  Large constellations of orbiting communication satellites will become an
important source of noise for present and future astronomical observatories.
Mitigation measures rely on high quality predictive models of the position and
expected brightness of these objects. Optical linear imaging polarimetry holds
promise as a quantitative tool to improve our understanding of the physics of
reflection of sunlight off satellite components and through which models of
expected brightness can be improved. We present the first simultaneous
short-timescale linear polarimetry and optical photometry observations of a
geostationary satellite, using the new MOPTOP imaging polarimeter on the 2m
Liverpool Telescope. Our target, telecommunication satellite Thor-6, shows
prominent short timescale glint-like features in the lightcurve, some as short
as seconds. Our polarimetric observations overlap with several of these
micro-glints, and have the cadence required to resolve them. We find that the
polarisation lightcurve is remarkably smooth, the short time scale glints are
not seen to produce strong polarimetric features in our observation. We show
how short timescale polarimetry can further constrain the properties of the
components responsible for these micro-glints.
