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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

Delayed cut-off 4DVAR at 2019-10-10 12:00

iasi
METOP-B/IASI RADIANCES (420 channels affected) : out of range
Severe: obs_number=8712.0000, expected range: 21800.0675 23401.4460
METOP-B/IASI RADIANCES (58 channels affected) : out of range
Slight: stdev_fgdepar=0.2760, expected range: 0.2583 0.2726
mwhs
FY-3B/MWHS RADIANCES CHANNEL 5 : out of range
Considerable: avg_biascorr=-2.0328, expected range: -1.8898 -1.4129
atms
NPP/ATMS RADIANCES (7 channels affected) : out of range
Considerable: obs_number=3540.0000, expected range: 2984.0517 3395.1705
resat
AURA/OMI OZONE, TOP PRESSURE LAYER 0-1 (HPA) : out of range
Severe: obs_number=10136.0000, expected range: 16669.2300 24562.7700
NOAA-19/SBUV OZONE, TOP PRESSURE LAYER 0-1 (HPA) : out of range
5 times in the last 10 days for at least one item
Slight: obs_number=1957.0000, expected range: 2011.1031 2238.4224
Radiosondes
LAND TEMP TEMPERATURE (K) 27594 PRESSURE LAYER 0-300 (HPA) : out of range
Severe: rms_fgdepar=6.4392, expected range: 0.0000 3.4152
HIGH RESO LAND TEMP Q (G/KG) 61052 PRESSURE LAYER 300-600 (HPA) : out of range
Severe: rms_fgdepar=2.0112, expected range: 0.0666 1.0572
HIGH RESO LAND TEMP Q (G/KG) (3 pressure layers affected) : out of range
3 times in the last 10 days for at least one item
Severe: obs_number=328.0000, expected range: 250.9856 271.1321
HIGH RESO LAND TEMP TEMPERATURE (K) (2 pressure layers affected) : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=461.0000, expected range: 312.0024 417.3310
amdar
WIGOS AMDAR TEMPERATURE (K) MZXYCOZA (3 pressure layers affected) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_pge=0.8822, expected range: -1.8259 0.7500
WIGOS AMDAR Q (G/KG) XWGY0OZA PRESSURE LAYER 900-1200 (HPA) : out of range
2 times in the last 10 days for at least one item
Severe: avg_pge=0.9964, expected range: -1.1543 0.7500
prof
EUROPEAN WIND PROFILER VECTOR DIFF (M/S) 10832 PRESSURE LAYER 300-600 : out of range
Severe: rms_fgdepar=22.9995, expected range: 0.0000 13.3016
Severe: avg_pge=0.8267, expected range: -0.5893 0.7500
pilot
LAND PILOT WIND VECTOR DIFF (M/S) 96607 PRESSURE LAYER 600-900 (HPA) : out of range
Severe: rms_fgdepar=17.4175, expected range: 0.0000 9.0363
Severe: avg_pge=0.8607, expected range: -0.3365 0.6456
synop
AUTOMATIC LAND SYNOP SURFACE PRESSURE (PA) 89879 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: rms_fgdepar=775.3678, expected range: 0.0000 335.7418
Severely_persistent: avg_pge=0.9459, expected range: -1.2721 0.7500
MANUAL LAND SYNOP RH2M (%) 76040 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_pge=0.9889, expected range: -1.3286 0.7500
MANUAL LAND SYNOP SURFACE PRESSURE (PA) : out of range
7 times in the last 10 days for at least one item
Severely_persistent: obs_number=9.0000, expected range: 166.9679 227.2674
BUFR LAND SYNOP RH2M (%) 81788 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_pge=0.9881, expected range: -0.5458 0.7500
BUFR LAND SYNOP SURFACE PRESSURE (PA) 78896 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_pge=0.8912, expected range: -0.7554 0.7500
MANUAL LAND SYNOP RH2M (%) 61024 : out of range
Severe: rms_fgdepar=23.4020, expected range: 0.0000 11.8404
MANUAL LAND SYNOP RH2M (%) 42174 : out of range
3 times in the last 10 days for at least one item
Severe: avg_pge=0.9853, expected range: -1.6539 0.7500
MANUAL LAND SYNOP RH2M (%) 42447 : out of range
Severe: rms_fgdepar=44.0843, expected range: 0.0000 35.3826
Severe: avg_pge=0.9992, expected range: -0.0158 0.0243
MANUAL LAND SYNOP RH2M (%) 42177 : out of range
1 times in the last 10 days for at least one item
Severe: avg_pge=0.8547, expected range: -0.9668 0.7500
MANUAL LAND SYNOP RH2M (%) 35108 : out of range
3 times in the last 10 days for at least one item
Severe: avg_pge=0.9606, expected range: -1.5736 0.7500
MANUAL LAND SYNOP RH2M (%) 38618 : out of range
Severe: avg_pge=0.9725, expected range: -1.5591 0.7500
MANUAL LAND SYNOP SURFACE PRESSURE (PA) 42420 : out of range
4 times in the last 10 days for at least one item
Severe: avg_pge=0.8542, expected range: 0.3156 0.7500
MANUAL LAND SYNOP SURFACE PRESSURE (PA) 86221 : out of range
1 times in the last 10 days for at least one item
Severe: avg_pge=0.8553, expected range: -0.4647 0.7500
MANUAL LAND SYNOP SURFACE PRESSURE (PA) 43364 : out of range
Severe: rms_fgdepar=872.3581, expected range: 0.0000 158.6824
Severe: avg_pge=0.9342, expected range: -0.2593 0.2886
MANUAL LAND SYNOP SURFACE PRESSURE (PA) 42767 : out of range
Severe: avg_pge=0.8061, expected range: -0.5037 0.7500
BUFR LAND SYNOP RH2M (%) 72464 : out of range
Severe: rms_fgdepar=38.6047, expected range: 0.0000 21.5925
BUFR LAND SYNOP SURFACE PRESSURE (PA) 72570 : out of range
1 times in the last 10 days for at least one item
Severe: avg_pge=0.8163, expected range: -1.2771 0.7500
BUFR LAND SYNOP SURFACE PRESSURE (PA) 72672 : out of range
3 times in the last 10 days for at least one item
Severe: rms_fgdepar=300.9545, expected range: 0.0000 139.8163
Severe: avg_pge=0.8374, expected range: -0.8975 0.7500
BUFR LAND SYNOP SURFACE PRESSURE (PA) 48409 : out of range
Severe: rms_fgdepar=314.9124, expected range: 0.0000 162.3572
BUFR LAND SYNOP SURFACE PRESSURE (PA) : out of range
4 times in the last 10 days for at least one item
Considerable: obs_number=335.0000, expected range: 249.3715 310.0035
ship
SHIP SURFACE PRESSURE (PA) VRDJ3 : out of range
4 times in the last 10 days for at least one item
Severe: avg_pge=0.8715, expected range: -0.8726 0.7500
SHIP SURFACE PRESSURE (PA) WSM5364 : out of range
Severe: rms_fgdepar=1049.8668, expected range: 0.0000 695.8674
Severe: avg_pge=0.9331, expected range: -1.3305 0.7500
SHIP SURFACE PRESSURE (PA) VRKS4 : out of range
Severe: avg_pge=0.8623, expected range: -0.6992 0.7500
SHIP SURFACE PRESSURE (PA) ZCDD6 : out of range
3 times in the last 10 days for at least one item
Severe: avg_pge=0.8820, expected range: -1.2957 0.7500
SHIP SURFACE PRESSURE (PA) VRGE7 : out of range
1 times in the last 10 days for at least one item
Severe: avg_pge=0.8003, expected range: -0.7632 0.7500
metar
AUTOMATIC METAR SURFACE PRESSURE (PA) PFNO : out of range
Severe: rms_fgdepar=524.4338, expected range: 0.0000 136.5645
snow
MANUAL LAND SYNOP SNOW (CM) 71924 : out of range
3 times in the last 10 days for at least one item
Severe: rms_fgdepar=12.1595, expected range: 0.0000 4.2948
t2m
AUTOMATIC LAND SYNOP 2M TEMPERATURE (K) 89577 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_est_pge=0.8189, expected range: 0.6993 0.9180
MANUAL LAND SYNOP 2M TEMPERATURE (K) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: obs_number=125.0000, expected range: 97.6240 101.2408
LAND TEMP 2M TEMPERATURE (K) 89009 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_est_pge=0.8290, expected range: 0.0380 1.2617
BUFR LAND SYNOP 2M TEMPERATURE (K) 89577 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_est_pge=0.8248, expected range: 0.7038 0.9180
MANUAL LAND SYNOP 2M TEMPERATURE (K) 23383 : out of range
Severe: rms_fgdepar=7.1382, expected range: 0.0000 3.9631
METAR 2M TEMPERATURE (K) KGPT : out of range
Severe: rms_fgdepar=10.1713, expected range: 0.4797 4.4987
LAND TEMP 2M TEMPERATURE (K) 04417 : out of range
2 times in the last 10 days for at least one item
Severe: avg_est_pge=0.8527, expected range: -0.3937 1.4222
rh2m
AUTOMATIC LAND SYNOP RH2M (%) 68006 : out of range
Severe: rms_fgdepar=25.5258, expected range: 0.0000 13.4015