A performance assessment of the Green Bank Radio Telescope

This paper briefly summarizes the results of a computational study performed to evaluate the electrical performance of the Green Bank Telescope reflector antenna. All computed patterns were obtained with the program PRAC (Parabolic Reflector Analysis Code), developed by the authors, and with the commercial code GRASP7. The patterns and performance values, not published anywhere else as far as the authors know, indicate that low cross polarization (XPOL) performance can be achieved with a dual offset configuration, provided that a low XPOL feed is employed