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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 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=0.0599, expected range: 0.0758 0.0868
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=0.0028, expected range: 0.0167 0.0395
NOAA-19/AMSUA RADIANCES CHANNEL 8 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=1.1107, expected range: 0.6522 0.8381
Severely_persistent: avg_biascorr=1.7776, expected range: 2.4518 3.2215
NOAA-15/AMSUA RADIANCES CHANNEL 10 : out of range
4 times in the last 10 days for at least one item
Considerable: avg_biascorr=0.1602, expected range: 0.1685 0.1921
METOP-A/AMSUA RADIANCES CHANNEL 3 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=2135.0000, expected range: 3246.2662 5320.6903
iasi
METOP-B/IASI RADIANCES CHANNEL 2343 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2311, expected range: 0.1899 0.2152
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=0.1763, expected range: 0.0665 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=0.2146, expected range: 0.1083 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=0.1371, expected range: 0.0148 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=0.1761, expected range: 0.0648 0.1292
METOP-A/IASI RADIANCES (141 channels affected) : out of range
Severe: avg_biascorr=0.0747, expected range: 0.0426 0.0615
METOP-C/IASI RADIANCES (23 channels affected) : out of range
Severe: avg_biascorr=0.1703, expected range: 0.1477 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=0.2189, expected range: 0.0649 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=-1.4246, expected range: -0.2238 0.2275
NPP/CRIS RADIANCES CHANNEL 1181 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-0.4277, expected range: -0.1095 0.1408
NPP/CRIS RADIANCES CHANNEL 1149 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=2.7849, expected range: 0.1091 0.3528
NOAA20/CRIS RADIANCES CHANNEL 63 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3841, expected range: 0.3290 0.3602
NOAA20/CRIS RADIANCES CHANNEL 33 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2082, expected range: 0.1225 0.1623
NOAA20/CRIS RADIANCES CHANNEL 34 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3403, expected range: 0.2692 0.2922
NOAA20/CRIS RADIANCES CHANNEL 35 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3641, expected range: 0.3131 0.3449
NPP/CRIS RADIANCES (98 channels affected) : out of range
Severe: obs_number=9353.0000, expected range: 4346.3415 5467.5910
NOAA20/CRIS RADIANCES CHANNEL 5 : out of range
Considerable: obs_number=1728.0000, expected range: 1901.4033 2536.8745
NOAA20/CRIS RADIANCES CHANNEL 6 : out of range
Considerable: obs_number=1746.0000, expected range: 1911.5240 2537.3649
NOAA20/CRIS RADIANCES CHANNEL 8 : out of range
Considerable: obs_number=1746.0000, expected range: 1910.3640 2537.9694
NOAA20/CRIS RADIANCES CHANNEL 54 : out of range
Considerable: obs_number=1709.0000, expected range: 1895.4737 2544.1704
NOAA20/CRIS RADIANCES CHANNEL 56 : out of range
Considerable: obs_number=1650.0000, expected range: 1856.7375 2581.6601
NOAA20/CRIS RADIANCES CHANNEL 57 : out of range
Considerable: obs_number=1621.0000, expected range: 1833.6017 2593.1093
NOAA20/CRIS RADIANCES CHANNEL 58 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=1696.0000, expected range: 1914.0664 2532.7114
airs
AQUA/AIRS RADIANCES CHANNEL 86 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0936, expected range: -0.0319 0.0461
AQUA/AIRS RADIANCES CHANNEL 138 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1126, expected range: -0.0066 0.0709
mhs
ALLSKY METOP-A/MHS RADIANCES CHANNEL 3 : out of range
Considerable: stdev_norm_fgdepar=0.8845, expected range: 0.6743 0.8337
ssmis
DMSP-18/SSMIS RADIANCES CHANNEL 6 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: obs_number=1871.0000, expected range: 233.4830 1090.6361
DMSP-18/SSMIS RADIANCES CHANNEL 7 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: obs_number=1873.0000, expected range: 232.2058 1101.9719
DMSP-18/SSMIS RADIANCES CHANNEL 10 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: obs_number=1856.0000, expected range: 212.9542 1079.4379
DMSP-18/SSMIS RADIANCES CHANNEL 11 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: obs_number=1856.0000, expected range: 214.1781 1080.6563
Geostationary CSR
GOES-15/IMAGER RADIANCES CHANNEL 2 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: obs_number=123008.0000, expected range: 17093.4242 34387.0031
GOES-15/IMAGER RADIANCES CHANNEL 3 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: obs_number=40781.0000, expected range: 3371.2393 15435.7607
GOES-16/ABI RADIANCES CHANNEL 2 : out of range
Considerable: obs_number=64274.0000, expected range: 79461.0095 102894.9364
GOES-16/ABI RADIANCES CHANNEL 3 : out of range
Considerable: obs_number=64239.0000, expected range: 79523.0308 102913.4557
GOES-16/ABI RADIANCES CHANNEL 4 : out of range
Considerable: obs_number=64464.0000, expected range: 79654.3039 103152.7772
Radiosondes
HIGH RESO LAND TEMP TEMPERATURE (K) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: obs_number=67.0000, expected range: 103.5634 176.3190
synop
BUFR LAND SYNOP SURFACE PRESSURE (PA) : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-6.6667, expected range: 0.0000 0.0000
Severely_persistent: avg_biascorr=15.9846, expected range: -1.9928 1.9928
Severe: obs_number=54.0000, expected range: 55.0000 55.0000
MANUAL LAND SYNOP RH2M (%) : out of range
Severe: obs_number=91.0000, expected range: 65.2802 70.8374
MANUAL LAND SYNOP SURFACE PRESSURE (PA) : out of range
Severe: obs_number=132.0000, expected range: 100.6311 107.7022
buoy
MOORED BUOYS SURFACE PRESSURE (PA) : out of range
7 times in the last 10 days for at least one item
Severely_persistent: obs_number=71.0000, expected range: 101.0294 140.3824