The Galactic Center is the closest example of a spiral
galactic nucleus, and is uniquely important both in
its own right, and as a template for the study of other
galactic nuclei. Because it is bright, it is possible
for ISO to complete a basic spectral study of very
weak FIR lines from minor species which may hold the
key to an understanding of the nature of the central
engines of galaxies.  Because it has a relatively
large angular extent, the GC is suitable even for the
large beam of ISO's LWS.  The ISO Guaranteed Time
Program covers only selected intervals in the FIR with
the Fabry Perot, skipping important spectral regions.
In this proposal we plan full ISO/LWS Fabry Perot
coverage of remaining selected, important spectral intervals
pointed on SgrA itself.  For some aspects of our
analysis it will important to incorporate the results
with the ISO/LWS guananteed time observations on the GC.
Therefore, in order to maximize the science to take
advantage of complementary information in the GT
bands, it is our intention to make the results of our
program available to the community as soon as possible
(no 1 year waiting period).