Attachment Exhibit B - SES Ltr

This document pretains to SES-MFS-20150424-00270 for Modification w/ Foreign Satellite (earth station) on a Satellite Earth Station filing.

IBFS_SESMFS2015042400270_1085991

SES* Federal Communications Commission International Bureau 445 12th Street, S.W. Washington, D.C. 20554 April 23, 2015 Re: Engineering Certification Concerning AMC—3 To Whom It May Concemn: This letter certifies that SES is aware that Row 44, Inc. (‘Row 44") is planning to seek a modification (‘Modification Application") of its blanket authorization from the Federal Communications Commission (‘FCC") to operate technically identical Ku—band SES Americom, Inc. transmitreceive Earth Stations Aboard Aircraft ("ESAA‘) under Call Sign E080100. SES 1129 20" St. NW Suite 1000 understands that Row 44 will be filing the Modification Application pursuant to the current Washington, DC 20036 ESAA Rules, including Section 25.227, and it will propose changes in order to improve USA system capacity on domestic and internationalflights. Tel. +1 202 478 7100 Fax +1 202 354 4658 wwnw.ses.com SES notes that the proposed operations of the Row 44 ESAA terminals at the off— axis EIRP density levels and other operating parameters provided to SES and reflected in the Technical Annex (ExhibitA) to be submitted with Row 44‘s Modification Application comply with the Section 25.227(a) off—axis EIRP density maskin the planeof the geostationary satellite orbit (‘GSO®) and therefore no further coordination with GSO operators is required for these operations on AMC—3 at 67° W.L. SES also acknowledges that the proposed operation of the Row 44 terminals has the potential to create harmful interferenceto satelite networks adjacent to this satellite that may be unacceptable. If the FCC authorizes the modified operation that Row 44 proposes, SES will include the power density levels specified by Row 44 in all future satellite network coordination agreements it completes with other operators with respect to these satellites, and Row 44 will comply with all such coordination agreements reached by SE8. Sincerely, 4 Kimberly M. Baum Vice President, Spectrum Management and Development Americas SES Americom, Inc.


Document Created: 2015-04-23 13:28:26
Document Modified: 2015-04-23 13:28:26
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