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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

amsua
NOAA-19/AMSUA RADIANCES CHANNEL 8 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=1.8991, expected range: 2.4475 3.4490
AQUA/AMSUA RADIANCES CHANNEL 11 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1948, expected range: 0.2095 0.2253
METOP-A/AMSUA RADIANCES (5 channels affected) : out of range
Considerable: avg_biascorr=0.4748, expected range: 0.4958 0.5705
iasi
METOP-A/IASI RADIANCES CHANNEL 5399 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3824, expected range: 0.2426 0.3319
METOP-C/IASI RADIANCES CHANNEL 249 : out of range
33 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0740, expected range: -0.0246 0.0393
METOP-A/IASI RADIANCES CHANNEL 106 : out of range
Considerable: stdev_fgdepar=0.3231, expected range: 0.3371 0.3833
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=0.2673, expected range: 0.0409 0.1599
NPP/CRIS RADIANCES CHANNEL 1149 : out of range
56 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=4.1053, expected range: -0.3076 0.3155
Severely_persistent: stdev_fgdepar=2.9813, expected range: 0.0709 0.3529
NPP/CRIS RADIANCES CHANNEL 1157 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-0.6445, expected range: -0.2954 0.3049
NPP/CRIS RADIANCES CHANNEL 1181 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-0.7878, expected range: -0.1603 0.1687
NPP/CRIS RADIANCES CHANNEL 1189 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-0.3799, expected range: -0.1186 0.1254
NPP/CRIS RADIANCES (97 channels affected) : out of range
Severe: avg_biascorr=0.2247, expected range: 0.2493 0.2727
NPP/CRIS RADIANCES (43 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=12345.0000, expected range: 7532.3137 8057.7195
mhs
ALLSKY METOP-A/MHS RADIANCES CHANNEL 3 : out of range
4 times in the last 10 days for at least one item
Considerable: stdev_norm_fgdepar=0.6510, expected range: 0.2371 0.5273
ALLSKY METOP-A/MHS RADIANCES CHANNEL 4 : out of range
4 times in the last 10 days for at least one item
Considerable: stdev_norm_fgdepar=0.6072, expected range: 0.1773 0.5209
atms
NPP/ATMS RADIANCES (18 channels affected) : out of range
Severe: obs_number=4596.0000, expected range: 9462.2932 11703.6257
Atmospheric Motion Vector
METEOSAT-8/AMV CLOUDY WV1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-60 : out of range
1 times in the last 10 days for at least one item
Slight: avg_fgdepar=5.2928, expected range: 2.6947 4.7890
Slight: stdev_fgdepar=4.1492, expected range: 1.8554 3.8273
Geostationary CSR
GOES-15/IMAGER RADIANCES CHANNEL 2 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: obs_number=58502.0000, expected range: 7085.4568 17964.0568
GOES-15/IMAGER RADIANCES CHANNEL 3 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: obs_number=19192.0000, expected range: 1381.6945 7913.6680
GOES-16/ABI RADIANCES CHANNEL 2 : out of range
2 times in the last 10 days for at least one item
Severe: obs_number=3638.0000, expected range: 38166.3071 53216.0662
GOES-16/ABI RADIANCES CHANNEL 3 : out of range
3 times in the last 10 days for at least one item
Severe: obs_number=3638.0000, expected range: 38172.5777 53214.4889
GOES-16/ABI RADIANCES CHANNEL 4 : out of range
2 times in the last 10 days for at least one item
Severe: obs_number=3638.0000, expected range: 38184.9051 53212.9616
GOES-16/ABI RADIANCES CHANNEL 7 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=1544.0000, expected range: 9299.6086 29194.5196
Radiosondes
HIGH RESO LAND TEMP Q (G/KG) (4 pressure layers affected) : out of range
Severe: obs_number=130.0000, expected range: 181.8990 206.4539
HIGH RESO LAND TEMP WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA : out of range
Considerable: avg_fgdepar=3.0722, expected range: 0.5188 2.1753
synop
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=535.0000, expected range: 1079.4574 1409.1308
MANUAL LAND SYNOP SURFACE PRESSURE (PA) : out of range
17 times in the last 10 days for at least one item
Severely_persistent: obs_number=72.0000, expected range: 81.5082 90.9363
BUFR LAND SYNOP SURFACE PRESSURE (PA) : out of range
13 times in the last 10 days for at least one item
Severely_persistent: rms_fgdepar=78.7296, expected range: 38.1178 52.9338
Severely_persistent: rms_fgdepar=65.9704, expected range: 36.8879 47.8796
Severely_persistent: rms_fgdepar=112.5809, expected range: 37.8754 71.6521
AUTOMATIC LAND SYNOP RH2M (%) : out of range
4 times in the last 10 days for at least one item
Severe: obs_number=74.0000, expected range: 323.7185 346.0462
Considerable: rms_fgdepar=11.0554, expected range: 5.0580 9.0425
buoy
DRIBU WIND VECTOR DIFF (M/S) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_pge=0.8060, expected range: 0.0314 0.7500
DRIFTING BUOYS SURFACE PRESSURE (PA) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=3.8150, expected range: 0.0000 0.0000
Severely_persistent: obs_number=60.0000, expected range: 190.4539 279.6272