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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2018-02-08 12:00

iasi
METOP-A IASI 6985 radiances : OutOfRange
Slightly: avg(biascorr)=-1, expected range: -1.02 -0.95
airep
CSN618 AIREP Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
amdar
QBHKMBBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely_persistent: freq(qc_pge)=57, expected range: 0.00 50.00
SQ2XLIBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=7, expected range: 0.59 4.50
Severely: rms(fg_depar)=8, expected range: 0.63 5.20
IWQ0FEZA 146 Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=-7, expected range: -1.04 1.15
Severely: rms(fg_depar)=9, expected range: 0.00 1.82
MTLYNMBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=87, expected range: 0.00 70.00
YHHJNAJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
X02MKNJA 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)=83, expected range: 0.00 70.00
R2YY1YRA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=80, expected range: 0.00 70.00
Atmospheric Motion Vector
METEOSAT-8 cloudy WV1 0 40000 : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=8114, expected range: 3000.00 7300.00
METEOSAT-8 cloudy WV2 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=6604, expected range: 2500.00 6100.00
METEOSAT-8 IR3 0 40000 : OutOfRange
1 times in the last 10 days for at least one item
Slightly: count(*)=4515, expected range: 1790.00 4300.00
In-Situ measurements
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 42 0 0 Missing
All European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 11 0 400 Missing
TEMP Land Report Temperature (k) WMO BLOCK 96 0 40000 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.93 2.30
Land Automatic Report Surface pressure (Pa) WMO BLOCK 62 0 0 : OutOfRange
Slightly: count(*)=3, expected range: 3.10 4.80
TEMP Land Report Temperature (k) 02 40000 70000 : OutOfRange
Slightly: rms(fg_depar)=0, expected range: 0.13 0.88
BUOYS
1300131 Moored Buoy Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=186, expected range: 0.00 121.00
4802004 189 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
metar
FTTA METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=317, expected range: 0.00 180.00
FAGG METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=308, expected range: 0.00 144.00
MHTG METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=264, expected range: 0.00 166.00
LRBO METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=277, expected range: 0.00 150.00
GQPP METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=239, expected range: 0.00 129.00
MDLR METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=226, expected range: 0.00 107.00
FBFT METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=263, expected range: 0.00 171.00
ship
D5DS3 SHIP Report Wind Vector difference (m/s) : OutOfRange
5 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=85, expected range: 0.00 50.00
WDB3161 SHIP Report Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=100, expected range: 0.00 50.00
ZDNC6 SHIP Report Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=85, expected range: 0.00 50.00
VTXF SHIP Report Surface pressure (Pa) : OutOfRange
7 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=95, expected range: 0.00 50.00
C6SE5 SHIP Report Surface pressure (Pa) : OutOfRange
Severely_persistent: freq(qc_pge)=77, expected range: 0.00 50.00
IBNY SHIP Report Wind Vector difference (m/s) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
42365 Automatic SHIP Report Wind Vector difference (m/s) : OutOfRange
5 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
synop
08271 170 Surface pressure (Pa) : OutOfRange
12 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=57, expected range: 0.00 50.00
29833 170 Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=55, expected range: 0.00 50.00
04158 170 Surface pressure (Pa) : OutOfRange
3 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=99, expected range: 0.00 50.00
37395 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
17500 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
24143 170 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
Radiosondes
96253 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=15, expected range: 1.24 7.80
Severely: rms(fg_depar)=17, expected range: 1.62 8.90
72402 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=5, expected range: 0.15 3.40
47678 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=3, expected range: -1.00 1.52
Severely: rms(fg_depar)=10, expected range: 0.00 4.30
96253 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00