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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2019-09-12 12:00

amsua
AQUA/AMSUA RADIANCES CHANNEL 10 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1219, expected range: 0.1702 0.2490
AQUA/AMSUA RADIANCES CHANNEL 11 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1823, expected range: 0.2386 0.3202
METOP-B/AMSUA RADIANCES CHANNEL 10 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3865, expected range: 0.4291 0.5084
METOP-B/AMSUA RADIANCES CHANNEL 11 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3458, expected range: 0.4024 0.5075
METOP-C/AMSUA RADIANCES CHANNEL 11 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1022, expected range: -0.0058 0.1078
iasi
METOP-A/IASI RADIANCES CHANNEL 59 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4051, expected range: 0.4498 0.5355
METOP-A/IASI RADIANCES CHANNEL 125 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1548, expected range: 0.1987 0.2695
METOP-A/IASI RADIANCES CHANNEL 131 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2263, expected range: 0.2801 0.3528
METOP-A/IASI RADIANCES CHANNEL 195 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2849, expected range: 0.3262 0.3971
METOP-B/IASI RADIANCES CHANNEL 59 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.5579, expected range: 0.6066 0.6790
METOP-B/IASI RADIANCES CHANNEL 195 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4458, expected range: 0.4794 0.5408
Severely_persistent: avg_biascorr=0.4404, expected range: 0.4885 0.5807
METOP-B/IASI RADIANCES CHANNEL 6458 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.4576, expected range: 3.1175 5.5201
METOP-C/IASI RADIANCES CHANNEL 59 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.5218, expected range: 0.5655 0.6408
METOP-C/IASI RADIANCES CHANNEL 6458 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.5174, expected range: 3.3805 5.2626
METOP-C/IASI RADIANCES CHANNEL 6463 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=2.5852, expected range: 3.5807 4.9767
METOP-C/IASI RADIANCES CHANNEL 6601 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.7785, expected range: 3.1635 5.6839
METOP-B/IASI RADIANCES (21 channels affected) : out of range
Considerable: avg_biascorr=0.4788, expected range: 0.2950 0.4377
METOP-B/IASI RADIANCES CHANNEL 49 : out of range
Considerable: stdev_fgdepar=0.3290, expected range: 0.3888 0.6113
METOP-B/IASI RADIANCES CHANNEL 61 : out of range
Considerable: stdev_fgdepar=0.3210, expected range: 0.3749 0.5774
cris
NPP/CRIS RADIANCES (324 channels affected) : out of range
Severe: obs_number=19139.0000, expected range: 120395.8874 128529.7793
airs
AQUA/AIRS RADIANCES CHANNEL 159 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1770, expected range: 0.2191 0.2946
atms
NPP/ATMS RADIANCES (20 channels affected) : out of range
Considerable: obs_number=11246.0000, expected range: 12127.6257 14838.6446
ssmis
DMSP-18/SSMIS RADIANCES CHANNEL 4 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0106, expected range: 0.0122 0.0136
DMSP-18/SSMIS RADIANCES CHANNEL 5 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0105, expected range: 0.0121 0.0136
DMSP-18/SSMIS RADIANCES CHANNEL 3 : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=11239.0000, expected range: 3210.0736 9301.1385
Atmospheric Motion Vector
GOES-16/AMV VIS1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
Considerable: obs_number=15318.0000, expected range: 17804.8061 24101.3051
METEOSAT-8/AMV VIS2 WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA : out of range
Slight: obs_number=820.0000, expected range: 1094.8850 2686.5887
Geostationary CSR
GOES-15/IMAGER RADIANCES CHANNEL 2 : out of range
2 times in the last 10 days for at least one item
Severe: obs_number=2336.0000, expected range: 6155.3803 6617.2039
Radiosondes
All DROP SONDE TEMPERATURE (K) ALL LAYERS Missing
All HIGH RESO SEA TEMP TEMPERATURE (K) ALL LAYERS Missing
LAND TEMP TEMPERATURE (K) PRESSURE LAYER 900-1200 (HPA) : out of range
Severe: obs_number=108.0000, expected range: 31.7141 68.2859
HIGH RESO LAND TEMP TEMPERATURE (K) (3 pressure layers affected) : out of range
Severe: obs_number=179.0000, expected range: 87.3379 96.9121
HIGH RESO LAND TEMP WIND VECTOR DIFF (M/S) (3 pressure layers affected : out of range
Severe: obs_number=262.0000, expected range: 167.8752 186.7498
HIGH RESO LAND TEMP Q (G/KG) (2 pressure layers affected) : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=97.0000, expected range: 184.1006 198.6494
HIGH RESO LAND TEMP TEMPERATURE (K) (4 pressure layers affected) : out of range
Considerable: avg_biascorr=0.5468, expected range: -0.2042 0.2250
pilot
LAND PILOT WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : out of range
Considerable: obs_number=189.0000, expected range: 214.6671 282.7447
synop
BUFR LAND SYNOP SURFACE PRESSURE (PA) : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0000, expected range: -13.9952 -7.0834
BUFR LAND SYNOP RH2M (%) : out of range
6 times in the last 10 days for at least one item
Severely_persistent: obs_number=286.0000, expected range: 400.2819 540.2737
MANUAL LAND SYNOP SURFACE PRESSURE (PA) : out of range
Severe: obs_number=152.0000, expected range: 48.3590 53.7521
AUTOMATIC LAND SYNOP SURFACE PRESSURE (PA) : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=88.0000, expected range: 43.6963 69.4148
ship
AUTOMATIC SHIP WIND VECTOR DIFF (M/S) : out of range
Considerable: avg_fgdepar=3.1967, expected range: 0.4613 2.2748
ABBREVIATED SHIP WIND VECTOR DIFF (M/S) : out of range
Slight: rms_fgdepar=7.3176, expected range: 1.2865 6.5150
buoy
DRIFTING BUOYS SURFACE PRESSURE (PA) : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-1.7417, expected range: 0.0000 0.0000