{"data":{"id":"us/14-cfr-appendix-c-to-part-1215","jurisdiction":"us","citation":"14 CFR Appendix C to Part 1215","heading":"Appendix C to Part 1215—Typical User Activity Timeline","body":"Time (approximate) Activity\nProject conceptualization (At least 3 years before launch; Ref. § 1215.108(a)) Request NASA Headquarters perform study to determine availability of TDRSS. If accepted as a user, begin contractual negotiation by submission of $25,000 non-refundable charge, and place into mission model.\n3 years before launch (Ref. § 1215.109(c). Submit general user requirements to permit preliminary planning. Begin payment for pre-mission activities (Ref. § 1215.115(b)(5)).\n18 months before launch (earlier if interfacing is expected). Provide detailed requirements for technical definition and development of operational documents and ICD's. (Ref. § 1215.109(e)). If appropriate, initiate action with the Federal Communications Commission for license to communicate with TDRSS at least 18 months prior to launch (Ref. § 1215.107(b)).\n3 weeks prior to a scheduled support period (SSP). 2 weeks prior to an SSP Submit scheduling request to GSFC covering a weekly period. Receive schedule from GSFC based on principles of priority (Ref. § 1215.109(b)(2)). Acknowledgement to GSFC required.\nUp to 12 hours prior to an SSP. Can cancel an SSP without charge (Ref. § 1215.113(a)(1)).\nUp to 45 minutes prior to an SPP. Can schedule an SSP if a time slot is available without impacting another user.\nBetween SSP minus 45 minutes and the SSP. Schedule requests will be charged at the disruptive update rate (Ref. § 1215.109(b)(5)).\nReal-Time. Emergency service requests will be responded to per the priority system (Ref. § 1215.109(b)(3)) and assessed the emergency service rate.","path":["Title 14—Aeronautics and Space","CHAPTER V—NATIONAL AERONAUTICS AND SPACE ADMINISTRATION","PART 1215—TRACKING AND DATA RELAY SATELLITE SYSTEM (TDRSS)"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-14.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:20Z","sha256":"e7b0c72c881b3a597f2901129514deea6d3f2807467fc81f7b71aaefa5473319","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-appendix-b-to-part-1215","next":"us/14-cfr-1216.100"},"notice":"GroundRules: Original legal text. Not legal advice."}