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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-10-27 00:00

amsua
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_norm_fgdepar=0.6019, expected range: 0.4747 0.5504
iasi
METOP-B IASI RADIANCES CHANNEL 2907 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.9939, expected range: 0.0000 0.3437
METOP-B IASI RADIANCES CHANNEL 3168 : out of range
3 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.6569, expected range: 0.4436 0.5328
METOP-B IASI RADIANCES CHANNEL 3509 : out of range
3 times in the last 10 days for at least one item
Severe: stdev_fgdepar=1.3689, expected range: 0.7304 1.0597
METOP-B IASI RADIANCES CHANNEL 286 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=2503.0000, expected range: 1986.9686 2337.0314
METOP-B IASI RADIANCES CHANNEL 316 : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=1993.0000, expected range: 1562.8055 1897.1945
METOP-B IASI RADIANCES CHANNEL 323 : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=2406.0000, expected range: 1967.3677 2222.6323
METOP-B IASI RADIANCES CHANNEL 389 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=2220.0000, expected range: 1707.9214 2101.6786
METOP-B IASI RADIANCES CHANNEL 414 : out of range
Considerable: obs_number=1865.0000, expected range: 1490.8812 1783.5188
METOP-B IASI RADIANCES CHANNEL 3252 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=1.3467, expected range: 0.6355 1.0579
METOP-B IASI RADIANCES CHANNEL 3446 : out of range
Considerable: stdev_fgdepar=1.2530, expected range: 0.6544 1.0445
METOP-B IASI RADIANCES CHANNEL 3452 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=1.2324, expected range: 0.6473 0.9909
Slight: avg_fgdepar=0.0658, expected range: -0.0262 0.0407
METOP-B IASI RADIANCES CHANNEL 3575 : out of range
3 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=1.1522, expected range: 0.7857 0.9971
METOP-C IASI RADIANCES CHANNEL 1643 : out of range
Considerable: avg_biascorr=0.3361, expected range: 0.2877 0.3197
METOP-B IASI RADIANCES CHANNEL 3248 : out of range
1 times in the last 10 days for at least one item
Slight: avg_fgdepar=0.0390, expected range: -0.0263 0.0238
cris
NOAA20 CRIS RADIANCES CHANNEL 114 : out of range
3 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.1103, expected range: 0.0825 0.1002
NOAA20 CRIS RADIANCES CHANNEL 912 : out of range
4 times in the last 10 days for at least one item
Considerable: obs_number=1700.0000, expected range: 1214.9040 1581.8960
NOAA20 CRIS RADIANCES CHANNEL 929 : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=1730.0000, expected range: 1254.2136 1623.7864
airs
AQUA AIRS RADIANCES CHANNEL 201 : out of range
4 times in the last 10 days for at least one item
Slight: avg_fgdepar=0.0121, expected range: -0.0130 0.0070
atms
NPP ATMS RADIANCES CHANNEL 21 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2070, expected range: 0.1522 0.1757
NPP ATMS RADIANCES CHANNEL 15 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.8293, expected range: 0.6289 0.7315
NPP ATMS RADIANCES CHANNEL 20 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3037, expected range: 0.2536 0.2540
NPP ATMS RADIANCES CHANNEL 22 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.6644, expected range: 0.5719 0.6123
NOAA20 ATMS RADIANCES CHANNEL 15 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.8035, expected range: 0.5538 0.6636
NOAA20 ATMS RADIANCES CHANNEL 19 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1081, expected range: -0.1609 -0.1489
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.4336, expected range: 0.3347 0.3991
gpsro
All TERRASAR-X GPSRO SETTING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 113.78 1440.62
COSMIC2-E1 GPSRO RISING HEIGHT 4-6 KM : out of range
Considerable: obs_number=2184.0000, expected range: 2587.3325 4032.2925
mwri
FY-3D MWRI RADIANCES (6 channels affected) : out of range
Considerable: obs_number=2753.0000, expected range: 3135.7987 3898.5763
ASCAT EARS
All METOP-A ASCAT Global : all data missing
Severe: obs_number=0, expected range: 320.00 320.00