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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2020-06-03 12:00

iasi
METOP-B IASI RADIANCES CHANNEL 217 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1113, expected range: -0.0991 -0.0898
METOP-B IASI RADIANCES (60 channels affected) : out of range
Slight: obs_number=20133.0000, expected range: 21519.1844 22261.9921
cris
NOAA20 CRIS RADIANCES CHANNEL 68 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1000, expected range: 0.1605 0.2244
NOAA20 CRIS RADIANCES CHANNEL 51 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1280, expected range: 0.1707 0.2259
NOAA20 CRIS RADIANCES CHANNEL 60 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1129, expected range: 0.1811 0.2324
NPP CRIS RADIANCES (82 channels affected) : out of range
Severe: obs_number=12358.0000, expected range: 22016.4065 22710.4171
NOAA20 CRIS RADIANCES (58 channels affected) : out of range
Considerable: obs_number=19551.0000, expected range: 22176.3375 23701.0742
saphir
All MEGHA-TROPIQUES SAPHIR ALLSKY ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 24742.48
mwhs2
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 14 : out of range
Considerable: avg_norm_fgdepar=-0.1363, expected range: -0.0658 0.0584
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 6 : out of range
3 times in the last 10 days for at least one item
Slight: avg_norm_fgdepar=-0.1147, expected range: -0.0573 0.1055
mwhs
All FY-3B MWHS ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 3711.08 30092.68
atms
NPP ATMS RADIANCES (11 channels affected) : out of range
Considerable: obs_number=6523.0000, expected range: 7313.3446 9362.3024
NOAA20 ATMS RADIANCES CHANNEL 19 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=3819.0000, expected range: 4146.9548 5454.1040
NOAA20 ATMS RADIANCES CHANNEL 20 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=3912.0000, expected range: 4237.0178 5530.1587
NOAA20 ATMS RADIANCES CHANNEL 21 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=3909.0000, expected range: 4236.7153 5520.3435
NOAA20 ATMS RADIANCES CHANNEL 22 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=4058.0000, expected range: 4383.0561 5681.0616
gpsro
All FY-3C GNOS RISING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 467.59 2312.99
COSMIC2-E3 GPSRO RISING HEIGHT 4 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_norm_fgdepar=0.8830, expected range: 0.9706 1.1441
Atmospheric Motion Vector
All GOES-17 AMV CLOUDY WV3 ALL LAYERS Global : all data missing
Severe: obs_number=0, expected range: 1173.50 3218.75
HIMAWARI-8 AMV VIS1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HP : out of range
Considerable: obs_number=2338.0000, expected range: 1073.9865 1844.2635
GOES-16 AMV CLOUDY WV3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HP : out of range
Considerable: obs_number=1306.0000, expected range: 1784.3003 2889.4497
Geostationary CSR
GOES-16 ABI RADIANCES CHANNEL 2 : out of range
Considerable: obs_number=58057.0000, expected range: 69381.8052 101616.3124
GOES-16 ABI RADIANCES CHANNEL 3 : out of range
Considerable: obs_number=58119.0000, expected range: 69410.5374 101679.2273
GOES-16 ABI RADIANCES CHANNEL 4 : out of range
Considerable: obs_number=58174.0000, expected range: 69700.9400 101799.5306
Radiosondes
All HIGH RESO LAND TEMP ALL LAYERS WMO BLOCK 26 : all data missing
Severely_persistent: obs_number=0, expected range: 76.09 141.91
HIGH RESO LAND TEMP TEMPERATURE (K) (3 pressure layers affected) : out of range
Severe: obs_number=301.0000, expected range: 473.1772 496.3228
All HIGH RESO LAND TEMP ALL LAYERS WMO BLOCK 84 : all data missing
Severe: obs_number=0, expected range: 16.38 208.42
HIGH RESO SEA TEMP Q (G/KG) PRESSURE LAYER 0-300 (HPA) : missing
4 times in the last 10 days for at least one item
Severe: obs_number=0.0000, expected range: 0.0000 299.1216
prof
EUROPEAN WIND PROFILER VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=3833.0000, expected range: 1243.7462 2711.5038
synop
MANUAL LAND SYNOP SURFACE PRESSURE (PA) : out of range
Considerable: obs_number=95.0000, expected range: 114.7145 121.7855