 400 Missing
All TEMP Land Report Temperature (k) WMO BLOCK 44 70000 101325 Missing
Land Automatic Report Surface pressure (Pa) WMO BLOCK 68 0 0 : OutOfRange
Slightly: avg(fg_depar)=-30, expected range: -23.00 56.00
TEMP Land Report Temperature (k) WMO BLOCK 70 0 40000 : OutOfRange
Slightly: count(*)=428, expected range: 450.00 850.00
TEMP Land Report Temperature (k) WMO BLOCK 72 0 40000 : OutOfRange
Slightly: count(*)=3917, expected range: 2800.00 3800.00
BUOYS
2301562 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 70.00
71764 Drifter Buoy Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
5401517 189 Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=91, expected range: 0.00 70.00
metar
SBBT METAR Surface pressure (Pa) : OutOfRange
14 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=84, expected range: 0.00 50.00
KI75 METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=252, expected range: 0.00 149.00
KIFA METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=304, expected range: 0.00 145.00
UHBB METAR Surface pressure (Pa) : OutOfRange
Severely: avg(fg_depar)=154, expected range: -185.00 26.00
KIIB METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=209, expected range: 0.00 130.00
KVTI METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=239, expected range: 0.00 133.00
KALO METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=265, expected range: 0.00 150.00
DAOO METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=220, expected range: 0.00 124.00
KMXO METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=181, expected range: 0.00 121.00
KCSQ METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=271, expected range: 0.00 166.00
KMIW METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=265, expected range: 0.00 142.00
KAMW METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=258, expected range: 0.00 146.00
KSPW METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=249, expected range: 0.00 159.00
KCCY METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=231, expected range: 0.00 135.00
KOLZ METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=227, expected range: 0.00 135.00
PAOO METAR Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
ship
34002 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
10 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=99, expected range: 0.00 50.00
42023 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
Severely: avg(fg_depar)=9, expected range: -1.94 5.50
Severely: rms(fg_depar)=9, expected range: 0.00 6.30
Considerably: freq(qc_pge)=83, expected range: 0.00 70.00
46083 Automatic SHIP Report Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=227, expected range: 0.00 120.00
9V2775 SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
synop
10827 170 Surface pressure (Pa) : OutOfRange
11 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=52, expected range: 0.00 50.00
98132 SYNOP Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=337, expected range: 0.00 146.00
76640 SYNOP 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
68350 Land Automatic Report Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
13601 SYNOP Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
68182 Land Automatic Report 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
71335 170 Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
Radiosondes
17240 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 2.10
30935 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00

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