Provide an abstract of the science justification here between
\propabstract{ and }. Summarize what observations you wish to
obtain by what means, what the science goals of these observations are, and
why the proposed science is important. Write the abstract with a
generic astrophysicist, outside your own field of expertise, in mind. The
TAC is small and may not have any specialist in your field. Avoid unexplained
acronyms and keep jargon to a minimum. The typeset abstract should not run
longer than 18 lines. Note, that the abstract text cannot contain blank
lines (i.e., multiple paragraphs), or a LATEX error will result.