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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

Early delivery 4D-VAR at 2021-12-01 12:00

amsua
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6530, expected range: 0.5650 0.5858
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6498, expected range: 0.5388 0.6006
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6257, expected range: 0.5415 0.5844
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6345, expected range: 0.5236 0.5526
iasi
METOP-B IASI RADIANCES CHANNEL 3168 : out of range
29 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1136, expected range: -0.0538 -0.0045
METOP-B IASI RADIANCES CHANNEL 1579 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0204, expected range: -0.0513 -0.0148
METOP-B IASI RADIANCES CHANNEL 72 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2354, expected range: 0.2792 0.3188
METOP-B IASI RADIANCES CHANNEL 1578 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0411, expected range: -0.1230 -0.0894
METOP-B IASI RADIANCES CHANNEL 358 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1329, expected range: -0.1145 -0.0973
METOP-C IASI RADIANCES CHANNEL 3168 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0677, expected range: -0.0254 0.0283
METOP-C IASI RADIANCES CHANNEL 3248 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1032, expected range: -0.0488 0.0226
METOP-C IASI RADIANCES CHANNEL 292 : out of range
31 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0692, expected range: -0.0537 -0.0495
METOP-C IASI RADIANCES CHANNEL 290 : out of range
29 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0543, expected range: 0.0681 0.0766
METOP-B IASI RADIANCES (14 channels affected) : out of range
Severe: avg_biascorr=0.0708, expected range: 0.0910 0.1033
cris
NOAA20 CRIS RADIANCES CHANNEL 661 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0877, expected range: -0.2946 -0.1934
NOAA20 CRIS RADIANCES CHANNEL 618 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0434, expected range: -0.1255 -0.0864
NOAA20 CRIS RADIANCES CHANNEL 602 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0861, expected range: -0.2015 -0.1508
NOAA20 CRIS RADIANCES CHANNEL 598 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0446, expected range: -0.1878 -0.1228
NOAA20 CRIS RADIANCES CHANNEL 590 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0463, expected range: -0.3616 -0.1927
NOAA20 CRIS RADIANCES CHANNEL 409 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0242, expected range: -0.4197 -0.2016
NOAA20 CRIS RADIANCES CHANNEL 949 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1214, expected range: -0.1997 -0.1570
NOAA20 CRIS RADIANCES CHANNEL 965 : out of range
27 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2295, expected range: -0.2947 -0.2604
NOAA20 CRIS RADIANCES CHANNEL 963 : out of range
35 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0457, expected range: -0.0892 -0.0713
NOAA20 CRIS RADIANCES CHANNEL 657 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1069, expected range: 0.0495 0.0820
NOAA20 CRIS RADIANCES CHANNEL 912 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2058, expected range: 0.1532 0.1746
NOAA20 CRIS RADIANCES (12 channels affected) : out of range
Considerable: stdev_fgdepar=0.2167, expected range: 0.1102 0.1729
airs
AQUA AIRS RADIANCES CHANNEL 1868 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4209, expected range: 0.3627 0.3941
atms
NPP ATMS RADIANCES CHANNEL 14 : out of range
66 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0102, expected range: -0.0830 -0.0619
Severely_persistent: avg_biascorr=-0.2492, expected range: -0.0884 -0.0686
Severely_persistent: stdev_fgdepar=0.4919, expected range: 0.4099 0.4509
NPP ATMS RADIANCES CHANNEL 15 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.8222, expected range: 0.7105 0.7345
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
77 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.6075, expected range: -0.3951 -0.3840
Severely_persistent: avg_biascorr=-0.3941, expected range: -0.3045 -0.2703
Severely_persistent: stdev_fgdepar=0.4521, expected range: 0.3677 0.4014
NOAA20 ATMS RADIANCES CHANNEL 15 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.7874, expected range: 0.6474 0.6617
gpsro
COSMIC2-E1 GPSRO SETTING (24 impact heights affected) : out of range
Considerable: obs_number=368.0000, expected range: 837.3413 1608.1444
Atmospheric Motion Vector
HIMAWARI-8 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
2 times in the last 10 days for at least one item
Considerable: avg_fgdepar=4.6280, expected range: 3.0659 3.8217
GOES-16 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
Considerable: obs_number=1380.0000, expected range: 415.3108 966.3473
Geostationary CSR
All GOES-16 ABI ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 29530.53 41578.36
All GOES-17 GEOS RADIANCES ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 10554.87 76149.96
scatt
All HY-2B SCATTEROMETER Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 141778.64
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1-2 (HPA) : out of range
52 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.0230, expected range: 0.0115 0.0115
amdar
ADS-C WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: rms_fgdepar=9.8355, expected range: 1.4362 7.0198