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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2020-05-31 12:00

iasi
METOP-B IASI RADIANCES CHANNEL 217 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1115, expected range: -0.0991 -0.0920
cris
NPP CRIS RADIANCES (17 channels affected) : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1902, expected range: 0.2092 0.2141
NPP CRIS RADIANCES CHANNEL 39 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2680, expected range: 0.2989 0.3284
NPP CRIS RADIANCES CHANNEL 54 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2318, expected range: 0.2742 0.3002
NPP CRIS RADIANCES CHANNEL 60 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1884, expected range: 0.2239 0.2521
NOAA20 CRIS RADIANCES CHANNEL 45 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1257, expected range: 0.1978 0.2225
NOAA20 CRIS RADIANCES CHANNEL 48 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1294, expected range: 0.2203 0.2339
NOAA20 CRIS RADIANCES CHANNEL 60 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1138, expected range: 0.1811 0.2652
mwhs2
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 2 : out of range
Severe: avg_norm_fgdepar=0.2597, expected range: -0.0095 0.1218
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 6 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_norm_fgdepar=0.8156, expected range: 0.7025 0.7681
mwhs
All FY-3B MWHS ALL CHANNELS Global : all data missing
Severe: obs_number=0, expected range: 16108.29 19064.65
atms
NPP ATMS RADIANCES (10 channels affected) : out of range
Considerable: obs_number=15376.0000, expected range: 20187.7704 24817.4060
NOAA20 ATMS RADIANCES (11 channels affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=14465.0000, expected range: 20072.6718 25340.5047
NOAA20 ATMS RADIANCES CHANNEL 11 : out of range
Considerable: avg_biascorr=-0.0982, expected range: -0.0826 -0.0618
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 3101.30
All COSMIC2-E5 GPSRO RISING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 648.69 2308.54
All COSMIC2-E6 GPSRO RISING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 712.14 3257.53
Atmospheric Motion Vector
GOES-16 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=1.3185, expected range: 0.7695 1.0848
NOAA20 VIIRS-AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: obs_number=503.0000, expected range: 0.0000 331.9774
GOES-17 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range
Considerable: obs_number=266.0000, expected range: 92.2314 213.2686
Radiosondes
HIGH RESO LAND TEMP TEMPERATURE (K) PRESSURE LAYER 0-300 (HPA) : out of range
1 times in the last 10 days for at least one item
Severe: rms_fgdepar=3.5353, expected range: 0.7817 1.3022
Severe: rms_fgdepar=4.2688, expected range: 0.6665 1.3798
HIGH RESO LAND TEMP Q (G/KG) (2 pressure layers affected) : out of range
Severe: obs_number=198.0000, expected range: 257.3709 266.6291
All HIGH RESO LAND TEMP ALL LAYERS WMO BLOCK 26 : all data missing
Severe: obs_number=0, expected range: 80.72 140.88
LAND TEMP TEMPERATURE (K) PRESSURE LAYER 600-900 (HPA) : out of range
Considerable: rms_fgdepar=3.9922, expected range: 0.2217 2.5581
HIGH RESO LAND TEMP Q (G/KG) (4 pressure layers affected) : out of range
Considerable: obs_number=231.0000, expected range: 292.5593 408.3296
HIGH RESO LAND TEMP Q (G/KG) PRESSURE LAYER 600-900 (HPA) : out of range
Considerable: obs_number=78.0000, expected range: 89.8843 95.8935
amdar
WIGOS AMDAR WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : missing
1 times in the last 10 days for at least one item
Severe: obs_number=0.0000, expected range: 0.0000 312.5275
synop
MANUAL LAND SYNOP RH2M (%) : out of range
Considerable: obs_number=189.0000, expected range: 217.8869 252.1131
Considerable: obs_number=70.0000, expected range: 87.7422 120.0078
buoy
DRIBU SURFACE PRESSURE (PA) : out of range
Slight: rms_fgdepar=150.4900, expected range: 16.0042 113.1889