SECTION I. MULTICHANNEL SATELLITE SYSTEMS
LEARNING EVENT 1: SYSTEM DESCRIPTION
1. In addition to strategic terminals utilizing the Defense Satellite Communications System (DSCS), there are
also highly mobile, quick reaction tactical terminals supporting the services. These multichannel TACSAT
terminals utilize the Ground Mobile Force (GMF) component of the DSCS, and provide range extension and
connectivity between the tactical and strategic/base support communications networks.
satellite terminals. These terminals include the AN/TSC-100A and the AN/TSC-94A used by the Air Force,
and the AN/TSC-85B and AN/TSC-93B used by the Army and Marine Corps. These terminals are compatible
with Tri-Service Tactical Communications (TRI-TAC) and mobile subscriber equipment (MSE) area common-
user systems. These multichannel TACSAT terminals employ frequency division multiple access (FDMA); as
a result centralized frequency selection and uplink power control are required.
LEARNING EVENT 2: DEPLOYMENT
1. Theater through brigade level commanders, special contingencies, and selected divisions use tactical
multichannel satellite systems to support Army mission requirements. These systems were developed to
augment existing terrestrial multichannel communications systems.
2. Multichannel satellite systems are designed primarily for trunking. Consider the following factors when
selecting a link requirement for multichannel TACSAT terminals:
Criticality of the link to tactical command and control and the availability of other primary or supporting
Ground range over which the link must be operated in various scenarios.
Responsiveness and flexibility required with respect to siting and system reconfiguration.
Link survivability requirements.
3. Consider the following factors when deploying the AN/TSC-85B/93B: