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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2019-08-18 00:00

amsua
NOAA-15/AMSUA RADIANCES CHANNEL 9 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0654, expected range: 0.0758 0.0865
NOAA-15/AMSUA RADIANCES CHANNEL 10 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1476, expected range: 0.1685 0.1911
NOAA-15/AMSUA RADIANCES CHANNEL 8 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0035, expected range: 0.0167 0.0371
NOAA-19/AMSUA RADIANCES CHANNEL 9 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0669, expected range: 0.1061 0.1539
NOAA-19/AMSUA RADIANCES CHANNEL 8 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=1.7576, expected range: 2.4518 3.2557
Severely_persistent: avg_biascorr=1.0617, expected range: 0.6491 0.8381
iasi
METOP-B/IASI RADIANCES CHANNEL 2343 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2338, expected range: 0.1913 0.2152
METOP-B/IASI RADIANCES CHANNEL 2354 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2405, expected range: 0.2039 0.2266
METOP-B/IASI RADIANCES CHANNEL 2355 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2356, expected range: 0.1995 0.2229
METOP-B/IASI RADIANCES CHANNEL 178 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1695, expected range: 0.0587 0.0963
METOP-C/IASI RADIANCES CHANNEL 178 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1288, expected range: 0.0045 0.0668
METOP-C/IASI RADIANCES CHANNEL 179 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1674, expected range: 0.0624 0.1292
METOP-C/IASI RADIANCES (28 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.1688, expected range: 0.1453 0.1579
METOP-A/IASI RADIANCES CHANNEL 566 : out of range
Considerable: stdev_fgdepar=0.3707, expected range: 0.2631 0.3440
METOP-A/IASI RADIANCES CHANNEL 571 : out of range
Considerable: stdev_fgdepar=0.3833, expected range: 0.2530 0.3490
METOP-A/IASI RADIANCES CHANNEL 573 : out of range
Considerable: stdev_fgdepar=0.3857, expected range: 0.2462 0.3552
cris
NPP/CRIS RADIANCES CHANNEL 622 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.2224, expected range: 0.0689 0.1272
NPP/CRIS RADIANCES CHANNEL 1189 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-0.4910, expected range: -0.1422 0.1834
NPP/CRIS RADIANCES CHANNEL 1149 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=3.2831, expected range: 0.1480 0.3528
NOAA20/CRIS RADIANCES CHANNEL 63 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3848, expected range: 0.3271 0.3602
NOAA20/CRIS RADIANCES CHANNEL 33 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2149, expected range: 0.1162 0.1623
NOAA20/CRIS RADIANCES CHANNEL 34 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3515, expected range: 0.2610 0.2922
NOAA20/CRIS RADIANCES CHANNEL 35 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3739, expected range: 0.3121 0.3449
NPP/CRIS RADIANCES (78 channels affected) : out of range
Severe: avg_biascorr=0.1961, expected range: 0.2203 0.2257
NPP/CRIS RADIANCES (91 channels affected) : out of range
Severe: obs_number=9691.0000, expected range: 4442.7558 5467.5910
NOAA20/CRIS RADIANCES (54 channels affected) : out of range
1 times in the last 10 days for at least one item
Slight: obs_number=22777.0000, expected range: 22918.3788 23367.3435
atms
NPP/ATMS RADIANCES (7 channels affected) : out of range
Considerable: obs_number=3600.0000, expected range: 2966.8739 3437.1261
ssmis
DMSP-17/SSMIS RADIANCES (17 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=10177.0000, expected range: 12147.3911 14367.5563
DMSP-18/SSMIS RADIANCES (13 channels affected) : out of range
Considerable: obs_number=11142.0000, expected range: 12023.7239 13962.4526
gpsro
GNOS RISING HEIGHT 4 : out of range
Slight: avg_norm_fgdepar=0.2386, expected range: -0.2197 0.1801
Geostationary CSR
GOES-15/IMAGER RADIANCES CHANNEL 2 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: obs_number=121121.0000, expected range: 16937.0526 34387.0031
GOES-15/IMAGER RADIANCES CHANNEL 3 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: obs_number=38990.0000, expected range: 3253.8024 15455.0865
GOES-16/ABI RADIANCES CHANNEL 2 : out of range
2 times in the last 10 days for at least one item
Severe: obs_number=37555.0000, expected range: 77008.7510 104939.4595
GOES-16/ABI RADIANCES CHANNEL 3 : out of range
2 times in the last 10 days for at least one item
Severe: obs_number=37576.0000, expected range: 77103.8646 104918.3986
GOES-16/ABI RADIANCES CHANNEL 4 : out of range
2 times in the last 10 days for at least one item
Severe: obs_number=37710.0000, expected range: 77261.3834 105119.9850
Radiosondes
HIGH RESO LAND TEMP TEMPERATURE (K) PRESSURE LAYER 900-1200 (HPA) : out of range
Severe: avg_biascorr=-0.0005, expected range: 0.0000 0.0000
amdar
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 242.6484
WIGOS AMDAR WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range
Severe: avg_fgdepar=6.3134, expected range: 2.2364 4.3357
synop
MANUAL LAND SYNOP SURFACE PRESSURE (PA) : out of range
8 times in the last 10 days for at least one item
Severely_persistent: obs_number=209.0000, expected range: 228.1312 252.2022
BUFR LAND SYNOP SURFACE PRESSURE (PA) : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-7.3333, expected range: 0.0000 0.0000
Severely_persistent: avg_biascorr=8.3077, expected range: 0.0000 0.0000
AUTOMATIC LAND SYNOP RH2M (%) : out of range
Severe: obs_number=385.0000, expected range: 550.8949 672.8828
AUTOMATIC LAND SYNOP SURFACE PRESSURE (PA) : out of range
3 times in the last 10 days for at least one item
Severe: obs_number=1314.0000, expected range: 2593.7041 3057.1848
Severe: avg_biascorr=-4.9254, expected range: 0.0000 0.0000
MANUAL LAND SYNOP RH2M (%) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=104.0000, expected range: 119.5724 163.6498
buoy
DRIFTING BUOYS SURFACE PRESSURE (PA) : out of range
Slight: obs_number=8468.0000, expected range: 8773.4275 10593.7076