ACTS propagation experiments

A multiphase program is in place to develop propagation experiments that will be conducted utilizing the beacons on the ACTS (Advanced Communications Technology Satellite). The beacons will transmit at 20 GHz and 27.5 GHz and will make it possible to acquire propagation data of great importance to the development of the next generation of communication satellites. The program began with experimentation with ESA's OLYMPUS satellite as a precursor to ACTS. Development of a prototype propagation terminal is nearing completion and construction of eight more terminals has begun. The process to select propagation experiments is underway. Successfully proposers will be supplied with NASA provided terminals to make in situ measurements. Experiments will also be chosen to carry out other types of investigations on topics such as the effects of the 20/30 GHz environment on mobile satellite applications. Mechanisms have been put in place to enlist the propagation research community in planning and coordinating the ACTS propagation experiments program.<>