Attachment Amends application

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

IBFS_SATMOD2003111800333_372566

        Via Hand Delivery
                                                                           m3 2 7 2004
        Ms. Marlene H. Dortch
        Secretary
        Federal Communications Commission
        445 12th Street, S.W.
        Washington, D.C. 20554

                Re:     Mobile Satellite Ventures Subsidiary LLC
                        File No. SAT-MOD-20031 118-00333 (ATC application)
                        File No. SAT-AMD-20031118-00332 (ATC application)
                        File No. SES-MOD-20031118-01879 (ATC application)

        Dear Ms. Dortch:

               Mobile Satellite Ventures Subsidiary LLC (“MSV”) hereby amends the above-referenced
        application to reflect its willingness to operate with even more stringent out-of-band emission
        (“OOBE”) limits into the 1605-1610 MHz band than those proposed in its pending application.
        On November 18,2004, MSV filed applications for authority to operate an Ancillary Terrestrial
        Component (“ATC”) in connection with the existing and planned L-band Mobile Satellite
        Service (“MSS”) systems of MSV and Mobile Satellite Ventures (Canada) Inc. (“MSV
        Canada”). In these applications, MSV certified that its mobile terminals would satisfy certain
        OOBE limits into the 1605-1610 MHz band. See MSV ATC Application at 26. In fact, MSV’s
        ATC mobile terminals will meet OOBE limits in the 1605-1610 MHz band that are 36 dB more
        stringent than the OOBE limits listed in MSV’s application and 56-61 dB more stringent than the
        OOBE limits required by the FCC’s rules. 47 C.F.R. 5 25.253(g)(3).

                Please direct any questions regarding this matter to the undersigned.

                                                     Very truly yours,




        cc:    William Bell
               Lisa Cacciatore
               &chard Engelman
               Howard Griboff
               Paul Locke
               Kathyrn Medley
                Robert Nelson
                Ronald Repasi


-
Mobile Satellite Ventures LP                                         10802 Parkridge Boulevard, Reston, Virginia, 201 91 -5416


                      Exhibit

,
    Correction to Page 26 of MSV ATC Application


                     I




       In the 1605-1610 MHz band MSV’s ATC MTs will pot exceed a wideband EIRP

emissions limit that is determined by linearly interpolating from -90 dBW/MHz (at 1605 MHz)

to -@€+ (-661 dBW/MHz (at 1610 MHz). The end-point limits of the interpolation range will

decrease, by 5 dB, to -95 dBW/MHz (at 1605 MHz) and -+)
                                                      [-711 dBW/MHz (at 1610 MHz),

for all new ATC MTs MSV places in operation five years after MSV commences service. In the

1605-1610 MHz band, MSV’s ATC MTs will not exceed an EIRP that is determined by linear

interpolation from -100 dBW at 1605 MHz to -+W+ [-761 dBW at 1610 MHz for narrowband

emissions. These limits will tighten to -105 dBW at 1605 MHz and -$45f [-811 dBW at 1610

MHz for all new ATC MTs MSV places in operation five years after MSV commences service.

       The wideband EIRP level measurement will use a root mean square (“RMS7)
                                                                             detector

function with a minimum resolution bandwidth of 1 MHz and the video bandwidth will be not

less than the resolution bandwidth. The narrowband EIRP level measurement will use an RMS

detector function with a resolution bandwidth of no less than 1 kHz. The measurements will be

made over a 20 millisecond averaging period when the MT is transmitting data.




                                              26


MSV RESTON, ‘JFI                ID:703-390-2770          ’           FEE 2 7 ’ 0 4      1 2 : 3 3 No.002 P . 0 2




                                             CERTIFICATION

           I I, Dr. Peter D. Karabinis, Vice President & Chief Technical Officer of Mobile Satellite
       Ventures Subsidiary LLC (“MSV”), certify under penalty of perjury that:

             I am the technically qualified person with overall responsibility for preparation of the
       informationcontained in the foregoing. I am familiar with the requirements of the
       Commission’srules, and the information contained therein is true and correct.

                                                        &tea         on February 27,2004




                                                L‘’
                                                      /Vice      President & Chief Technical OfEcer



Document Created: 2004-03-05 15:59:57
Document Modified: 2004-03-05 15:59:57

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