Attachment Supplement

This document pretains to SES-MFS-20060713-01156 for Modification w/ Foreign Satellite (earth station) on a Satellite Earth Station filing.

IBFS_SESMFS2006071301156_510641

&4 LEVENTHAL SENTER & LERMAN PLLC July 17, 2006 Steen D. BarucH Em (202) 4166782 SeaRUCHaSLLAW.COM precr rax gon 294026 BY HAND DELIVERY Marlene H. Dortch Secretary Federal Communications Commission 445 Twelfth Street, S.W., Room TW—B204 Washington, D.C. 20554 Re: Application of HNS Licensee Sub, LLC, File No. SES—MFS—20060713—01156 Dear Ms. Dortch: HNS Licensee Sub, LLC ("Hughes"), by its attorneys and pursuant to Section 1.65 of the Commission‘s Rules, 47 C.F.R. § 1.65, hereby provides additional information relevant to its above—referenced application to modify its earth station authorization under Call Sign EO00166. In its application, Hughes requested, inter alia, to add the Mexican Satmex—6 satellite as a point of communication forits authorized and proposed antennas. It represented that a coordination agreement had been reached in principle with the operator of Satmex—6, butthat the joint Hughes/Satmex—6 coordination letter memorializing the agreement had not yet been finalized. See Hughes Modification Application, Exhibit A at 8, n.5. The letter in question has now been fully executed, and a copy is enclosed. Please associate this letter with Attachment 3 to Exhibit A to Hughes® July 13 modification of license application. Any questions concerning this matter should be directed to me. Respectfelly submitted, hS D. Baruch ou I for HNS Licensee Sub, LLC Enclosure ce (w/encl.): Scott Kotler, Chief, System Analysis Branch (by e—mail) Steven Doiron, Hughes (by e—mail) K STAEET, NW. SU

July 13, 2006 SATMEX Federal Communications Commission — International Bureau 445 12th Street, S.W. Washington, D.C. 20554 Subject: Engineering Certification of Satelites Mexicanos S.A. de C.V. (SATMEX) To whom it may concemn: This letter certifies that Satelites Mexicanos S.A. de C.V. (SATMEX) is aware that Hughes Network Systems, LLC (HNS), is seeking FCC authorization to access Satmex— 5 at 116.8 degrees W.L. and Satmex—6 at 113.0 degrees W.L., using Ku—band transmit/receive antennas that are not strictly compliant with the FCC 2—degree spacing requirements for off—axis sidelobe gain. The Satmex—5 satellite currently provides coverage of the Continental United States (CONUS) from this orbital location, at 116.8 degrees W.L. Satmex 6 was launched on 27 May, 2006 and will operate under authorization from the Government of Mexico. The application for the inclusion of Satmex—6 to the U.S. Permitted List has been submitted to the FCC and is presently on public notice.‘ SATMEX understands that HNS will be deploying 74 cm equivalent transmit/receive remote terminals for its two—way VSAT services working with the hubs located at Germantown, MD, and North Las Vegas, NV, under the FCC call signs E000166 and E940460 respectively. These terminals can be deployed with either Prodelin HANT— 91TR antenna or with Raven 74 cm antenna (model number HNS—1035610), where both have a performance that is equivalent to a 74 cm circular aperture antenna. SATMEX understands that HNS will also operate 98 cm transmit/receive circular aperture remote terminals in the U.S. These antennas are to be installed with a nominal pointing accuracy of less than or equal to +/—0.6 degrees. (See Attachment 1 HNS Commitment and Attachment 2 Terminal Performance) All the above are not strictly compliant with the FCC part 25 rules: the antennas will meet the antenna sidelobe performance 29—25L0g(0) starting at an angle slightly larger than that specified in the FCC part 25 rules, but still smaller than 1.9 degrees. SATMEX has made a commitment that the carrier parameters it will assign will not exceed the technical parameters establish in coordination agreement with Telesat Canada. SATMEX has coordinated a maximum input power density at the antenna waveguide flange of —17.0 dBW/4 kHz in Ku band with adjacent satellite operators. This represents a level which is 3 dB more restrictive than the maximum flange power thatis routinely authorized by the FCC in §25.134(a)(1) of its regulations. The undersigned further certifies that the maximum downlink Satellite EIRP density of +13.0 dBW/4KHz or 37.0 dBW/MHz, operational level of the Ku—band VSAT network operated by HNS, is within the levels coordinated with Telesat Canada this operation will be consistent with the coordination Agreement. * Satelites Mexicanos, S.A. de C.V., Public Notice June 23, 2006, File Number SAT—PPL —20060329—00030, Call Sign $2695. w ({ Page 1 of 7 Rodolfo Gaona nim. 86 40. piso Lomas de Sotel 11200, México, D. F. Tel. +52 (55) 2629 5800,wiwsatmex.com

