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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

Early delivery 4D-VAR at 2021-12-02 12:00

amsua
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6415, expected range: 0.5582 0.5858
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6216, expected range: 0.5400 0.5844
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
35 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.5976, expected range: 0.5282 0.5526
iasi
METOP-B IASI RADIANCES CHANNEL 3168 : out of range
33 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0998, expected range: -0.0538 -0.0057
METOP-B IASI RADIANCES CHANNEL 1626 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1732, expected range: 0.1300 0.1464
METOP-B IASI RADIANCES CHANNEL 1536 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2331, expected range: 0.1942 0.2133
METOP-B IASI RADIANCES CHANNEL 292 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0307, expected range: -0.0207 -0.0183
METOP-B IASI RADIANCES CHANNEL 1521 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0480, expected range: -0.0724 -0.0617
METOP-B IASI RADIANCES CHANNEL 290 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0729, expected range: 0.0910 0.1029
METOP-C IASI RADIANCES CHANNEL 214 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3065, expected range: 0.2470 0.2806
METOP-C IASI RADIANCES CHANNEL 292 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0649, expected range: -0.0537 -0.0523
METOP-C IASI RADIANCES CHANNEL 290 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0492, expected range: 0.0681 0.0759
cris
NOAA20 CRIS RADIANCES CHANNEL 618 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0540, expected range: -0.1217 -0.0864
NOAA20 CRIS RADIANCES CHANNEL 665 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0859, expected range: 0.0048 0.0053
NOAA20 CRIS RADIANCES CHANNEL 409 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0507, expected range: -0.2194 -0.2016
airs
AQUA AIRS RADIANCES CHANNEL 1471 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-1.4167, expected range: -1.1404 -1.0758
atms
NPP ATMS RADIANCES CHANNEL 14 : out of range
69 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0094, expected range: -0.0915 -0.0619
Severely_persistent: avg_biascorr=-0.2933, expected range: -0.0884 -0.0788
Severely_persistent: stdev_fgdepar=0.5021, expected range: 0.4139 0.4509
NPP ATMS RADIANCES CHANNEL 13 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4436, expected range: -0.2918 -0.2860
NPP ATMS RADIANCES CHANNEL 15 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.8619, expected range: 0.6913 0.7345
NOAA20 ATMS RADIANCES CHANNEL 11 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3657, expected range: -0.4343 -0.4295
NOAA20 ATMS RADIANCES CHANNEL 15 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.8298, expected range: 0.6523 0.6617
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
77 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5803, expected range: -0.3951 -0.3872
Severely_persistent: avg_biascorr=-0.3865, expected range: -0.3045 -0.2737
Severely_persistent: stdev_fgdepar=0.4616, expected range: 0.3693 0.4014
gpsro
All COSMIC2-E1 GPSRO RISING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 580.40 1566.40
Atmospheric Motion Vector
METEOSAT-8 AMV CLOUDY WV1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 : out of range
Considerable: obs_number=993.0000, expected range: 1390.0237 1786.9763
Geostationary CSR
All GOES-16 ABI ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 29885.18 41322.74
All GOES-17 GEOS RADIANCES ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 10554.87 75774.34
scatt
All HY-2B SCATTEROMETER Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 140516.52
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1-2 (HPA) : out of range
51 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.0213, expected range: 0.0115 0.0115