We describe multi-baseline observations of a geostationary satellite using the Navy Precision Optical Interferometer (NPOI) during the glint season of March 2015. We succeeded in detecting DirecTV-7S with an interferometer baseline length of 8.8 m on two nights, with a brief simultaneous detection at 9.8 m baseline length on the second night. These baseline lengths correspond to a resolution of 4 m at geostationary altitude. This is the first multiple-baseline interferometric detection of a satellite.


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    Very-Long-Baseline Interferometry Using Cheap Satellites

    Mahoney, M. J. / Jones, D. L. / Kuiper, T. B. H. et al. | NTRS | 1989


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    Schmitt, Henrique R. / Restaino, Sergio R. / Armstrong, J. Thomas et al. | SPIE | 2017