Operational Interface Procedures for the South Pole TDRSS Relay ...

d. Site Specialist (SS). The SS is the technical focal point for all WSC ground equipment
The SS controls and monitors all ongoing and upcoming operational activities and, in the
event of an interface anomaly or failure, directs local reconfiguration. The SS also is
responsible for coordinating fault isolation and directing playback activities.
e. Communications Services Controller (CSC). The CSC is cognizant of all user services
being supported by a given TDRS.
f. Ground Communication Equipment (GCE) Tech (GCE Tech). The GCE Tech is the onshift
focal point for all GCE-related functional support on the GCE floor. The GCE Tech
is the expert technician with respect to the recording and playback of user, voice,
command, video and telemetry data. The GCE Tech also maintains the WSC tape library
and performs circuit configuration and restoration.
2.6 STDN Support Elements
2.6.1 General
STDN support elements include NISN and the Flight Dynamics Facility (FDF).
2.6.2 NASA Integrated Services Network
2.6.2.1
NISN is the operational communications network for NASA. The NISN Network is a global
communications system consisting of satellite and terrestrial circuits with diversely routed voice,
Administrative Message System (AMS) high-speed-data, wide-band data, and video
communications channels. NISN’s operational telecommunications circuitry carries information
used in the operational conduct of NASA’s technical missions, programs, and projects. The
circuits interconnect such facilities as NASA’s foreign and domestic tracking and telemetry
acquisition sites, launch areas, Payload/Project Operations Control Centers (POCC), science data
capture facilities, and network control centers. Primary functions of NISN’s circuitry is to
provide voice communications and transport spacecraft telemetry, command/control and tracking
data. Tracking data is transmitted as Low-Speed Data (LSD) via Tracking Data System (TDS) or
as High Speed Data (HSD) on the Nascom 2000 link to GSFC. NISN provides communications
coverage 24 hours a day, 7 days a week. However, for the SPTR project, the NASA Science
Internet (NSI) and the NISN links provide coverage 5 days a week for 12 hours per day.
2.6.2.2
The primary point of contact for NISN is the Communications Manager (Com Mgr).
2.6.2.3 Staffing
a. Communications Manager. The GSFC Communications Manager (COMMGR) is the
technical representative for day-to-day operation and is responsible for implementing all
procedures necessary to resolve problems affecting the immediate operation of the NISN
network. The COMMGR insures that all scheduled SPTR communications support is
a2302s2 2-6 532-OIP-NCC/SPTR