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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-07-11 00:00

amsua
NOAA-15 AMSUA RADIANCES CHANNEL 13 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6361, expected range: 0.5488 0.5666
NOAA-18 AMSUA RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.1596, expected range: 0.9231 1.0161
NOAA-19 AMSUA RADIANCES CHANNEL 13 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6671, expected range: 0.5703 0.5930
NOAA-19 AMSUA RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.2149, expected range: 0.9405 1.0239
METOP-A AMSUA RADIANCES CHANNEL 13 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6909, expected range: 0.5978 0.6295
METOP-A AMSUA RADIANCES CHANNEL 14 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.2694, expected range: 0.9798 1.0763
METOP-B AMSUA RADIANCES CHANNEL 13 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.6515, expected range: 0.5870 0.5883
METOP-B AMSUA RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.2132, expected range: 0.9618 1.0048
METOP-C AMSUA RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.1347, expected range: 0.8969 0.9838
iasi
METOP-A IASI RADIANCES CHANNEL 252 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4877, expected range: -0.4368 -0.3714
METOP-B IASI RADIANCES CHANNEL 205 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2130, expected range: -0.1960 -0.1813
METOP-A IASI RADIANCES (27 channels affected) : out of range
Severe: avg_biascorr=0.0203, expected range: 0.0678 0.1257
METOP-B IASI RADIANCES (27 channels affected) : out of range
Severe: avg_biascorr=0.0919, expected range: 0.1402 0.1932
METOP-C IASI RADIANCES (28 channels affected) : out of range
4 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.0076, expected range: 0.0426 0.0881
METOP-A IASI RADIANCES (19 channels affected) : out of range
Considerable: stdev_fgdepar=0.4134, expected range: 0.3430 0.3844
METOP-B IASI RADIANCES CHANNEL 131 : out of range
Slight: stdev_fgdepar=0.3214, expected range: 0.2909 0.3133
METOP-B IASI RADIANCES CHANNEL 138 : out of range
Slight: stdev_fgdepar=0.3251, expected range: 0.2876 0.3145
METOP-B IASI RADIANCES CHANNEL 151 : out of range
Slight: stdev_fgdepar=0.3122, expected range: 0.2842 0.3046
cris
NOAA20 CRIS RADIANCES CHANNEL 20 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0246, expected range: 0.0700 0.0967
NOAA20 CRIS RADIANCES CHANNEL 42 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1315, expected range: 0.1561 0.1854
NOAA20 CRIS RADIANCES CHANNEL 45 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0967, expected range: 0.1427 0.1536
NOAA20 CRIS RADIANCES CHANNEL 981 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0823, expected range: -0.1182 -0.1083
NOAA20 CRIS RADIANCES CHANNEL 23 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2285, expected range: 0.2028 0.2105
NOAA20 CRIS RADIANCES CHANNEL 33 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.2738, expected range: 0.1962 0.2098
NOAA20 CRIS RADIANCES CHANNEL 63 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1887, expected range: 0.1252 0.1503
NOAA20 CRIS RADIANCES CHANNEL 64 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1780, expected range: 0.1156 0.1424
NOAA20 CRIS RADIANCES CHANNEL 65 : out of range
3 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.1499, expected range: 0.1078 0.1296
NOAA20 CRIS RADIANCES CHANNEL 66 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.1358, expected range: 0.1065 0.1246
airs
AQUA AIRS RADIANCES CHANNEL 20 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1187, expected range: -0.0532 0.0091
AQUA AIRS RADIANCES CHANNEL 69 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2480, expected range: -0.1456 -0.1366
AQUA AIRS RADIANCES CHANNEL 72 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2761, expected range: -0.1773 -0.1655
AQUA AIRS RADIANCES CHANNEL 92 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5050, expected range: -0.4090 -0.3684
AQUA AIRS RADIANCES CHANNEL 104 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2503, expected range: -0.1800 -0.1276
AQUA AIRS RADIANCES CHANNEL 116 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2672, expected range: -0.2181 -0.1771
AQUA AIRS RADIANCES CHANNEL 180 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.8570, expected range: -0.7228 -0.6496
AQUA AIRS RADIANCES CHANNEL 98 : out of range
3 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.0410, expected range: 0.0053 0.0916
AQUA AIRS RADIANCES CHANNEL 1921 : out of range
Slight: stdev_fgdepar=0.2249, expected range: 0.1906 0.2179
mwhs2
FY-3D MWHS2 ALLSKY RADIANCES (11 channels affected) : out of range
2 times in the last 10 days for at least one item
Severe: obs_number=27910.0000, expected range: 50628.7906 61005.0844
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 11 : out of range
Considerable: stdev_norm_fgdepar=0.7631, expected range: 0.8255 0.9387
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 7 : out of range
Considerable: stdev_norm_fgdepar=0.6110, expected range: 0.7207 0.9133
atms
NPP ATMS RADIANCES CHANNEL 15 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.2344, expected range: 1.0008 1.0222
NOAA20 ATMS RADIANCES CHANNEL 15 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.2489, expected range: 0.9714 0.9906
gpsro
COSMIC2-E1 GPSRO SETTING HEIGHT 6-8 KM : out of range
Considerable: obs_number=844.0000, expected range: 516.2943 777.0807
COSMIC2-E1 GPSRO SETTING HEIGHT 8-10 KM : out of range
Considerable: obs_number=794.0000, expected range: 489.0536 723.4464
mwri
FY-3D MWRI RADIANCES (6 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=6429.0000, expected range: 13660.4028 16063.8472