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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2019-08-17 18:00

amsua
AQUA/AMSUA RADIANCES CHANNEL 11 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1938, expected range: 0.2095 0.2245
METOP-A/AMSUA RADIANCES CHANNEL 10 : out of range
Severe: stdev_fgdepar=0.2395, expected range: 0.1986 0.2255
METOP-A/AMSUA RADIANCES CHANNEL 9 : out of range
Considerable: stdev_fgdepar=0.1935, expected range: 0.1501 0.1823
METOP-A/AMSUA RADIANCES CHANNEL 13 : out of range
Considerable: avg_biascorr=0.1884, expected range: 0.2182 0.3041
iasi
METOP-A/IASI RADIANCES CHANNEL 5399 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4084, expected range: 0.2426 0.3319
METOP-B/IASI RADIANCES CHANNEL 178 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1637, expected range: 0.0064 0.1108
METOP-B/IASI RADIANCES CHANNEL 236 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2121, expected range: 0.1440 0.1886
METOP-C/IASI RADIANCES CHANNEL 236 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1872, expected range: 0.1007 0.1537
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=0.0805, expected range: -0.0247 0.0393
cris
NPP/CRIS RADIANCES CHANNEL 622 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.1844, expected range: 0.0436 0.1599
NPP/CRIS RADIANCES CHANNEL 1149 : out of range
54 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=5.3371, expected range: -0.3076 0.3155
Severely_persistent: stdev_fgdepar=1.9233, expected range: 0.0709 0.3529
NPP/CRIS RADIANCES CHANNEL 1157 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=3.1694, expected range: -0.2954 0.3049
NPP/CRIS RADIANCES CHANNEL 1189 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.2486, expected range: -0.1186 0.1254
NPP/CRIS RADIANCES (16 channels affected) : out of range
Severe: obs_number=5022.0000, expected range: 7584.7569 8057.7195
NOAA20/CRIS RADIANCES CHANNEL 6 : out of range
1 times in the last 10 days for at least one item
Slight: obs_number=11106.0000, expected range: 11199.0199 11856.8412
NOAA20/CRIS RADIANCES CHANNEL 8 : out of range
1 times in the last 10 days for at least one item
Slight: obs_number=11089.0000, expected range: 11162.9952 11869.9492
NOAA20/CRIS RADIANCES CHANNEL 18 : out of range
1 times in the last 10 days for at least one item
Slight: obs_number=11150.0000, expected range: 11234.3293 11844.7262
NOAA20/CRIS RADIANCES CHANNEL 20 : out of range
1 times in the last 10 days for at least one item
Slight: obs_number=11203.0000, expected range: 11263.3429 11840.0269
NOAA20/CRIS RADIANCES CHANNEL 52 : out of range
1 times in the last 10 days for at least one item
Slight: obs_number=11203.0000, expected range: 11262.2289 11825.3822
NOAA20/CRIS RADIANCES CHANNEL 55 : out of range
1 times in the last 10 days for at least one item
Slight: obs_number=11221.0000, expected range: 11279.6379 11831.5402
atms
NPP/ATMS RADIANCES (19 channels affected) : out of range
Considerable: obs_number=2073.0000, expected range: 2752.5108 3974.4103
Geostationary CSR
GOES-15/IMAGER RADIANCES CHANNEL 2 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: obs_number=58648.0000, expected range: 7089.6441 17964.0568
GOES-15/IMAGER RADIANCES CHANNEL 3 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: obs_number=15843.0000, expected range: 1395.4265 7913.6680
GOES-16/ABI RADIANCES CHANNEL 2 : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=7074.0000, expected range: 38481.7099 53029.8901
GOES-16/ABI RADIANCES CHANNEL 3 : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=7076.0000, expected range: 38488.5993 53027.7207
Slight: stdev_fgdepar=0.5925, expected range: 0.3429 0.5650
GOES-16/ABI RADIANCES CHANNEL 4 : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=7077.0000, expected range: 38500.8506 53026.1094
GOES-16/ABI RADIANCES CHANNEL 7 : out of range
Considerable: obs_number=2959.0000, expected range: 9526.3467 29116.8072
Radiosondes
All LAND TEMP Q (G/KG) ALL LAYERS Missing
All HIGH RESO LAND TEMP Q (G/KG) ALL LAYERS Missing
pilot
All LAND PILOT WIND VECTOR DIFF (M/S) ALL LAYERS Missing
synop
AUTOMATIC LAND SYNOP SURFACE PRESSURE (PA) : out of range
6 times in the last 10 days for at least one item
Severely_persistent: obs_number=641.0000, expected range: 1057.9075 1346.7592
MANUAL LAND SYNOP SURFACE PRESSURE (PA) : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=260.0000, expected range: 25.5446 144.2314
BUFR LAND SYNOP SURFACE PRESSURE (PA) : out of range
12 times in the last 10 days for at least one item
Severely_persistent: rms_fgdepar=81.7084, expected range: 42.3442 54.7671
Severely_persistent: rms_fgdepar=115.7914, expected range: 41.5567 69.1329
buoy
DRIFTING BUOYS SURFACE PRESSURE (PA) : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=4.3373, expected range: 0.0000 0.0000