Can TDRSS support future AFSCN operations

The Air Force Satellite Control Network (AFSCN) is a global configuration of common user and dedicated control nodes and space/ground link resources whose mission is to support space vehicle telemetry, tracking, and control (TT&C) requirements and to receive, process and disseminate mission data for a variety of operational DoD space systems. The primary space/ground link resources include 9 remote tracking stations (RTS) supporting 16 antennas that operate at S-band using the Space-Ground Link System (SGLS). A study was performed last year [1] to evaluate the capability of the current NASA Tracking and Data Relay Satellite System (TDRSS) to provide space-ground connectivity for AFSCN-supported space vehicles. The results of this study were extended this year in support of a DoD/NASA TT&C Integrated Product Team (IPT) whose purpose was to explore options available to significantly reduce cost and improve mission effectiveness through increased DoD use of TDRSS. The purpose of this paper is to report the results of these studies, which address the various technical, regulatory, and economical considerations associated with TDRSS providing support to the AFSCN.