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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-12-05 00:00

amsua
NOAA 15 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6725, expected range: 0.5694 0.5874
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6629, expected range: 0.5679 0.5914
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6651, expected range: 0.5797 0.5985
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6538, expected range: 0.5692 0.5903
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6673, expected range: 0.4342 0.5580
Severely_persistent: stdev_norm_fgdepar=0.6283, expected range: 0.5126 0.5504
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7009, expected range: 0.6151 0.6492
NOAA 18 AMSUA ALL SKY RADIANCES (6 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: stdev_norm_fgdepar=0.7960, expected range: 0.6890 0.7142
cris
NOAA20 CRIS RADIANCES CHANNEL 71 : out of range
Considerable: obs_number=2553.0000, expected range: 2069.3033 2413.8217
NOAA20 CRIS RADIANCES CHANNEL 70 : out of range
Considerable: obs_number=2552.0000, expected range: 2003.7602 2413.4898
NOAA20 CRIS RADIANCES CHANNEL 69 : out of range
Considerable: obs_number=2553.0000, expected range: 2062.3768 2407.2482
NOAA20 CRIS RADIANCES CHANNEL 68 : out of range
Considerable: obs_number=2553.0000, expected range: 2199.4233 2328.7017
NOAA20 CRIS RADIANCES CHANNEL 66 : out of range
Considerable: obs_number=2553.0000, expected range: 2141.1121 2408.2629
NOAA20 CRIS RADIANCES CHANNEL 67 : out of range
Considerable: obs_number=2547.0000, expected range: 2026.3043 2389.6957
NOAA20 CRIS RADIANCES CHANNEL 62 : out of range
Considerable: obs_number=2553.0000, expected range: 2166.5816 2346.5434
atms
NPP ATMS RADIANCES (7 channels affected) : out of range
Considerable: obs_number=3505.0000, expected range: 2992.1619 3371.0881
ssmis
DMSP-17 SSMIS RADIANCES CHANNEL 5 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0046, expected range: 0.0036 0.0037
gpsro
All COSMIC2-E1 GPSRO RISING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 1498.65 2793.66
Atmospheric Motion Vector
HIMAWARI-8 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: obs_number=744.0000, expected range: 1634.8496 3159.3432
Geostationary CSR
All GOES-16 ABI ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 61808.59 80807.13
All GOES-17 GEOS RADIANCES ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 18492.01 145688.57
amdar
AMDAR WIND VECTOR DIFF (M/S) (2 pressure layers affected) : out of range
Severe: rms_fgdepar=9.9438, expected range: 1.6076 4.2104
AMDAR WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range
Severe: rms_fgdepar=10.2544, expected range: 2.4838 4.0105
Severe: rms_fgdepar=10.0457, expected range: 2.2429 3.7505
All TAMDAR TEMPERATURE (K) ALL LAYERS Alantic Tropical are : all data missing
Severe: obs_number=0, expected range: 0.00 286.28
TAMDAR WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : missing
Severe: obs_number=0.0000, expected range: 0.0000 256.4050