  Astronomers use the 1612 MHz OH spectral line emission as a unique window on
properties of evolved stars, galactic dynamics, and putative proto-planetary
disk systems around young stars. In recent years, experiments using this OH
line have become more difficult because radio telescopes are very sensitive to
transmissions from the GLONASS satellite system. The weak astronomical signals
are often undetectable in the presence of these unwanted human generated
signals. In this paper we demonstrate that GLONASS narrow band signals may be
removed using digital signal processing in a manner that is robust and
non-toxic to the weak astronomy signals, without using a reference antenna. We
present results using real astronomy data and outline the steps required to
implement useful systems on radio telescopes.
