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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-07-02 00:00

amsua
NOAA 15 AMSUA ALL SKY RADIANCES CHANNEL 7 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0771, expected range: -0.0587 -0.0342
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1830, expected range: 0.2045 0.2267
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
Slight: stdev_norm_fgdepar=0.6631, expected range: 0.6021 0.6457
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
1 times in the last 10 days for at least one item
Slight: stdev_norm_fgdepar=0.6665, expected range: 0.6083 0.6472
iasi
METOP-B IASI RADIANCES CHANNEL 5403 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0031, expected range: 0.0348 0.0764
METOP-B IASI RADIANCES CHANNEL 5480 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4021, expected range: -0.3581 -0.3402
METOP-C IASI RADIANCES CHANNEL 3248 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0320, expected range: 0.0677 0.1062
METOP-C IASI RADIANCES CHANNEL 5480 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4074, expected range: -0.3696 -0.3469
METOP-C IASI RADIANCES CHANNEL 329 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2732, expected range: -0.2463 -0.2106
METOP-B IASI RADIANCES (12 channels affected) : out of range
2 times in the last 10 days for at least one item
Severe: avg_biascorr=0.2559, expected range: 0.2764 0.2934
METOP-C IASI RADIANCES (197 channels affected) : out of range
Severe: obs_number=15317.0000, expected range: 22772.3502 23160.5248
cris
NOAA20 CRIS RADIANCES CHANNEL 69 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0038, expected range: 0.0186 0.0255
NOAA20 CRIS RADIANCES CHANNEL 70 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.0131, expected range: 0.0023 0.0049
NOAA20 CRIS RADIANCES CHANNEL 71 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0009, expected range: 0.0153 0.0175
NOAA20 CRIS RADIANCES CHANNEL 73 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.0368, expected range: -0.0201 -0.0150
NOAA20 CRIS RADIANCES CHANNEL 76 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.0277, expected range: -0.0163 -0.0093
NOAA20 CRIS RADIANCES CHANNEL 114 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.0453, expected range: -0.0224 0.0034
NOAA20 CRIS RADIANCES (34 channels affected) : out of range
Considerable: obs_number=206.0000, expected range: 0.0000 97.0771
airs
AQUA AIRS RADIANCES CHANNEL 22 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0350, expected range: 0.0008 0.0220
AQUA AIRS RADIANCES CHANNEL 52 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2603, expected range: -0.2073 -0.1941
atms
NOAA20 ATMS RADIANCES CHANNEL 18 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: obs_number=501.0000, expected range: 4.0455 16.2031
NOAA20 ATMS RADIANCES CHANNEL 19 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: obs_number=500.0000, expected range: 2.7332 16.8486
gpsro
All COSMIC2-E5 GPSRO RISING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 989.50 2890.12
SENTINEL-6A GPSRO RISING (14 impact heights affected) : out of range
Slight: obs_number=563.0000, expected range: 1971.7180 4534.6570
Atmospheric Motion Vector
AQUA MODIS CLEAR WV WIND VECTOR DIFF (M/S) (2 pressure layers affected : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=218.0000, expected range: 0.0000 98.3857
GOES-16 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=7637.0000, expected range: 4783.0560 5989.6311