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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2019-09-13 12:00

amsua
AQUA/AMSUA RADIANCES CHANNEL 10 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1288, expected range: 0.1702 0.2476
AQUA/AMSUA RADIANCES CHANNEL 11 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1843, expected range: 0.2386 0.3223
METOP-B/AMSUA RADIANCES CHANNEL 10 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3793, expected range: 0.4291 0.5084
METOP-B/AMSUA RADIANCES CHANNEL 11 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3477, expected range: 0.4024 0.5075
METOP-C/AMSUA RADIANCES CHANNEL 11 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1064, expected range: -0.0058 0.1078
Severely_persistent: avg_biascorr=-0.2071, expected range: -0.0730 0.1920
NOAA-19/AMSUA RADIANCES CHANNEL 10 : out of range
4 times in the last 10 days for at least one item
Considerable: avg_biascorr=0.4087, expected range: 0.0934 0.3250
iasi
METOP-A/IASI RADIANCES CHANNEL 59 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3936, expected range: 0.4498 0.5309
METOP-A/IASI RADIANCES CHANNEL 125 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1518, expected range: 0.1987 0.2664
METOP-A/IASI RADIANCES CHANNEL 131 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2209, expected range: 0.2801 0.3486
METOP-A/IASI RADIANCES CHANNEL 195 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2803, expected range: 0.3262 0.3939
METOP-B/IASI RADIANCES CHANNEL 59 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.5609, expected range: 0.6066 0.6755
METOP-B/IASI RADIANCES CHANNEL 195 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4413, expected range: 0.4794 0.5383
METOP-B/IASI RADIANCES CHANNEL 6458 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.5821, expected range: 3.1175 5.5201
METOP-C/IASI RADIANCES CHANNEL 59 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.5169, expected range: 0.5655 0.6386
METOP-C/IASI RADIANCES CHANNEL 6458 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.5360, expected range: 3.3805 5.2626
METOP-C/IASI RADIANCES CHANNEL 6463 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=2.6405, expected range: 3.5807 4.9767
METOP-C/IASI RADIANCES CHANNEL 6601 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.7695, expected range: 3.1635 5.6839
METOP-A/IASI RADIANCES CHANNEL 55 : out of range
Considerable: stdev_fgdepar=0.3712, expected range: 0.4381 0.6916
METOP-A/IASI RADIANCES CHANNEL 85 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.3167, expected range: 0.3847 0.6066
METOP-B/IASI RADIANCES CHANNEL 49 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.3318, expected range: 0.3888 0.6113
cris
NPP/CRIS RADIANCES (322 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=22253.0000, expected range: 120406.9182 128502.9054
NPP/CRIS RADIANCES CHANNEL 1165 : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=6.2156, expected range: 3.4851 4.5236
NPP/CRIS RADIANCES CHANNEL 1181 : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=5.3060, expected range: 3.3279 4.5010
NPP/CRIS RADIANCES CHANNEL 1221 : out of range
2 times in the last 10 days for at least one item
Severe: stdev_fgdepar=5.2946, expected range: 3.3341 4.5836
ssmis
DMSP-18/SSMIS RADIANCES CHANNEL 4 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0104, expected range: 0.0122 0.0136
DMSP-18/SSMIS RADIANCES CHANNEL 5 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0102, expected range: 0.0121 0.0136
Atmospheric Motion Vector
METEOSAT-8/AMV CLOUDY WV1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 : out of range
Slight: avg_press=217.5928, expected range: 202.1268 215.8717
METEOSAT-8/AMV VIS2 WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA : out of range
1 times in the last 10 days for at least one item
Slight: obs_number=738.0000, expected range: 1082.2901 2708.0433
Geostationary CSR
GOES-15/IMAGER RADIANCES CHANNEL 2 : out of range
4 times in the last 10 days for at least one item
Severe: obs_number=2605.0000, expected range: 6210.7575 6617.2039
Radiosondes
All DROP SONDE TEMPERATURE (K) ALL LAYERS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 388.59
All HIGH RESO SEA TEMP TEMPERATURE (K) ALL LAYERS North West Pacific : all data missing
Severely_persistent: obs_number=0, expected range: 165.22 285.98
HIGH RESO LAND TEMP TEMPERATURE (K) (2 pressure layers affected) : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=1007.0000, expected range: 890.8521 935.6479
HIGH RESO LAND TEMP Q (G/KG) PRESSURE LAYER 0-300 (HPA) : out of range
2 times in the last 10 days for at least one item
Severe: rms_fgdepar=0.0075, expected range: 0.0000 0.0025
synop
BUFR LAND SYNOP RH2M (%) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: obs_number=56.0000, expected range: 58.0000 58.0000
AUTOMATIC LAND SYNOP RH2M (%) : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=581.0000, expected range: 345.0615 457.2719
AUTOMATIC LAND SYNOP SURFACE PRESSURE (PA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=4057.0000, expected range: 2071.5001 3291.0555
ship
BUFR SHIP SYNOP WIND VECTOR DIFF (M/S) : out of range
Severe: obs_number=154.0000, expected range: 563.0171 801.5940
BUFR SHIP SYNOP SURFACE PRESSURE (PA) : out of range
Severe: obs_number=626.0000, expected range: 1072.8755 1292.7911