The ITU JTG 4-9-11 meeting addressed technical aspects of the decision of the 1997 World Radiocommunications Conference (WRC-97) to allow non-geostationary orbit (NGSO) satellite systems, such as SkyBridge, to share frequencies with geostationary (GSO) satellite systems and terrestrial systems in the Ku-band (10 - 18 GHz) and Ka-band (18 - 30 GHz). WRC-97 established an international regulatory regime for such sharing, which includes NGSO power limits designed to protect GSO and terrestrial systems. An international task group --JTG 4-9-11-- was established to study the values of these limits, and report its findings at WRC-2000.

On this occasion, SkyBridge conducted a demonstration of the impact of the WRC-97 provisional power limits on direct broadcast satellite (DBS) systems. Receiving live Astra and Hispasat programming signals via satellite with standard consumer equipment, SkyBridge demonstrated the absence of any perceptible impact on DBS viewers from NGSO operations under the WRC-97 power limits, as enshrined in the International Radio regulation.

Delegates to this task group from over 25 nations and international satellite organizations convened in Toulouse to evaluate the these limits. There was broad agreement that, with suitable ground rules, NGSO systems can share spectrum with GSO and terrestrial systems. Progress toward achieving operational standards was made on several fronts.

"We are pleased with this global endorsement of the SkyBridge philosophy for sharing," said Pascale Sourisse, President and Chief Executive Officer of SkyBridge LP. "The principles adopted by the JTG 4-9-11 are consistent with the SkyBridge system design, and will enable SkyBridge to proceed towards implementing its global broadband access system by 2001. The work of this group has significantly furthered the WRC-97's intent to offer adequate access of spectrum to new systems, and see true competition in the provision of broadband multimedia services via satellite."

At this meeting, consensus was reached on use of new of a new methodology for evaluating the power limits applied to NGSO systems. The delegates also agreed on principles for software to be used by the International Telecommunication Union to confirm appliance of a NGSO system with the power limits. Progress was made in defining the appropriate protection for GSO and terrestrial systems and on the means of assessing the true effect of multiple NGSO systems.

Alcatel is the General Partner of SkyBridge LP. The other partners of SkyBridge include the following group of leading industrial companies: Loral Space & Communications of the United States; Toshiba Corporation, Mitsubishi Electric Corporation and Sharp Corporation of Japan; SPAR Aerospace Limited of Canada; Aerospatiale and CNES of France, and SRIW, a Belgian investment entity.

Based on a constellation of 80 Low-Earth-Orbiting (LEO) satellites, SkyBridge will deliver global connectivity to business and residential users worldwide with performance comparable to that of future terrestrial broadband technologies.

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