name: RAS
full_form: Reliability, Availability and Survivability
context: Radio Astronomy Service (RAS) is a receive-only service that uses highly sensitive receivers to examine and study radio waves of cosmic origin. The band 606-614 MHz in China and the band 608 - 614 MHz in India are allocated to the radio astronomy service on a primary basis, as captured in clause 5. Referring to [3], FCC requires the geographical separation of 600 MHz base station from the RAS telescopes. This requirement is assumed as a baseline for the coexistence with RAS also for APT region until further detail is provided by these administrations. ITU-R made a compatibility and sharing studies between the radio astronomy service and IMT systems. The conclusion, based on measured IMT equipments indicated that the compatibility between RAS stations and IMT systems can be achieved using separation distances of order 60 - 80 kilometres between a RAS antenna and an IMT macro rural base stations, and of order 1 - 20 kilometres for a mobile terminals (assuming an unwanted emission level
description: Radio Astronomy Service (RAS) is a receive-only service that uses highly sensitive receivers to examine and study radio waves of cosmic origin.
explanation: The context explicitly states that RAS is a 'receive-only service', indicating it's a type of telecommunication offering, hence classified as a 'Service'. The mention of its allocation on a primary basis in specific frequency bands further solidifies this classification.
section_title: 6.3.3Coexistence between 600 MHz Radio Astronomy Service (RAS)
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