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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2019-08-18 06:00

amsua
NOAA-19/AMSUA RADIANCES CHANNEL 8 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=1.7160, expected range: 2.4475 3.4700
AQUA/AMSUA RADIANCES CHANNEL 11 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1953, expected range: 0.2095 0.2253
METOP-A/AMSUA RADIANCES (7 channels affected) : out of range
Severe: avg_biascorr=0.0932, expected range: 0.1372 0.2226
iasi
METOP-A/IASI RADIANCES CHANNEL 5399 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4116, expected range: 0.2426 0.3319
METOP-B/IASI RADIANCES CHANNEL 97 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1853, expected range: 0.0464 0.1376
METOP-A/IASI RADIANCES CHANNEL 356 : out of range
Considerable: stdev_fgdepar=0.2071, expected range: 0.2155 0.2470
METOP-A/IASI RADIANCES CHANNEL 389 : out of range
Considerable: stdev_fgdepar=0.2195, expected range: 0.2297 0.2587
cris
NPP/CRIS RADIANCES CHANNEL 622 : out of range
29 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.3170, expected range: 0.0424 0.1599
NPP/CRIS RADIANCES CHANNEL 1149 : out of range
57 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=4.8740, expected range: -0.3076 0.3155
Severely_persistent: stdev_fgdepar=1.7841, expected range: 0.0709 0.3529
NPP/CRIS RADIANCES CHANNEL 1189 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.2867, expected range: -0.1186 0.1254
Severely_persistent: obs_number=9818.0000, expected range: 3562.6823 4626.4825
NPP/CRIS RADIANCES CHANNEL 1165 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: obs_number=4656.0000, expected range: 0.0000 2158.9403
NPP/CRIS RADIANCES CHANNEL 1181 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: obs_number=5331.0000, expected range: 0.0000 2414.6245
NOAA20/CRIS RADIANCES CHANNEL 33 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2642, expected range: 0.1465 0.2242
NPP/CRIS RADIANCES CHANNEL 1109 : out of range
Slight: obs_number=17257.0000, expected range: 19547.3643 41964.5785
NPP/CRIS RADIANCES CHANNEL 1133 : out of range
Slight: obs_number=15528.0000, expected range: 18583.6600 37067.3130
NPP/CRIS RADIANCES CHANNEL 1213 : out of range
7 times in the last 10 days for at least one item
Slight: obs_number=8475.0000, expected range: 1488.9778 7438.8032
mhs
ALLSKY METOP-A/MHS RADIANCES CHANNEL 3 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7955, expected range: 0.2371 0.5273
ALLSKY METOP-A/MHS RADIANCES CHANNEL 4 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7415, expected range: 0.1773 0.5209
ssmis
DMSP-17/SSMIS RADIANCES (17 channels affected) : out of range
Considerable: obs_number=2203.0000, expected range: 3453.1768 5334.1219
Geostationary CSR
GOES-15/IMAGER RADIANCES CHANNEL 2 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: obs_number=63389.0000, expected range: 7085.4568 17964.0568
GOES-15/IMAGER RADIANCES CHANNEL 3 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: obs_number=19814.0000, expected range: 1368.1590 7913.6680
GOES-16/ABI RADIANCES CHANNEL 2 : out of range
3 times in the last 10 days for at least one item
Slight: obs_number=34226.0000, expected range: 38012.1382 53249.1151
GOES-16/ABI RADIANCES CHANNEL 3 : out of range
4 times in the last 10 days for at least one item
Slight: obs_number=34232.0000, expected range: 38017.5528 53248.3672
GOES-16/ABI RADIANCES CHANNEL 4 : out of range
3 times in the last 10 days for at least one item
Slight: obs_number=34250.0000, expected range: 38030.3749 53246.6384
Radiosondes
HIGH RESO LAND TEMP Q (G/KG) (3 pressure layers affected) : out of range
Severe: obs_number=196.0000, expected range: 63.8753 68.9483
HIGH RESO LAND TEMP TEMPERATURE (K) (3 pressure layers affected) : out of range
Severe: obs_number=267.0000, expected range: 86.6049 159.0618
amdar
WIGOS AMDAR WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range
Slight: rms_fgdepar=3.2875, expected range: 1.6505 2.8551
synop
AUTOMATIC LAND SYNOP RH2M (%) : out of range
6 times in the last 10 days for at least one item
Severely_persistent: obs_number=269.0000, expected range: 459.6760 593.3240
AUTOMATIC LAND SYNOP SURFACE PRESSURE (PA) : out of range
7 times in the last 10 days for at least one item
Severely_persistent: obs_number=501.0000, expected range: 1074.4853 1309.0702
Severely_persistent: avg_biascorr=33.7500, expected range: -10.6852 14.2483
MANUAL LAND SYNOP SURFACE PRESSURE (PA) : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=5.2174, expected range: 0.0000 0.0000
Severely_persistent: obs_number=70.0000, expected range: 81.5459 90.1208
buoy
DRIFTING BUOYS SURFACE PRESSURE (PA) : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-100.0000, expected range: 0.0000 0.0000
Severely_persistent: avg_biascorr=3.2353, expected range: 0.0000 0.0000
Severely_persistent: obs_number=59.0000, expected range: 180.9717 286.1711