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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-11-23 12:00

amsua
NOAA 15 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7064, expected range: 0.5290 0.5874
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7701, expected range: 0.6616 0.7152
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7186, expected range: 0.5214 0.5886
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6837, expected range: 0.5384 0.5985
NOAA 19 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=0.7280, expected range: 0.5521 0.6041
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7096, expected range: 0.5214 0.5871
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7099, expected range: 0.6128 0.6492
METOP-C 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=0.6954, expected range: 0.4981 0.5435
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7693, expected range: 0.5091 0.5504
NOAA 15 AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
3 times in the last 10 days for at least one item
Severe: stdev_norm_fgdepar=0.7815, expected range: 0.6584 0.7236
iasi
METOP-B IASI RADIANCES CHANNEL 5401 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3464, expected range: 0.2091 0.2807
METOP-C IASI RADIANCES CHANNEL 59 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3201, expected range: 0.3564 0.3600
METOP-C IASI RADIANCES CHANNEL 128 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2285, expected range: 0.2569 0.2755
METOP-C IASI RADIANCES CHANNEL 148 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2113, expected range: 0.2288 0.2492
METOP-B IASI RADIANCES (62 channels affected) : out of range
Severe: stdev_fgdepar=0.2718, expected range: 0.3123 0.3192
METOP-B IASI RADIANCES (24 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0364, expected range: -0.1941 -0.0811
METOP-C IASI RADIANCES (19 channels affected) : out of range
Severe: avg_biascorr=0.6278, expected range: 0.3199 0.3479
METOP-C IASI RADIANCES (62 channels affected) : out of range
Considerable: stdev_fgdepar=0.2536, expected range: 0.2721 0.3036
METOP-C IASI RADIANCES CHANNEL 3049 : out of range
4 times in the last 10 days for at least one item
Considerable: obs_number=2362.0000, expected range: 2533.4018 3030.2718
cris
NOAA20 CRIS RADIANCES CHANNEL 963 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0222, expected range: -0.0244 -0.0215
NOAA20 CRIS RADIANCES CHANNEL 965 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1795, expected range: -0.2379 -0.2076
NOAA20 CRIS RADIANCES (15 channels affected) : out of range
Severe: avg_biascorr=0.1584, expected range: 0.0544 0.1075
airs
AQUA AIRS RADIANCES CHANNEL 151 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6035, expected range: 0.5194 0.5525
AQUA AIRS RADIANCES CHANNEL 98 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3535, expected range: 0.0981 0.1112
AQUA AIRS RADIANCES CHANNEL 117 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1913, expected range: -0.0898 -0.0882
AQUA AIRS RADIANCES (11 channels affected) : out of range
Severe: stdev_fgdepar=0.5867, expected range: 0.6332 0.6808
gmi
GPM GMI ALSKY RADIANCES (9 channels affected) : out of range
Considerable: obs_number=8083.0000, expected range: 11016.7983 13014.3782
atms
NPP ATMS RADIANCES CHANNEL 14 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.5883, expected range: 0.4033 0.4915
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3172, expected range: 0.2542 0.2813
NPP ATMS RADIANCES CHANNEL 13 : out of range
3 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.3445, expected range: 0.3001 0.3239
ssmis
DMSP-18 SSMIS RADIANCES CHANNEL 10 : out of range
Considerable: obs_number=8693.0000, expected range: 9153.2680 10307.6732
DMSP-18 SSMIS RADIANCES CHANNEL 11 : out of range
Considerable: obs_number=8678.0000, expected range: 9176.1025 10268.3681