Attachment request

This document pretains to SAT-MOD-20031118-00333 for Modification on a Satellite Space Stations filing.

IBFS_SATMOD2003111800333_372568

Federal Communications Commission Washington, DC 20554 International Bureau January 21,2004 In Reply Refer To: File No. SAT-MOD-2003 1118-00333 SAT-AMD-2003 1118-00332 SES-MOD-2003 1118-01877 Bruce D. Jacobs David S. Konczal Tony Lin Shaw Pittman LLP 2300 N Street, N W Washington, D.C. 20037-1 128 Re: Mobile Satellite Ventures Subsidiary LLC Application for Minor Modification of Space Station License (AMSC-1) Application for Minor Amendment of Pending Application to Launch and Operate a Next-Generation Replacement MSS Satellite System Application for Minor Modification of Blanket Authorization to Operate Mobile Earth Terminals with MSAT- 1 Dear Messrs. Jacobs, Konczal, and Lin: We need the following additional information in order to assess MSV's request for waivers of provisions in Paragraphs (a)(2), (c), (d)(l), (d)(2), (d)(3), (d)(4), (d)(5), and (e) of Section 25.253 of the Commission's rules. 1. An analysis of the potential interference from MSV ATC base stations to airborne AMS(R)S terminals from both a statistical basis and a worst case basis using proposed antenna and EIRP values (see Table 2.2.3.1.A in Appendix C2 of the ATC Order)', with a description of all assumptions that are used. 2. An analysis of the coordination distance that should apply to SARSAT receive terminals operating in the 1525-1559 M H z band, including a description of all assumptions and propagation models that are used. Results should be presented in a manner similar to Table 3.3B in Appendix C2 of the ATC Order. 3. A link budget from the ATC handset to the satellite for the -4.0 dBW EIRP terminal and average power reduction due to vocoder $4 -rate operation for both the current satellite and the next generation satellite. I Flexibility for Delivery of Communications by Mobile Satellite Service Providers in the 2 GHz Band, the L-Band, and the 1.6L2.4 GHz Bands (Report and Order and Notice of Proposed Rulemaking), FCC 03-15, 18 FCC Rcd 1962 (2003), reconsidered, FCC 03-162, 18 FCC Rcd 13590 (2003)..

4. An analysis of the potential for AMS(R)S airborne terminal overload similar to that contained in Table 2.2.3.2.A in Appendix C2 of the ATC Order using the proposed values of EIRP and antenna gain changes. 5. In evaluating your waiver request for section 25.253(a)(2), we reviewed the relevant GSM specifications, and it appears that the specified burst duration is the same for both the full-rate and half-rate vocoders. It would appear based on this information that the additional 0.5 dB reduction in average power would not apply to this situation. Please clarify how you intend to achieve this reduction in average power, assuming you intend to maintain the same transmitter power and GSM burst duration. In addition, your analysis only addresses a TDMA system. Provide a similar analysis showing how the vocoder factor would be applied to a CDMA system. Please provide this information before COB February 4,2003, with hand-delivered or electronic courtesy copies to William Bell, William.Bell@fcc.gov, and Kathryn Medley, Kathryn.Medley@fcc.gov. If you fail to provide the information within this time period the captioned applications may be dismissed pursuant to Sections 25.112(c) and 25.152(b) of the Commission’s rules. Sincere1y, 7 Thomas S. Tycz Chief, Satellite Division International Bureau cc: Lon C. Levin Vice President Mobile Satellite Ventures Subsidiary LLC 10802 Parkridge Boulevard Reston, VA 20191


Document Created: 2004-05-12 15:58:43
Document Modified: 2004-05-12 15:58:43
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