3325 x 4155 px | 28,2 x 35,2 cm | 11,1 x 13,9 inches | 300dpi
Data acquisizione:
6 luglio 2018
Ubicazione:
Chilbolton Observatory, Drove Road, Chilbolton, Stockbridge, UK
Altre informazioni:
he Chilbolton Observatory is a facility for atmospheric and radio research located on the edge of the village of Chilbolton near Stockbridge in Hampshire, England. The facilities are run by the STFC Radio Communications Research Unit of the Rutherford Appleton Laboratory and form part of the Science and Technology Construction of Chilbolton Observatory started in 1963. It was built partially on the site of RAF Chilbolton, which was decommissioned in 1946. Several sites around the south-east of England were considered for the construction. The site at Chilbolton, on the edge of Salisbury Plain, was chosen in part because of excellent visibility of the horizon and its relative remoteness from major roads whose cars could cause interference. The facility was opened in April 1967. Within several months of being commissioned the azimuth bearing of the antenna suffered a catastrophic failure. GEC were contracted to repair the bearing and devised a system to replace the failed part while leaving the 400 tonne dish ostensibly in-place.The S-band VIPER radar (formerly known as the 'Scottish' radar) was originally built to study the reliability of microwave radio links during heavy sleet and snow events in Scotland. Since 2006 it has been relocated to Chilbolton. The VIPER radar is a 3-GHz scanning Dopper weather radar, capable of making depolarisation measurements. It operates on a small 3-metre dish with a 3kW peak output power. Currently a new data acquisition system is being designed for the radar, along with other modifications to allow it to operate semi-continuously at vertical. Because the attenuation of the radar signal in rain at 3GHz is much lower than for either of the cloud radars, data from the VIPER radar should allow us to correct for that attenuation, and to make estimates of the ice water content in thick frontal cloud above precipitation; this is currently a weakness in our cloud observations and comparisons with model data.
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