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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2020-05-30 12:00

amsua
NOAA-19 AMSUA RADIANCES CHANNEL 14 : out of range
4 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=1.1628, expected range: 0.8721 1.0582
AQUA AMSUA RADIANCES (6 channels affected) : out of range
Considerable: obs_number=4193.0000, expected range: 4771.3038 6273.8727
iasi
METOP-C IASI RADIANCES CHANNEL 3446 : out of range
Considerable: stdev_fgdepar=1.0297, expected range: 0.5637 0.8389
METOP-C IASI RADIANCES CHANNEL 3658 : out of range
Considerable: stdev_fgdepar=1.0377, expected range: 0.6860 0.9074
METOP-B IASI RADIANCES CHANNEL 457 : out of range
Slight: avg_fgdepar=0.0665, expected range: 0.0136 0.0522
cris
NPP CRIS RADIANCES (17 channels affected) : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1896, expected range: 0.2092 0.2163
NPP CRIS RADIANCES CHANNEL 39 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2709, expected range: 0.2989 0.3341
NPP CRIS RADIANCES CHANNEL 42 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2452, expected range: 0.3087 0.3108
NPP CRIS RADIANCES CHANNEL 54 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2344, expected range: 0.2742 0.3032
NPP CRIS RADIANCES CHANNEL 60 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1901, expected range: 0.2239 0.2589
NOAA20 CRIS RADIANCES CHANNEL 45 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1371, expected range: 0.1978 0.2327
NOAA20 CRIS RADIANCES CHANNEL 48 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1359, expected range: 0.2203 0.2495
mwhs2
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 13 : out of range
Severe: stdev_norm_fgdepar=0.8015, expected range: 0.5595 0.6963
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 11 : out of range
Considerable: obs_number=276.0000, expected range: 1020.8275 3436.7823
mwhs
FY-3B MWHS RADIANCES CHANNEL 3 : out of range
Considerable: obs_number=5866.0000, expected range: 6445.4338 7441.1544
FY-3B MWHS RADIANCES CHANNEL 4 : out of range
Considerable: obs_number=5874.0000, expected range: 6452.2890 7447.5934
atms
NPP ATMS RADIANCES CHANNEL 6 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=5435.0000, expected range: 6288.7944 7956.1468
NPP ATMS RADIANCES CHANNEL 7 : out of range
Considerable: obs_number=5603.0000, expected range: 6458.0908 8132.9681
NPP ATMS RADIANCES CHANNEL 8 : out of range
Considerable: obs_number=6115.0000, expected range: 6837.9047 8328.2129
NOAA20 ATMS RADIANCES CHANNEL 6 : out of range
Considerable: obs_number=5460.0000, expected range: 6352.2823 7941.0119
NOAA20 ATMS RADIANCES CHANNEL 7 : out of range
Considerable: obs_number=5627.0000, expected range: 6515.3837 8125.0869
NOAA20 ATMS RADIANCES CHANNEL 8 : out of range
Considerable: obs_number=6159.0000, expected range: 6789.0786 8377.6273
gpsro
All FY-3C GNOS RISING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 467.59 2312.99
All COSMIC2-E3 GPSRO RISING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 892.68 2275.11
All COSMIC2-E5 GPSRO RISING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 648.69 3335.12
All COSMIC2-E6 GPSRO RISING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 712.14 3218.17
METOP-A GRAS SETTING HEIGHT 1 : out of range
Considerable: obs_number=335.0000, expected range: 407.0178 654.2763
TERRASAR-X GPSRO SETTING (9 impact heights affected) : out of range
Considerable: obs_number=207.0000, expected range: 462.7367 1322.8058
Atmospheric Motion Vector
GOES-16 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
Severe: stdev_fgdepar=1.4015, expected range: 0.7483 1.1016
METEOSAT-8 AMV CLOUDY WV2 WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-60 : out of range
Slight: avg_press=434.8393, expected range: 392.9832 412.6673
Radiosondes
All HIGH RESO LAND TEMP ALL LAYERS WMO BLOCK 84 : all data missing
Severely_persistent: obs_number=0, expected range: 16.61 210.59
HIGH RESO LAND TEMP TEMPERATURE (K) PRESSURE LAYER 0-300 (HPA) : missing
Severe: obs_number=0.0000, expected range: 23.5899 411.7310
HIGH RESO LAND TEMP TEMPERATURE (K) (3 pressure layers affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=952.0000, expected range: 1101.5425 1154.4575
HIGH RESO LAND TEMP TEMPERATURE (K) (2 pressure layers affected) : out of range
Considerable: obs_number=447.0000, expected range: 366.8096 388.1904
HIGH RESO LAND TEMP Q (G/KG) (3 pressure layers affected) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=92.0000, expected range: 158.5089 202.2411
amdar
All AMDAR WIND VECTOR DIFF (M/S) ALL LAYERS North West Pacific : all data missing
Severe: obs_number=0, expected range: 5.55 325.12