Departure from authorized C/T (dB).
Highest C/KT and time measured.
Lowest C/KT and time measured.
Number of samples taken.
4. Often, during network operations, it may be necessary to reconfigure a real-time link or the whole network.
Some of the causes for reconfiguration are-
Rapid terminal relocation.
Enemy action.
Degradation of a link.
Changes in communications requirements.
5. Reconfiguration by adding or deleting terminals is done by the GMF controller. This involves changes to
the SAMS data base and coordination with the tactical terminal by orderwire. Terminal relocation requires
immediate action by the controller to coordinate the movement. New system parameters and look angles must
be provided and the SAMS data base updated. Adding a new type Earth terminal and using a new satellite also
requires reconfiguration. The GMF controller has the authority to reconfigure the network until changes in
satellite power or new frequency assignments are required; then, the GMF manager must be informed of the
change required. The DSCS controller is responsible for the DSCS satellite communications network. Since
the GMF controller must interface with the DSCS controller when any action that takes place might impact on
network performance. Coordination is normally required-
Before GMFSC terminals come on the air.
When changes in GMFSC transmit power are required.
When serious link degradations occur that cannot be isolated by the GMF controller.
6. A more serious condition is when the DSCS controller informs the GMF controller that violations have
taken place in the GMFSC network. As mentioned previously, a major duty of the GMF controller is to
monitor the uplink and downlink characteristics of the GMFSC network for out of tolerance conditions. The
result of this monitoring is to help TACSAT communications terminal operators find stations that are at fault
and correct the problems. In severe cases, such as satellite failure or interference, the DSCS controller must
help pinpoint and rectify the problem. The GMF controller, closely coordinating with the DSCS controller,
directs and implements network antijamming plans.
SS0031
5-18
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