Digital Voice Modulation for a Future Generation of Ham Satellites

摘要

With the Phase 3D project nearing completion and launch, it is natural for Amsat to consider what type of projects to pursue in the coming years. Phase 3D should open up satellite operations to many more hams with its high power transmitters and high gain antennas, which are both made possible by its advanced 3 axis stabilized design. The chief disadvantage of Phase 3D is its approximately 400 kilogram mass, which will limit the possibility of Amsat ever being able to obtain a second launch for a possible Phase 3E follow on mission. Phase 3D was specifically designed to take advantage of a once-in-a-lifetime bargain basement launch opportunity that was presented to Amsat as a result of the Ariane 5 test and qualification program. Unless another 400 kilogram launch can be obtained at a price that Amsat groups around the world can afford to pay, Phase 3D will be the first and last of its kind. We therefore must consider how to serve the needs of the amateur satellite community with smaller and lighter satellites that we can launch at an affordable price.