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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-12-03 00:00

amsua
NOAA 15 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7339, expected range: 0.4910 0.5898
Severely_persistent: stdev_norm_fgdepar=0.6822, expected range: 0.5462 0.5874
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
1 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6961, expected range: 0.5849 0.5886
Severe: stdev_norm_fgdepar=0.7372, expected range: 0.4679 0.5998
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7631, expected range: 0.6514 0.7152
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 11 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7498, expected range: 0.6556 0.6914
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6940, expected range: 0.5800 0.5985
Considerable: stdev_norm_fgdepar=0.7274, expected range: 0.4908 0.6347
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7950, expected range: 0.4538 0.6199
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
4 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6760, expected range: 0.5752 0.5871
Severe: stdev_norm_fgdepar=0.7005, expected range: 0.4845 0.5929
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7821, expected range: 0.4502 0.6113
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7055, expected range: 0.6025 0.6492
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.8106, expected range: 0.4342 0.5580
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7173, expected range: 0.4349 0.5472
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
3 times in the last 10 days for at least one item
Severe: stdev_norm_fgdepar=0.7914, expected range: 0.4505 0.6098
iasi
METOP-B IASI RADIANCES (210 channels affected) : out of range
Severe: obs_number=15737.0000, expected range: 22714.4305 23248.8195
METOP-B IASI RADIANCES CHANNEL 386 : out of range
Considerable: avg_fgdepar=-0.1836, expected range: -0.1501 -0.0993
cris
NOAA20 CRIS RADIANCES CHANNEL 76 : out of range
Considerable: obs_number=1929.0000, expected range: 2025.4452 2340.8048
NOAA20 CRIS RADIANCES CHANNEL 75 : out of range
Considerable: obs_number=1915.0000, expected range: 2003.1748 2338.0752
mhs
METOP-C MHS ALLSKY RADIANCES CHANNEL 4 : out of range
Severe: stdev_norm_fgdepar=1.0250, expected range: 0.8489 0.9122
Considerable: avg_norm_fgdepar=0.0605, expected range: -0.1245 -0.0012
METOP-C MHS ALLSKY RADIANCES CHANNEL 3 : out of range
Severe: stdev_norm_fgdepar=1.0333, expected range: 0.8653 0.9312
NOAA-19 MHS ALLSKY RADIANCES CHANNEL 5 : out of range
4 times in the last 10 days for at least one item
Considerable: obs_number=5926.0000, expected range: 6597.5476 8004.1813
atms
NPP ATMS RADIANCES CHANNEL 7 : out of range
Slight: stdev_fgdepar=0.1300, expected range: 0.1181 0.1268
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=0.0049, expected range: 0.0035 0.0037
gpsro
All COSMIC2-E1 GPSRO RISING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 902.24 4196.21
COSMIC2-E3 GPSRO SETTING (24 impact heights affected) : out of range
Considerable: obs_number=1072.0000, expected range: 1599.7482 3372.1268
Atmospheric Motion Vector
METEOSAT-8 AMV CLOUDY WV1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-60 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=719.0000, expected range: 167.0792 502.1788
Geostationary CSR
All GOES-16 ABI ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 61762.78 80308.13
All GOES-17 GEOS RADIANCES ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 18492.01 145955.60
scatt
HY-2B SCATTEROMETER WIND VECTOR DIFF (M/S) : out of range
Considerable: obs_number=95118.0000, expected range: 114065.7274 137425.3495