Abstract
For the design of satellite links, detailed knowledge of the transmission characteristics is important. Development issues such as channel measurements, feasibility and performance studies, pre-operational demonstration and verification tests, etc., are necessary or desirable before launch. For this task, another satellite might and should eventually be used. However, if a suitable test satellite is not available and if a tower, mountain, or cliff is not feasible, a proper airborne platform is necessary to emulate the characteristics of the satellite under investigation as closely as possible. This situation is assumed in the following. In this paper, theoretical as well as practical arguments are derived and collected, respectively: (i) to guide the selection of a suitable platform; (ii) to predict its limitations; and (iii) to consider the time-variant behaviour of satellite orbiting. The capabilities of a helicopter platform and of an airplane platform are demonstrated, supported by data recently collected in several test campaigns. © 1997 by John Wiley & Sons, Ltd.
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