THE 5 COLLEGE RADIO ASTRONOMY OBSERVATORY CO SURVEY OF THE OUTER GALAXY

Images from the FCRAO CO Survey of the Outer Galaxy and a description of the calibration and processing of the data are presented. The surve y is comprised of 1,696,800 (CO)-C-12 J = 1-0 spectra sampled every 50 '' between Galactic longitudes 102 degrees.49 and 141 degrees.54 and latitudes -3 degrees.03 and 5 degrees.41. The V-LSR ranges from -153 t o +40 km s(-1) sampled every 0.81 km s(-1) with a velocity resolution of 0.98 km s(-1). The survey provides the highest spatial dynamic rang e imaging of the molecular interstellar medium ever obtained. We descr ibe the observing procedure and characterize the random and systematic noise of the survey. The images reveal a wide diversity of spatial st ructure within the molecular interstellar medium. We identify several voids with angular extents of 2 degrees-5 degrees in diameter that may result from the cumulative interactions of ultraviolet radiation fiel ds and stellar winds from newborn massive stars with ambient interstel lar gas. It is demonstrated that a significant fraction of the integra ted intensity summed over the survey field originates from regions wit h low peak antenna temperature and low column density assuming a conve rsion between integrated CO emission and molecular hydrogen column den sity. Assuming kinematic distances to the observed emission, wie deriv e the radial profile of mass surface density and the variations of the z midplane and scale height of the molecular gas distribution with ga lactocentric radius.