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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2019-08-17 12:00

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=0.0632, expected range: 0.0758 0.0868
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=0.0632, expected range: 0.1061 0.1441
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=2.0075, expected range: 2.4518 3.2226
Severely_persistent: avg_biascorr=1.3063, expected range: 0.6679 0.8381
METOP-A/AMSUA RADIANCES CHANNEL 3 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=1412.0000, expected range: 2800.9952 5676.9179
iasi
METOP-A/IASI RADIANCES CHANNEL 179 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1285, expected range: -0.0592 0.0639
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=0.1603, expected range: 0.0113 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=0.2105, expected range: 0.0635 0.1292
METOP-C/IASI RADIANCES CHANNEL 180 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2692, expected range: 0.1475 0.2205
METOP-C/IASI RADIANCES (23 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.1724, expected range: 0.1471 0.1579
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=0.1880, expected range: 0.0668 0.1272
NPP/CRIS RADIANCES CHANNEL 1181 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.2957, expected range: -0.1095 0.1408
NPP/CRIS RADIANCES CHANNEL 1189 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.7270, expected range: -0.1422 0.1834
NPP/CRIS RADIANCES CHANNEL 1149 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=3.9185, expected range: 0.1540 0.3528
NPP/CRIS RADIANCES (89 channels affected) : out of range
Severe: obs_number=9087.0000, expected range: 4411.0438 5467.5910
NOAA20/CRIS RADIANCES CHANNEL 626 : out of range
Considerable: stdev_fgdepar=0.4743, expected range: 0.2838 0.4276
NOAA20/CRIS RADIANCES CHANNEL 1 : out of range
Slight: obs_number=22870.0000, expected range: 22918.3788 23367.3435
NOAA20/CRIS RADIANCES CHANNEL 15 : out of range
Slight: obs_number=22757.0000, expected range: 22827.4795 23364.0760
NOAA20/CRIS RADIANCES CHANNEL 16 : out of range
Slight: obs_number=22848.0000, expected range: 22910.2853 23369.6591
NOAA20/CRIS RADIANCES CHANNEL 17 : out of range
Slight: obs_number=22852.0000, expected range: 22911.2200 23370.1689
NOAA20/CRIS RADIANCES CHANNEL 20 : out of range
Slight: obs_number=22757.0000, expected range: 22847.4704 23378.8074
NOAA20/CRIS RADIANCES CHANNEL 46 : out of range
Slight: obs_number=22866.0000, expected range: 22912.2588 23369.9079
NOAA20/CRIS RADIANCES CHANNEL 49 : out of range
Slight: obs_number=22758.0000, expected range: 22823.4597 23353.1514
NOAA20/CRIS RADIANCES CHANNEL 52 : out of range
Slight: obs_number=22740.0000, expected range: 22831.8152 23364.5181
NOAA20/CRIS RADIANCES CHANNEL 55 : out of range
Slight: obs_number=22782.0000, expected range: 22865.0366 23379.6300
airs
AQUA/AIRS RADIANCES CHANNEL 138 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1099, expected range: -0.0065 0.0709
AQUA/AIRS RADIANCES CHANNEL 86 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1003, expected range: -0.0367 0.0461
mhs
ALLSKY METOP-A/MHS RADIANCES CHANNEL 3 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_norm_fgdepar=0.9118, expected range: 0.6534 0.8589
Geostationary CSR
GOES-15/IMAGER RADIANCES CHANNEL 2 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: obs_number=121333.0000, expected range: 17067.4231 34387.0031
GOES-15/IMAGER RADIANCES CHANNEL 3 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: obs_number=34083.0000, expected range: 3295.4228 15476.1448
GOES-16/ABI RADIANCES CHANNEL 2 : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=14088.0000, expected range: 78650.8810 103466.4163
GOES-16/ABI RADIANCES CHANNEL 3 : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=14094.0000, expected range: 78715.2428 103482.7572
GOES-16/ABI RADIANCES CHANNEL 4 : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=14145.0000, expected range: 78859.0786 103707.8943
GOES-16/ABI RADIANCES CHANNEL 7 : out of range
Considerable: obs_number=5865.0000, expected range: 20473.1591 56639.6304
Radiosondes
HIGH RESO LAND TEMP TEMPERATURE (K) (4 pressure layers affected) : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0000, expected range: 0.4008 0.6164
HIGH RESO LAND TEMP Q (G/KG) (3 pressure layers affected) : out of range
7 times in the last 10 days for at least one item
Severely_persistent: obs_number=93.0000, expected range: 181.6505 197.7613
synop
BUFR LAND SYNOP SURFACE PRESSURE (PA) : out of range
14 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=11.9772, expected range: -2.9234 3.0696
AUTOMATIC LAND SYNOP SURFACE PRESSURE (PA) : out of range
2 times in the last 10 days for at least one item
Severe: obs_number=2043.0000, expected range: 2625.5200 3082.0356
Severe: avg_biascorr=-4.7143, expected range: 0.0000 0.0000