Ptarmigan Triffid Military Phased Array Sept 2023

I have been given this incredible aerial/antenna this month – it a military phased array tuned to roughly the correct wavelength for hydrogen (1420MHz) with (I am told) a resolution on sky of about 5 degrees. It is designed for precise direction communication – but in my case I am hoping to use it to map the Milky Way at 1420MHz.