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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-12-01 12:00

AMSUA Pacific RARS
All NOAA-18 AMSUA ALL SKY CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 4810.49
All NOAA-19 AMSUA ALL SKY CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 2211.42
iasi
METOP-C IASI RADIANCES CHANNEL 1658 : out of range
Considerable: avg_biascorr=0.0778, expected range: 0.0948 0.1261
cris
NPP CRIS RADIANCES CHANNEL 20 : out of range
24 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1945, expected range: 0.2320 0.2329
NPP CRIS RADIANCES CHANNEL 26 : out of range
42 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1703, expected range: 0.1935 0.2043
NOAA20 CRIS RADIANCES CHANNEL 1189 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1185, expected range: 0.0224 0.0736
NOAA20 CRIS RADIANCES CHANNEL 26 : out of range
49 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2316, expected range: 0.3399 0.4708
NOAA20 CRIS RADIANCES CHANNEL 54 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1832, expected range: 0.2296 0.2812
Severely_persistent: avg_biascorr=0.3106, expected range: 0.2363 0.2513
NOAA20 CRIS RADIANCES CHANNEL 57 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1632, expected range: 0.1986 0.2416
NOAA20 CRIS RADIANCES CHANNEL 60 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1392, expected range: 0.1681 0.2014
NOAA20 CRIS RADIANCES CHANNEL 61 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1271, expected range: 0.1581 0.1939
NOAA20 CRIS RADIANCES CHANNEL 63 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1460, expected range: 0.1691 0.1996
NOAA20 CRIS RADIANCES CHANNEL 147 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2276, expected range: -0.1952 -0.1833
NOAA20 CRIS RADIANCES CHANNEL 36 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3244, expected range: 0.2321 0.2812
NOAA20 CRIS RADIANCES CHANNEL 39 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3746, expected range: 0.2794 0.3166
NOAA20 CRIS RADIANCES CHANNEL 42 : out of range
31 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3526, expected range: 0.2779 0.3114
NOAA20 CRIS RADIANCES CHANNEL 45 : out of range
27 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3358, expected range: 0.2764 0.2996
NOAA20 CRIS RADIANCES CHANNEL 51 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3050, expected range: 0.2371 0.2562
NOAA20 CRIS RADIANCES CHANNEL 70 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0804, expected range: 0.0271 0.0532
NOAA20 CRIS RADIANCES CHANNEL 71 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0913, expected range: 0.0534 0.0621
NOAA20 CRIS RADIANCES CHANNEL 113 : out of range
42 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1166, expected range: 0.0840 0.1003
NOAA20 CRIS RADIANCES CHANNEL 20 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1546, expected range: 0.1867 0.1978
NPP CRIS RADIANCES (25 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.2815, expected range: 0.2220 0.2313
NOAA20 CRIS RADIANCES (21 channels affected) : out of range
3 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.2029, expected range: 0.1553 0.1658
Atmospheric Motion Vector
All HIMAWARI-8 AMV CLOUDY WV1 ALL LAYERS Global : all data missing
Severely_persistent: obs_number=0, expected range: 274.60 1208.90
All NOAA-18 AVHRR IR ALL LAYERS Global : all data missing
Severe: obs_number=0, expected range: 42.77 609.18
amdar
TAMDAR TEMPERATURE (K) (2 pressure layers affected) : missing
Severe: obs_number=0.0000, expected range: 0.0000 341.4995