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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2019-08-16 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=0.0667, expected range: 0.0758 0.0880
NOAA-19/AMSUA RADIANCES CHANNEL 8 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=1.0806, expected range: 0.6670 0.8381
Severely_persistent: avg_biascorr=1.7836, expected range: 2.4518 3.0314
iasi
METOP-B/IASI RADIANCES CHANNEL 178 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1742, expected range: 0.0801 0.0963
METOP-B/IASI RADIANCES CHANNEL 179 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2125, expected range: 0.1126 0.1767
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=0.1426, expected range: 0.0301 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=0.1785, expected range: 0.0774 0.1292
METOP-A/IASI RADIANCES (138 channels affected) : out of range
Severe: avg_biascorr=0.0727, expected range: 0.0408 0.0615
METOP-A/IASI RADIANCES CHANNEL 373 : out of range
2 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.2161, expected range: 0.2322 0.2509
METOP-C/IASI RADIANCES (26 channels affected) : out of range
Severe: avg_biascorr=0.1704, expected range: 0.1469 0.1579
METOP-A/IASI RADIANCES CHANNEL 284 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.2142, expected range: 0.2286 0.2576
METOP-A/IASI RADIANCES CHANNEL 377 : out of range
Considerable: stdev_fgdepar=0.2141, expected range: 0.2255 0.2555
cris
NPP/CRIS RADIANCES CHANNEL 622 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.2078, expected range: 0.0632 0.1272
NPP/CRIS RADIANCES CHANNEL 1157 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-1.0630, expected range: -0.2238 0.2275
NPP/CRIS RADIANCES CHANNEL 1181 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-0.7335, expected range: -0.1095 0.1408
NPP/CRIS RADIANCES CHANNEL 1189 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-0.4701, expected range: -0.1422 0.1834
NPP/CRIS RADIANCES CHANNEL 1149 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=4.0152, expected range: 0.0843 0.3528
NPP/CRIS RADIANCES (113 channels affected) : out of range
Severe: obs_number=8981.0000, expected range: 4221.0175 5467.5910
airs
AQUA/AIRS RADIANCES CHANNEL 10 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.5764, expected range: 0.3769 0.4722
AQUA/AIRS RADIANCES CHANNEL 138 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1340, expected range: 0.0045 0.0709
AQUA/AIRS RADIANCES CHANNEL 86 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0936, expected range: -0.0244 0.0461
ssmis
DMSP-18/SSMIS RADIANCES CHANNEL 6 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: obs_number=1852.0000, expected range: 287.6145 1090.6361
DMSP-18/SSMIS RADIANCES CHANNEL 7 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: obs_number=1855.0000, expected range: 287.1221 1101.9719
DMSP-18/SSMIS RADIANCES CHANNEL 10 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: obs_number=1832.0000, expected range: 269.1615 1079.4379
DMSP-18/SSMIS RADIANCES CHANNEL 11 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: obs_number=1832.0000, expected range: 271.2150 1080.6563
Geostationary CSR
GOES-15/IMAGER RADIANCES CHANNEL 2 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: obs_number=126281.0000, expected range: 19811.6459 33885.2430
GOES-15/IMAGER RADIANCES CHANNEL 3 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: obs_number=42122.0000, expected range: 3671.0077 15442.7292
Radiosondes
All HIGH RESO LAND TEMP WIND VECTOR DIFF (M/S) ALL LAYERS WMO BLOCK 78 : all data missing
Severe: obs_number=0, expected range: 0.00 521.60
amdar
AMDAR WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
Slight: rms_fgdepar=4.3292, expected range: 2.5346 4.1277
pilot
BUFR LAND PILOT WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : out of range
Slight: rms_fgdepar=6.2790, expected range: 0.0975 5.5044
synop
AUTOMATIC LAND SYNOP SURFACE PRESSURE (PA) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: obs_number=30.0000, expected range: 65.2900 111.4600
BUFR LAND SYNOP SURFACE PRESSURE (PA) : out of range
6 times in the last 10 days for at least one item
Severely_persistent: obs_number=202.0000, expected range: 114.4356 161.6894
MANUAL LAND SYNOP RH2M (%) : out of range
Severe: obs_number=55.0000, expected range: 56.0000 56.0000
ship
AUTOMATIC SHIP SURFACE PRESSURE (PA) : out of range
7 times in the last 10 days for at least one item
Slight: obs_number=4483.0000, expected range: 3871.3908 4280.6698
buoy
MOORED BUOYS SURFACE PRESSURE (PA) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: obs_number=72.0000, expected range: 111.7506 130.7065
metar
AUTOMATIC METAR SURFACE PRESSURE (PA) : out of range
1 times in the last 10 days for at least one item
Considerable: avg_biascorr=0.0000, expected range: 331.9154 975.2274