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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-01-11 00:00

amsua
All AQUA AMSUA ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 8565.67 10824.08
iasi
METOP-A IASI RADIANCES CHANNEL 222 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0543, expected range: -0.0313 -0.0134
METOP-A IASI RADIANCES CHANNEL 3452 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5156, expected range: -0.4133 -0.3356
METOP-B IASI RADIANCES CHANNEL 201 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0380, expected range: 0.0546 0.0742
METOP-B IASI RADIANCES CHANNEL 3452 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5071, expected range: -0.3679 -0.2822
METOP-C IASI RADIANCES CHANNEL 195 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1477, expected range: 0.1746 0.1912
METOP-C IASI RADIANCES CHANNEL 214 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2331, expected range: -0.2133 -0.2077
METOP-C IASI RADIANCES CHANNEL 222 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0496, expected range: -0.0274 -0.0194
METOP-C IASI RADIANCES CHANNEL 3244 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0258, expected range: 0.1054 0.1533
METOP-C IASI RADIANCES CHANNEL 3452 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4651, expected range: -0.3612 -0.2547
METOP-B IASI RADIANCES CHANNEL 1574 : out of range
Slight: avg_fgdepar=-0.0636, expected range: -0.0384 0.0491
METOP-B IASI RADIANCES CHANNEL 1578 : out of range
Slight: avg_fgdepar=-0.0766, expected range: -0.0507 0.0503
cris
NOAA20 CRIS RADIANCES CHANNEL 84 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1199, expected range: 0.0861 0.1051
NOAA20 CRIS RADIANCES CHANNEL 1205 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3688, expected range: -0.2823 -0.2411
NOAA20 CRIS RADIANCES CHANNEL 1133 : out of range
4 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.4042, expected range: -0.3519 -0.2951
NPP CRIS RADIANCES CHANNEL 618 : out of range
Considerable: avg_fgdepar=0.0185, expected range: 0.0802 0.1915
NOAA20 CRIS RADIANCES CHANNEL 70 : out of range
Considerable: obs_number=2028.0000, expected range: 2129.8110 2385.5640
NOAA20 CRIS RADIANCES CHANNEL 72 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=1979.0000, expected range: 2103.3658 2392.3842
NOAA20 CRIS RADIANCES CHANNEL 74 : out of range
Considerable: obs_number=1983.0000, expected range: 2111.8082 2389.9418
NOAA20 CRIS RADIANCES CHANNEL 75 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=1963.0000, expected range: 2087.6059 2395.0191
NOAA20 CRIS RADIANCES CHANNEL 76 : out of range
Considerable: obs_number=1997.0000, expected range: 2121.3412 2385.4088
NOAA20 CRIS RADIANCES CHANNEL 78 : out of range
Considerable: obs_number=1954.0000, expected range: 2080.3692 2395.0058
NOAA20 CRIS RADIANCES CHANNEL 79 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=1948.0000, expected range: 2064.0510 2402.0740
NOAA20 CRIS RADIANCES CHANNEL 81 : out of range
Considerable: obs_number=1951.0000, expected range: 2070.6332 2397.6168
airs
All AQUA AIRS ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 4509.99 33617.49
mhs
METOP-A MHS ALLSKY RADIANCES CHANNEL 3 : out of range
30 times in the last 10 days for at least one item
Severely_persistent: avg_norm_fgdepar=0.0719, expected range: -0.0244 0.0288
METOP-A MHS ALLSKY RADIANCES CHANNEL 4 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6506, expected range: 0.1517 0.1765
atms
NPP ATMS RADIANCES (7 channels affected) : out of range
Considerable: obs_number=3621.0000, expected range: 2958.6579 3485.1068
NOAA20 ATMS RADIANCES CHANNEL 10 : out of range
Considerable: avg_biascorr=-0.2100, expected range: -0.2772 -0.2348
gpsro
All COSMIC-6 GPSRO SETTING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 1297.04
All COSMIC2-E6 GPSRO RISING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 674.80 2789.58
COSMIC2-E3 GPSRO SETTING (24 impact heights affected) : out of range
Considerable: obs_number=1471.0000, expected range: 1883.0357 2785.9643