An independent impact assessment was completed by GTech Surveys Limited and found the proposed mast would not cause interference for the reception of terrestrial digital or satellite television services. Analogue terrestrial television is no longer available in the area due to the Digital Television Switchover and therefore not included in the assessment.
Scope of investigation
A detailed desktop analysis and modelling exercise was completed, complemented by on site surveys. Field investigations were undertaken up to 10km from the development site, with the majority of the study concentrated on the immediate area around the mast and to the northeast where potential ‘signal shadowing’ could occur. Additional investigations were carried out in all areas where predicted (based on modelling) interference may occur.
Digital Terrestrial Television (Freeview)
Digital TV services are currently broadcast from the Dover transmitter located 26km southwest of the proposed development. At all test locations received signal strength and quality was found to be good. Modelling has indicated that Digital TV services are not at risk from signal interference generated by the proposed development due to: the proximity and location of current residential dwellings (outside the potential interference area); the height of existing residential dwellings; there are no residential properties to the northeast of the development where potential signal interference could occur.
Digital Satellite Television (Sky and Freesat)
Tall structures, including trees and buildings, can disrupt digital satellite television by causing line-of-sight obstructions, interfering with the signal received from geostationary satellites orbiting the equator. Using mathematical tangent function, and based on the height of the proposed development, it is anticipated that there will be no impact on residential digital satellite TV services, as no potential viewers are located in the area where signal shadowing might occur (653m from the base of the mast in a northwest direction).