Abstract
An existing 4.6 meter Cassegrain antenna at the Ottawa Research Lab was modified to augment a passive RF observation space domain awareness capability currently under development. A commercial-off-the-shelf S-band flat panel antenna is now used as a feed to provide joint passive one-way Doppler and interferometry measurements of satellites in Earth orbit. These measurements can be used to improve orbit determination accuracy and contribute to space domain awareness in a very economical fashion. Near-field measurements of the feed, numerical simulations of the feed in the presence of the main and sub- reflectors, details on the RF front-end, and experimental Doppler and interferometry results are presented.
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