The Rotational Spectrum of H$^{15}$NO$_{3}$

The millimeter and submillimeter rotational spectrum of the isotopic species of nitric acid, H$^{15}$NO$_{3}$, is currently being analyzed. Many transitions in the ground and first four lowest vibrational states, \textit{$\upsilon $}$_{9}$, \textit{$\upsilon $}$_{7}$, \textit{$\upsilon $}$_{6}$, and \textit{$\upsilon $}$_{8}$, have been assigned and fit using a Watson-type Hamiltonian. We will describe the general characteristics of the nitric acid spectrum and compare the rotational and centrifugal distortion constants of each state with those of the normal species.