Evry, August 30, 1996 DGC/RJ/cpL96246 Subject: Launch Opportunity Reservation Agreement 95.5.921 between Arianespace and CD Radio ("The LORA") Dear Mr. Briskman, As discussed, we are pleased to revise certain terms of the LORA as follows: - The Launch...

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         EXHIBIT 10.14.5

         [ARIANESPACE LETTERHEAD]              CD RADIO INC.
                                               Xx. Xxxxxx Xxxxxxxx
         SENIOR VICE-PRESIDENT                 President, Systems Group
         MARKETING-CUSTOMER'S SERVICE          0000 00xx Xxxxxx, XX
         XXX XXXXXXXXXXXXX XXXXXXX             Xxxxxxxxxx, XX  00000
                                               XXX

                                               Xxxx, August 30, 1996
                                               DGC/RJ/cpL96246


                 Subject:  Launch Opportunity Reservation Agreement 95.5.921
                           between Arianespace and CD Radio ("The XXXX")


                Dear Xx. Xxxxxxxx,

                As discussed, we are pleased to revise certain terms of the XXXX
                as follows:

                      - The Launch Period reserved for CD Radio under Article 1
                      of the XXXX is changed to 1 May 1999 up to and including
                      30 October 1999.

                      - Notwithstanding the terms of Article 6 of the XXXX, the
                      reservation for the Launch Period referred to hereabove
                      shall be valid until 31st December 1996.

                      - The above amendments to the XXXX are made
                      notwithstanding the provisions of Article 5 of the XXXX
                      and all other terms thereof remain unchanged.

                Could you kindly confirm your approval of the above terms by
                returning an executed copy of this letter.

                Best regards,



                                         Xx. Xxxxx-Xxxxxx Xxxxxx

                  CD Radio Inc.




                  -------------------------------------
                  Xx. Xxxxxx X. Xxxxxxxx
                  President, Systems Group