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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2020-06-04 12:00

iasi
METOP-B IASI RADIANCES CHANNEL 217 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1117, expected range: -0.0991 -0.0910
METOP-B IASI RADIANCES CHANNEL 72 : out of range
Considerable: stdev_fgdepar=0.4652, expected range: 0.3811 0.4341
cris
NPP CRIS RADIANCES CHANNEL 33 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0840, expected range: 0.0917 0.0961
NPP CRIS RADIANCES CHANNEL 48 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0547, expected range: 0.0864 0.1267
NPP CRIS RADIANCES CHANNEL 257 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1517, expected range: 0.0723 0.3543
NOAA20 CRIS RADIANCES CHANNEL 68 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1009, expected range: 0.1605 0.2159
NOAA20 CRIS RADIANCES CHANNEL 51 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1183, expected range: 0.1707 0.2173
NOAA20 CRIS RADIANCES CHANNEL 60 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1136, expected range: 0.1811 0.2239
mwhs2
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 6 : out of range
4 times in the last 10 days for at least one item
Slight: stdev_norm_fgdepar=0.8009, expected range: 0.6800 0.7681
mwhs
All FY-3B MWHS ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 13353.98 21638.32
gpsro
All FY-3C GNOS RISING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 467.59 2312.99
SPIRE LEMUR 3U GPSRO RISING HEIGHT 3 : out of range
1 times in the last 10 days for at least one item
Severe: stdev_norm_fgdepar=0.2976, expected range: 0.0850 0.1782
Atmospheric Motion Vector
HIMAWARI-8 AMV VIS1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HP : out of range
Considerable: obs_number=1274.0000, expected range: 755.1296 1142.8704
GOES-17 AMV VIS1 WIND VECTOR DIFF (M/S) (2 pressure layers affected) : out of range
Considerable: obs_number=567.0000, expected range: 1034.5916 1623.9372
Radiosondes
HIGH RESO LAND TEMP Q (G/KG) PRESSURE LAYER 900-1200 (HPA) : out of range
Severe: rms_fgdepar=2.9332, expected range: 0.0916 1.4695
HIGH RESO LAND TEMP TEMPERATURE (K) PRESSURE LAYER 300-600 (HPA) : out of range
Severe: rms_fgdepar=3.1318, expected range: 0.0000 1.3020
All HIGH RESO LAND TEMP ALL LAYERS WMO BLOCK 84 : all data missing
Severe: obs_number=0, expected range: 26.39 200.94
HIGH RESO SEA TEMP Q (G/KG) PRESSURE LAYER 0-300 (HPA) : missing
1 times in the last 10 days for at least one item
Severe: obs_number=0.0000, expected range: 0.0000 296.3036
Severe: obs_number=0.0000, expected range: 78.4090 466.3481
All HIGH RESO SEA TEMP ALL LAYERS North pole : all data missing
Severe: obs_number=0, expected range: 152.09 657.16
LAND TEMP WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: obs_number=283.0000, expected range: 200.8590 249.3910
LAND TEMP WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : out of range
Considerable: obs_number=60.0000, expected range: 31.9499 48.8001
HIGH RESO LAND TEMP WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=63.0000, expected range: 93.9643 151.0357
Considerable: obs_number=122.0000, expected range: 31.2697 76.7303
HIGH RESO LAND TEMP WIND VECTOR DIFF (M/S) (3 pressure layers affected : out of range
Considerable: obs_number=9675.0000, expected range: 7223.0012 8163.4988
HIGH RESO LAND TEMP Q (G/KG) PRESSURE LAYER 600-900 (HPA) : out of range
Considerable: obs_number=1014.0000, expected range: 886.4106 947.5894
synop
BUFR LAND SYNOP SURFACE PRESSURE (PA) : out of range
Severe: obs_number=1452.0000, expected range: 1623.2253 1649.2747
Severe: obs_number=1565.0000, expected range: 1813.0913 1866.2420
Considerable: obs_number=446.0000, expected range: 501.2263 552.7737
MANUAL LAND SYNOP SURFACE PRESSURE (PA) : out of range
Considerable: obs_number=778.0000, expected range: 677.1727 715.9384
ship
BUFR SHIP SYNOP SURFACE PRESSURE (PA) : out of range
1 times in the last 10 days for at least one item
Considerable: rms_fgdepar=253.9239, expected range: 47.4763 170.3478
Considerable: obs_number=373.0000, expected range: 437.6807 502.4370