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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

airs
AQUA AIRS 248 radiances : OutOfRange
3 times in the last 10 days for at least one item
Slightly: avg(biascorr)=0, expected range: -0.26 -0.04
iasi
METOP-A IASI 101 radiances : OutOfRange
Slightly: avg(biascorr)=0, expected range: -0.18 0.05
amdar
GS3XVAJA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=19, expected range: -3.10 9.80
Severely: rms(fg_depar)=20, expected range: 0.00 13.50
Considerably: freq(qc_pge)=90, expected range: 0.00 70.00
NSQFGARA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: avg(fg_depar)=10, expected range: -0.05 6.60
Severely: rms(fg_depar)=11, expected range: 0.00 7.70
SL0095 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.10 2.20
SQ3UIJZA 146 Temperature (k) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=3, expected range: 0.00 1.97
3VVJM4BA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=87, expected range: 0.00 70.00
I0X2MLBA 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)=71, expected range: 0.00 70.00
LLIK4QBA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
XYJYJ5JA 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)=85, expected range: 0.00 70.00
YHHJNAJA 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)=88, expected range: 0.00 70.00
1UO13QZA 146 Wind Vector difference (m/s) 0 40000 : OutOfRange
Considerably: freq(qc_pge)=81, expected range: 0.00 70.00
In-Situ measurements
All European Wind Profiler Wind Vector difference (m/s) WMO BLOCK 11 0 400 Missing
All Drifter Buoy Surface pressure (Pa) WMO BLOCK 42 0 0 Missing
All PILOT Wind Vector difference (m/s) WMO BLOCK 93 0 40000 Missing
TEMP Land Report Temperature (k) WMO BLOCK 12 40000 70000 : OutOfRange
2 times in the last 10 days for at least one item
Slightly: count(*)=288, expected range: 290.00 450.00
TEMP Land Report Temperature (k) WMO BLOCK 36 0 40000 : OutOfRange
Slightly: rms(fg_depar)=3, expected range: 0.00 3.10
TEMP Land Report Temperature (k) WMO BLOCK 41 0 40000 : OutOfRange
Slightly: avg(fg_depar)=0, expected range: -0.19 0.69
Slightly: rms(fg_depar)=2, expected range: 0.65 2.30
TEMP Land Report Temperature (k) WMO BLOCK 80 0 40000 : OutOfRange
Slightly: count(*)=35, expected range: 37.00 300.00
TEMP Land Report Temperature (k) WMO BLOCK 80 40000 70000 : OutOfRange
Slightly: count(*)=12, expected range: 13.50 108.00
TEMP Land Report Temperature (k) WMO BLOCK 97 40000 70000 : OutOfRange
Slightly: rms(fg_depar)=1, expected range: 0.26 1.40
BUOYS
5400955 189 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=201, expected range: 0.00 108.00
3301530 189 Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=90, expected range: 0.00 70.00
1501512 189 Surface pressure (Pa) : OutOfRange
5 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
1501607 189 Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=87, expected range: 0.00 70.00
metar
SCJO METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=227, expected range: 0.00 133.00
LERS METAR Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=192, expected range: 0.00 128.00
MDST METAR Surface pressure (Pa) : OutOfRange
1 times in the last 10 days for at least one item
Severely: rms(fg_depar)=308, expected range: 0.00 180.00
VLSK METAR Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=100, expected range: 0.00 70.00
pilot
42182 PILOT Wind Vector difference (m/s) 0 40000 : OutOfRange
8 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
ship
D5DS3 SHIP Report Wind Vector difference (m/s) : OutOfRange
12 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=91, expected range: 0.00 50.00
C6SE5 SHIP Report Surface pressure (Pa) : OutOfRange
2 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=80, expected range: 0.00 50.00
VRPY7 SHIP Report Surface pressure (Pa) : OutOfRange
16 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=81, expected range: 0.00 50.00
synop
08271 170 Surface pressure (Pa) : OutOfRange
17 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=84, expected range: 0.00 50.00
04158 170 Surface pressure (Pa) : OutOfRange
9 times in the last 10 days for at least one item
Severely_persistent: freq(qc_pge)=94, expected range: 0.00 50.00
89011 Land Automatic Report Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=428, expected range: 0.00 210.00
08175 170 Surface pressure (Pa) : OutOfRange
Severely: rms(fg_depar)=157, expected range: 0.00 104.00
41600 SYNOP Surface pressure (Pa) : OutOfRange
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
04183 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
41785 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 70.00
71179 170 Surface pressure (Pa) : OutOfRange
4 times in the last 10 days for at least one item
Considerably: freq(qc_pge)=75, expected range: 0.00 70.00
Radiosondes
54662 TEMP Land Report Wind Vector difference (m/s) 0 40000 : OutOfRange
Severely: rms(fg_depar)=13, expected range: 0.00 8.60
63450 TEMP Land Report Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
36003 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=5, expected range: 0.00 3.00
71603 109 Q (g/kg) 0 40000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
41024 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: avg(fg_depar)=2, expected range: -0.64 1.23
Severely: rms(fg_depar)=4, expected range: 0.44 2.70
47646 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=8, expected range: 0.00 4.60
71907 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=4, expected range: 0.00 2.30
37259 TEMP Land Report Temperature (k) 0 40000 : OutOfRange
Severely: rms(fg_depar)=7, expected range: 0.00 4.20
97372 TEMP Land Report Temperature (k) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=2, expected range: 0.00 1.84
71043 TEMP Land Report Q (g/kg) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
71945 109 Q (g/kg) 40000 70000 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00
74004 TEMP Land Report Q (g/kg) 70000 101325 : OutOfRange
Severely: rms(fg_depar)=0, expected range: 0.00 0.00