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\medskip
\centerline {\Large \bf PROJECT SUMMARY }
\bigskip
\centerline {\large \bf Operation \& Return of the Pre-HEAT Telescope on Dome A} 

\vspace{0.5cm}

We propose to continue operation of the Pre-HEAT telescope, the
submillimeter component of the Plateau Observatory (PLATO)
successfully deployed by an international collaboration to Dome
Argus in 2008 as part of the AstroPoles and PANDA IPY projects.  

Funded by an NSF SGER grant (ANT-0735854) in May 2007, 
Pre-HEAT is a 20~cm aperture
telescope with a one-axis drive system, coupled to an
ambient temperature Schottky diode heterodyne receiver operating at
450 microns wavelength (661 GHz).   The receiver output is directed to
an IF processor and FFT spectrometer for simultaneous measurement
of the submillimeter sky opacity and spectra of $^{13}$CO J=6-5, a
key spectral diagnostic of star formation. 


PLATO and Pre-HEAT took 204 consecutive 
days of data in the 2008 season, {\bf setting a new record} for high
powered, completely autonomous operation on the high plateau.  Even in
the first year of observations, Pre-HEAT has 
demonstrated that Dome~A is the finest site on the
planet for submillimeter and terahertz astronomy.



\section*{What is the intellectual merit of the proposed activity?}

\preheat\ and its successor, \HEAT\ (the High Elevation Antarctic
Terahertz Telescope)
forge entirely new capabilities for ground based infrared and submillimeter
astronomy which otherwise would be 
unachievable except via expensive airborne or space-based platforms.
\preheat\ represents  
a new generation of polar instrumentation that permits the excellent 
conditions available from remote sites like Dome A to be harnessed
without the costs  
and hazards associated with manned operations. In addition to
quantifying the transmission characteristics of the atmosphere over
Dome~A, \preheat\ is 
constructing the first large-scale submillimeter map of the Galactic
Plane in $^{13}$CO~J=6-5 which will help answer timely and 
fundamental questions about the evolution
of the interstellar medium and star formation.  It significantly
enhances the interpretation of previous millimeter wave surveys of
comparable quality, and will complement the exciting
terahertz-frequency surveys to be later performed by \HEAT.   

\section*{What are the broader impacts of the proposed activity?}

\preheat\ is a pioneering mission which is paving the way for
future far-infrared astronomical investigations from Dome~A.  
It is mapping the Southern Galactic Plane in the spectral light of
$^{13}$CO~J=6-5, 
a key measure of the warm, dense gas that participates in star
formation and stellar-interstellar feedback.  Definitive and
comprehensive science  
products from the survey and its many synergistic 
collaborations are being made available to the astronomical 
community via the Web.  These products will enhance the value of
numerous contemporary surveys.  Beneficiaries include the
GLIMPSE Legacy
program from the Spitzer Space Telescope, IRAS, the CfA/Columbia
CO~J=1-0 surveys of the Galactic Plane, the recent HI and CO
surveys of the Galactic Plane, and the 2MASS infrared sky survey.
\preheat\ will serve both as a scientific and technological pathfinder for 
future suborbital and space-based missions. 

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