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2009 Edition, December 1, 2009

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Radiolocation service sharing feasibility in the 154-156 MHz bands

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Studies on protection criteria and technical characteristics of the radiolocation systems operating in VHF frequency range resulted in preparation of Recommendation ITU-R M.1802 Characteristics and protection criteria for radars operating in the radiolocation service in the frequency band 30-300 MHz. This Recommendation contains the typical characteristics of radars operating in the VHF band.

Development of new applications in the radiolocation service closely related to significant growth of the number of space objects including artificial debris. These applications are planned for used of aerospace surveillance and tracking the launch and manoeuvring of spacecrafts. They are based on design of effective and economical radars that can be implemented in the VHF range.

WRC-12 Agenda item 1.14 was adopted at WRC-07 in order to address existing lack of spectrum available for radiolocation service in VHF band required for large-scale air and space surveillance operations.

VHF radio waves propagate well through the ionosphere, thus enabling various space object detection applications including remote space sensing and asteroid detection, as well as for defining the position of natural and artificial earth satellites, from terrestrial-based radiolocation systems.

ITU-R studies based on the current requirements were limited to radiolocation systems for space-object detection from terrestrial locations in a portion of the band 30-300 MHz up to 2 MHz bandwidth systems, however allocation with a wider frequency range may provide flexibility and facilitate sharing with existing services.

This report presents sharing studies between the radiolocation services systems and systems from other services in the band 154-156 MHz.