METHOD AND APPARATUS FOR SELECTIVELY OPERATING SATELLITES IN TUNDRA ORBITS TO REDUCE RECEIVER BUFFERING REQUIREMENTS FOR TIME DIVERSITY SIGNALS

摘要

A time diversity satellite system (100) provides geosynchronous satellites (102, 104, 106) in tundra orbits in three orbital planes. The satellites traverse a common figure-eight ground track (60) comprising northern (62) and southern loops (64). Power modes and early and late operating modes of the satellites are selectively switched to select the satellite currently traversing the northern loop to be the late satellite delivering a late signal, that is, a delayed early signal, to satellite receivers. A receiver can therefore employ a relatively small buffer for storing the early satellite signal for only the selected channel in a multi-channel TDM content signal (11) without experiencing latency problems when selecting a new channel.