https://www.astronomy.me.uk/wp-content/uploads/2025/12/Peter-East-Hydrogen-Line-Radio-Telescope-1.pdf https://www.astronomy.me.uk/wp-content/uploads/2025/12/Peter-East-Hydrogen-Line-Radio-Telescope-2.pdf https://www.astronomy.me.uk/wp-content/uploads/2025/12/Peter-East-Hydrogen-Line-Radio-Telescope-3.pdf Post navigation Ideal focus position for Discovery Dish feed (hydrogen line) Design feedhorn to give an attenuation of 10 to 12 dB towards the rim of the dish.
