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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

Ensemble Data Assimilation at 2020-06-01 00:00

iasi
METOP-B IASI RADIANCES CHANNEL 217 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1075, expected range: -0.0991 -0.0899
METOP-A IASI RADIANCES CHANNEL 3448 : out of range
Considerable: stdev_fgdepar=0.8317, expected range: 0.5378 0.7101
METOP-B IASI RADIANCES CHANNEL 189 : out of range
Considerable: stdev_fgdepar=0.3638, expected range: 0.3069 0.3436
cris
NPP CRIS RADIANCES CHANNEL 39 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2604, expected range: 0.2989 0.3238
NPP CRIS RADIANCES CHANNEL 54 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2263, expected range: 0.2742 0.2942
NPP CRIS RADIANCES CHANNEL 60 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1897, expected range: 0.2239 0.2463
NOAA20 CRIS RADIANCES CHANNEL 45 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1406, expected range: 0.1978 0.2061
NOAA20 CRIS RADIANCES CHANNEL 48 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1490, expected range: 0.2203 0.2209
NOAA20 CRIS RADIANCES (31 channels affected) : out of range
Considerable: obs_number=2470.0000, expected range: 2145.1420 2304.4830
saphir
All MEGHA-TROPIQUES SAPHIR ALLSKY ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 768.64 18552.36
mwhs
FY-3B MWHS RADIANCES CHANNEL 3 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=5204.0000, expected range: 13793.7639 21080.3611
FY-3B MWHS RADIANCES CHANNEL 4 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=5207.0000, expected range: 13812.7160 21108.6590
FY-3B MWHS RADIANCES CHANNEL 5 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=3375.0000, expected range: 8834.4273 13764.8227
atms
NPP ATMS RADIANCES (10 channels affected) : out of range
Considerable: obs_number=5200.0000, expected range: 6489.8595 8656.1405
NOAA20 ATMS RADIANCES (7 channels affected) : out of range
Considerable: obs_number=3732.0000, expected range: 3265.4587 3453.9163
gpsro
All FY-3C GNOS RISING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 467.59 2312.99
All COSMIC2-E3 GPSRO RISING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 892.68 3140.25
COSMIC2-E5 GPSRO SETTING (8 impact heights affected) : out of range
Considerable: obs_number=586.0000, expected range: 864.5849 1925.7008
COSMIC2-E6 GPSRO SETTING (24 impact heights affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=500.0000, expected range: 1092.8015 2611.5062
Atmospheric Motion Vector
METEOSAT-11 AMV IR3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HP : out of range
Slight: avg_fgdepar=1.8593, expected range: 1.2859 1.6860
Geostationary CSR
METEOSAT-8 SEVIRI RADIANCES CHANNEL 8 : out of range
Severe: avg_biascorr=-0.3516, expected range: -0.3002 -0.2453
Radiosondes
HIGH RESO LAND TEMP Q (G/KG) (2 pressure layers affected) : out of range
Severe: obs_number=196.0000, expected range: 128.3572 131.8928
HIGH RESO LAND TEMP TEMPERATURE (K) PRESSURE LAYER 0-300 (HPA) : out of range
Severe: rms_fgdepar=5.7192, expected range: 1.2919 1.8826
HIGH RESO LAND TEMP TEMPERATURE (K) (4 pressure layers affected) : out of range
Severe: obs_number=61.0000, expected range: 294.4643 326.5357
LAND TEMP Q (G/KG) PRESSURE LAYER 900-1200 (HPA) : out of range
Considerable: obs_number=94.0000, expected range: 14.3585 67.3915
HIGH RESO LAND TEMP TEMPERATURE (K) (2 pressure layers affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=668.0000, expected range: 747.0120 766.2380
synop
AUTOMATIC LAND SYNOP SURFACE PRESSURE (PA) : out of range
Considerable: rms_fgdepar=165.9884, expected range: 26.7273 117.3753
Considerable: rms_fgdepar=247.3406, expected range: 41.2887 169.2192
Considerable: rms_fgdepar=224.2249, expected range: 53.5484 154.6068