Supplement to 97 WL

SUPPLEMENT submitted by Hughes Network Systems, LLC

PFD Supplement

2015-05-29

This document pretains to SAT-MOD-20141210-00127 for Modification on a Satellite Space Stations filing.

IBFS_SATMOD2014121000127_1089356

May 29, 2015 VIA IBFS Marlene H. Dortch, Secretary Federal Communications Commission 445 Twelfth Street, SW Washington, DC 20554 Re: Supplement to Hughes Network Systems, LLC Modification Application – SAT- MOD-20141210-00127; Call Sign S2834 Dear Ms. Dortch: Hughes Network Systems, LLC (“Hughes”) hereby supplements its application – IBFS File No. SAT-MOD-20141210-00127 to clarify the power flux density (“PFD”) limits provided in the Schedule S and the Technical Information to Supplement Schedule S (“Technical Exhibit”) of the application. The PFD calculation in Section A.7 of the Technical Exhibit was done for an elevation of 90 degrees which corresponds to the lowest spreading loss between the space station and the surface of the earth. The lowest spreading loss means the highest possible PFD. This calculation resulted in a maximum PFD of -121.1 dBW/m2/MHz. However, item K of the S8 tab in the Schedule S shows the maximum PFD at a 25 degree elevation angle which results in a PFD of -121.8 dBW/m2/MHz. The decreased PFD is a function of having more spreading loss at a 25 degree elevation angle verses a 90 degree elevation angle. Please contact the undersigned with any questions. Sincerely, /s/ Jennifer A. Manner Jennifer A. Manner Vice President, Regulatory Affairs Hughes Network Systems, LLC 11717 Exploration Lane Germantown, MD 20876 (301)428-5893 cc: Kathyrn Medley (FCC) Stephen Duall (FCC)


Document Created: 2015-05-28 19:18:41
Document Modified: 2015-05-28 19:18:41
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