Attachment Exhibit D

This document pretains to SES-MOD-20131125-01162 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2013112501162_1028635

                                           Exhibit D
                             Description of Proposed Modification

                LightSquared Subsidiary LLC, Debtor-in-Possession (“LightSquared”) currently
is licensed to operate a satellite carrier monitoring system (“SCMS”) under Call Sign E100051.
See IBFS File No. SES-MOD-20110906-01039, Call Sign E100051 (the “SCMS License”). By
this application, LightSquared seeks to modify the SCMS License by adding a remote earth
station at Cedar Hill, Texas (the “Cedar Hill Earth Station”).

               LightSquared’s SCMS currently consists of (i) a hub earth station located in
Ottawa, Ontario, and (ii) seven technically similar SCMS remote earth stations located in the
United States and Canada. These include a remote earth station located at Harlingen, Texas
under Site ID SCMS 1 (the “Harlingen Earth Station”). That facility is being decommissioned,
such that authority to operate the Harlingen Earth Station is no longer required and can be
removed from the SCMS License. See 47 C.F.R. § 25.161(c). The Cedar Hill Earth Station is
intended as a substitute for the Harlingen Earth Station and would ensure the continued
functionality of the SCMS.

                The Cedar Hill Earth Station would be technically similar to the remote earth
stations currently operating pursuant to the SCMS License. Moreover, the Cedar Hill Earth
Station would be used for the same purposes as the remote earth stations already authorized by
the Commission. In particular, and consistent with the existing SCMS License, the Cedar Hill
Earth Station would be used to monitor: (i) the signal levels of LightSquared’s various in-orbit
spacecraft, including SkyTerra 1, MSAT-1, and MSAT-2; and (ii) the performance of the link
from the Cedar Hill Earth Station to the hub station. The Cedar Hill Earth Station would not
provide any end-user functionality, and would not require any coordination with terrestrial
operators.

               In short, the Cedar Hill Earth Station would enable LightSquared (i) to continue to
operate its SCMS in the manner LightSquared deems most efficient, and (ii) to advance the
underlying objectives of its SCMS, which the Commission already has found to be in the public
interest. Accordingly, LightSquared respectfully requests that the Commission grant the
requested modification on an expedited basis.


          Diagram of Relocated Antenna

                                     0.84m
                                    Diameter

                   Roof                  0.60m



               Building

                  4.3 meters


                                     4.2 meters



Ground Level
  201.17m
   AMSL


                                   Technical Certification

               I, Richard Evans, Principal Engineer, LightSquared Subsidiary LLC, certify under
penalty of perjury that:

          1. I am the technically qualified person with overall responsibility for preparation of
             the technical information contained in this application.

          2. I am familiar with the requirements of Part 25 of the Commission’s rules, and the
             information contained in the application is true and correct to the best of my
             knowledge and belief.



                                                      /s/ Richard Evans
                                                   Richard Evans

Dated: November 22, 2013



Document Created: 2013-11-22 11:51:08
Document Modified: 2013-11-22 11:51:08

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