: SATMEX SATMEX will include the subject non—conforming earth station operations in all future satellite network coordinations, as is required in Sections 25.220(d)(1)(iii) of the Commission‘s rules. Si Regulatory Branch, Director Acceptance by HNS: HNS certifies that the information provided to SATMEX and reflected in this affidavit letter is true and accurate to the best of its knowledge. HNS agrees to abide by the Page 2 of 7 Rodolfo Gaona ném. 86 ao. plso Lomas de Sotelo 11200, Mérica, D. F. Tel. +52 (53) 2629 $800, satmex.com

ATTACHMENT 1 Prodelin, model number HANT—91TR, 98 by 56 cm elfiptical—aperture antenna These antennas are to be installed with a nominal pointing accuracy of less than or equal to +/—0.6 degrees. Raven, model number HNS—1035610, 84 by 69 cm elfliptical—aperture antenna These antennas are to be installed with a nominal pointing accuracy of less than or equal to +/—0.5 degrees. Prodelin, model number 9008668, 98cm circular antenna These antennas are to be installed with a nominal pointing accuracy of less than or equal to +/— 0.5 degrees. &" ¢ SATMEX

~ATTACHMENT 2 Prodelin, model number HANT—91TR, by 56 m elliptical— intenna One terminal utilizes a 98 by 56 cm elliptical—aperture antenna having the sametransmit gain as a 74 cm equivalent circular—aperture (E74 cm) Prodelin antenna. These antennas generally exhibit their non—compliance in the region from 1.25 to 1.4 degrees off axis from maximum gain in the transmit band, due to the width of their main gain lobe. They are compliant with the side lobe pattern requirements specified in Section 25.209 of the Commission‘s Rules in the plane of the geostationary satellite orbit as it appears at the particular earth station location for off—axis angles starting at 1.4 degrees in the transmit band. ‘Raven, model number HNS—1035610, 84 by 69 cm elliptical—aperture antenna One terminalutilizes a 84 by 69 om elliptical—aperture antenna having the same transmit gain as a 74 cm equivalent circular—aperture (E74 cm) antenna. These antennas generally exhibit their non—compliance in the region from 1.25 to 1.6 degrees off axis from maximum gain in the transmit band, due to the width of their main gain lobe. They are compliant with the side lobe pattern requirements specified in Section 25.209 of the Commission‘s Rules in the plane of the geostationary satellite orbit as it appears at the particular earth station location for off—axis angles starting at 1.6 degrees in the transmit band. Prodelin, model number 9008 98cm circular antenn. The other terminal utilizes a 98 cm circular—aperture Prodelin antenna. These antennas generally exhibit their non—compliance in the region from 1.25 to 1.6 degrees off axis from maximum gain in the transmit band, due to the width of their main gain lobe. They &7 are compliant with the side lobe pattern requirements specified in Section 25.209 of the Commission‘s Rules in the plane of the geostationary satellite orbit as it appears at the particular earth station location for off—axis angles starting at 1.6 degrees in the transmit band. SATMEX


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Document Created: 2006-07-17 17:19:19
Document Modified: 2006-07-17 17:19:19
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