The low-resolution DRAO survey of H I emission from the Galactic plane

A survey of H I line emission in the Galactic plane from Galactic longitude l = 72 degrees .2 to 149 degrees .0, and latitude b = -5 degrees .4 to 7 degrees .2, has been made using the 26-m Telescope at the Dominion Radio Astrophysical Observatory. Spectra were observed at 0 degrees .2 intervals of longitude and latitude, providing a survey which is fully sampled in the spatial domain. A detailed study of the antenna characteristics of the telescope allowed the correction of the spectra for stray radiation. The spectral resolution is 1.32 km s(-1), and the LSR velocity range is -260 to 161 km s(-1). The final spectra have an estimated T-b scaling accuracy of 1% and an estimated rms noise in one channel (0.8245 km s(-1)) of 0.25 K. A region of suspected strong H I self-absorption at l similar to 92 degrees, b similar to 3 degrees, has been identified. Comparison with spectra from the Leiden/Dwingeloo Survey is used to estimate the overall accuracy of the stray radiation corrections. This comparison also shows that a small percentage (similar to1%) of the spectra in the latter survey suffer from calibration errors exceeding 10%. A table of positions of the more discordant spectra is given.