This paper sketches out the effective Hamiltonian and basis set adopted in
the spectroscopic calculation of asymmetric top free radicals, and details
the machine implementation of the spectral analysis of asymmetric top free
radicals, the design and usage of the program package. To demonstrate the a
pplication of this program, analyses have been performed on the far infrare
d laser magnetic resonance spectrum of (NO2)-N-14-O-16(I = 1) and the infra
red diode laser spectrum of the v(3) band of PO2(I = 1/2) using the program
.