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Sd-WASHINGTON, D.C. 20554`(#u DA 98842 ă  1yx dddhy  aE@#6\  P6Q|P#News media information 202/4180500 FaxOnDemand 202/4182830 Internet: http://www.fcc.gov ftp.fcc.gov  S-#&J\  P6Q &P#`"(#+ Released: May 4, 1998 ă  SK -  THE FCC'S ADVISORY COMMITTEE FOR THE 1999 WORLD RADIOCOMMUNICATION CONFERENCE PROPOSES PRELIMINARY 0AVIEWS ON WRC99 ISSUES  S - \ The WRC99 Advisory Committee is assisting the Commission in the development of proposals for the 1999 World Radiocommunication Conference (WRC99). On April 27, 1998, at its second meeting, the Advisory Committee proposed preliminary views on several issues that are to be addressed at WRC99. We request comments on these preliminary views. The proposed preliminary views were developed by four of the ten Informal Working Groups (IWGs) that report to the FCCs WRC99 Advisory Committee. IWG3, which handles issues on MobileSatellite Service (MSS) operations above 1 GHz, proposed preliminary views on four issues. IWG6, which addresses BroadcastingSatellite Service issues related to Appendices S30 and S30A also proposed preliminary views on four issues. IWG7, which deals with Fixed and FixedSatellite Service operations in the 3651 GHz band, and IWG8, which deals with other Fixed and FixedSatellite Service operations, each proposed one preliminary view. An overview and summary of the preliminary views that were proposed is provided below. The complete text of these preliminary views is available in the FCC's International Reference Center, 2000 M Street, N.W., Room 102, Washington, D.C. (telephone: 2024181492) or by accessing the FCC's WRC99 world wide web site at: http://fcc.gov/wrc99. To comment on these preliminary views, please submit an original and one copy of your comment to the Office of the Secretary, Federal Communications Commission, 1919 M Street, N.W. Washington, D.C. 20554. Comments should refer to specific preliminary views by document number. Parties preferring to email their comments should address their comments to: wrc99@fcc.gov. The deadline for comments on the proposed preliminary views is May 15, 1998. The comments provided will be of assistance to the FCC in its upcoming consultations with the U.S. Department of State, the National Telecommunications and Information Administration, and other government agencies for the purposes of developing approved U.S. preliminary views. Once approved by agreement among these agencies of the U.S. Government, preliminary views may be used by U.S. delegations to stimulate discussion and feedback and to attempt to achieve common proposals with other countries on these issues. The proposed preliminary views set forth herein may evolve in the course of interagency discussions and therefore do not constitute a final U.S. Government position on  SR&-any issue.  S'-  +,,,g/e@d;[!,L   '#   h Ԍ S-I. Preliminary Views of IWG3 (Informal Working Group on Mobile Satellite Service Above 1 GHz (Including NGSO MSS Feederlink Matters)/ RadionavigationSatellite Service (GPS)  S-Matters) A. Preliminary View  S- WRC99 Agenda Item 1.9: Resolution 220 (WRC97) ! Feasibility of Sharing Between Aeronautical Radionavigation and RadionavigationSatellite Systems Operating or Planned for Operation in the Band 15591610 MHz, and the MobileSatellite Service (SpacetoEarth), in a Portion of the Band  Si-15591567 MHz ((WAC/013(27.04.98)) XX` ` X ` ` \` `  (#  S-BACKGROUND: The U.S. proposed at WRC97 that there should be no changes in the allocations of the 15591610 MHz band in which the Global Positioning System (GPS) and other Aeronautical Radionavigation and RadionavigationSatellite Service (RNSS) systems operate or may operate in the future. The U.S. was concerned that any changes could result in significant interference to critical existing operations and may limit the ability to implement important, future GPSrelated services. GPS is a free service that is used by governments, consumers worldwide and by commercial airlines. Although no changes were adopted for this band at WRC97, there was strong support for allocating a portion of the band from 15591567 MHz for shared use with the MobileSatellite Service (MSS). This issue will be revisited at the WRC99. The U.S. is actively participating in sharing studies that are currently being done in ITU Radiocommunication (ITUR) Working Party 8D.  S-PRELIMINARY VIEW: The U.S. objective in this area is to ensure the integrity of Aeronautical Radionavigation and RNSS allocations in the band 15591610 Mhz, including GPS services. It is essential that RNSS safetyoflife services be protected from cofrequency interference. The studies undertaken to date by MSS proponents do not fully support an MSS allocation. New uses of GPS, both safetyoflife and otherwise, continue to be developed. Even if current uses could be protected, consideration should be given to future growth for GPS and RNSS systems. Issues of intraservice sharing and requirements should be addressed in advance of, or at least in conjunction with, any consideration of sharing between RNSS and MSS.  S- B. Preliminary View  S-WRC99 Agenda Item 1.10: To consider results of ITUR studies out in accordance with Resolution 216 and take appropriate action on this subject. Use of the bands 15251559 MHz and 1626.51660.5  S=-MHz by the MobileSatellite Service (WAC/014(27.04.98)) X` hp x (#%'0*,.8135@8: