Attachment DISH - Commission Re

DISH - Commission Re

REQUEST submitted by IB, FCC

Request for additional information

2012-09-13

This document pretains to SAT-AMD-20100610-00127 for Amended Filing on a Satellite Space Stations filing.

IBFS_SATAMD2010061000127_966254

                                              Federal Communications Commission
                                                        Washington, DC 20554


International Bureau




                                                               September 13, 2012

              Pantelis Michalopoulos
              Steptoe & Johnson LLP
              1330 Connecticut Ave., NW
              Washington, D.C. 20036

                                                 Re:     DISH Operating LLC, Call Sign S2740;: SAT—MOD—
                                                        20100329—00058 and SAT—AMD—20100610—00127.

              Dear Mr. Michalopoulos:

                       This letter requests additional information regarding the above—captioned applications
              filed by DISH Operating LLC to allow operation of EchoStar 7 at the 118.8° W.L. orbital
              location. Specifically, we seek supplemental information regarding orbital debris/end—of—life
              operation statements that DISH has provided.

                       Section 25.283(c) specifies that space stations must discharge all stored energy sources at
              the end—of—life of the space station by venting excess propellant, discharging batteries, relieving
              pressure vessels, and other appropriate measures. Section 25.114(d)(14)(11) requires applicants to
              demonstrate how stored energy will be removed at the spacecraft‘s end—of—life.‘ DISH states that
              at EchoStar 7‘s end—of—life "...all sources of stored energy, with the exception of the oxidizer
              tanks, will be removed or vented....Because of the design of the spacecraft bus ... the small
              amount c7)f oxidizer remaining in the oxidizer tanks of the spacecraft at end—of—mission cannot be
              vented."~

                       We request that DISH provide additional information regarding EchoStar 7‘s orbital
              debris mitigation plan. Specifically, we request that DISH identify each tank on the spacecraft
              that will not be vented or have its pressure relieved upon disposal of the spacecraft, and for each
              such tank, provide the following information:

                   e   the volume of the tank,
                   e   the   propellants and/or pressurants left in the tank, identified by their chemical names,
                   e   the   mass of each propellant or pressurant left in the tank,
                   e   the   expected maximum internal temperature of the tank in disposal orbit, and
                   e   the   expected maximuminternal pressure of the tank in the disposal orbit.



              47 C.F.R. § 25.114(d)(14)(ii) (requiring applicants to demonstrate "whether stored energy will be
              removed at the spacecraft‘s end of life, by depleting residual fuel and leaving all fuel line valves open,
              venting any pressurized system, leaving all batteries in a permanent discharge state, and removing any
              remaining source of stored energy, or through other equivalent procedures specifically disclosed in the
              application.")
              * DISH Operating LLC, IBFS File No. SAT—AMD—20100610—00127, Narrative at 3.


    We also request that DISH explain whether the oxidizer tanks are currently sealed or
unsealed. If the tanks are sealed, please indicate when they were sealed. If the tanks are not
sealed, please state when they will be sealed, and whether the analysis of disposal options
outlined for the EchoStar 4 satellite in IBFS File No. SAT—STA—20110627—00122 is also
applicable with respect to EchoStar 7.

       Please provide this information no later than September 28, 2012, with a courtesy copy to
Chip Fleming at Chip.Fleming@fee.gov and Alyssa Roberts at Alyssa.Roberts@fce.gov.




                                                  Sincerely,
                                                        o. [rmonnmmmmnnnces
                                                  Rg%ert G. Nelson
                                                  Chief, Satellite Division




ce:     Howard W. Waltzman
        Mayer Brown LLP
        1999 K Street, NW
        Washington, D.C. 20006


        David Wilson
        Spectrum Five LLC
        1776 K Street, NW
        Washington, D.C. 20006
                                                 Db



Document Created: 2012-09-13 15:41:01
Document Modified: 2012-09-13 15:41:01

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