2019-05-29, 15:00: Dr. J. Young (Cambridge, UK)
2019-05-29, 15:00: Dr. John Young (Cambridge, UK)
Dr. John Young
Challenges for high-resolution imaging of geosynchronous satellites
Optical (visible/infrared) interferometry provides the only practicable way to image satellites in Geosynchronous Earth Orbit (GEO) with sub-meter resolution. Such a capability is of interest to both commercial and military organisations and purusing it could fund further development of astronomical interferometry and related technologies. As an example, the Magdalena Ridge Observatory Interferometer (MROI) is currently being funded by the US Air Force Research Laboratory to demonstrate the sensitivity needed to observe GEO targets. GEO targets pose several unique challenges, notably their large angular size and faintness compared with the astrophysical targets typically observed by interferometers such as VLTI and CHARA. Other unique aspects of GEO imaging, for example their relative proximity resulting in non-negligible wavefront curvature, have been cited as significant issues whereas in fact straightforward solutions are available. I will explain both the real and bogus challenges and describe how they can be overcome, supported by results from imaging simulations. My presentation will include a short introduction to optical interferometry and image reconstruction techniques for non-specialists.
Location: 31 Fitzwilliam Place