He writes that he was without a patron when in Rayy, and lived in poverty. al-Khujandi was an astronomer who was working with a very large instrument he had built on the mountain above Rayy to observe meridian transits of the sun near the solstices .
Siya magsusulat na siya ay walang isang tagataguyod kapag sa Rayy, at nanirahan sa kahirapan. al-Khujandi ay isang astronomer na noon ay nagtatrabaho sa isang malaki instrumento niya binuo sa bundok sa itaas Rayy obserbahan katanghaliang tapat transits ng Linggo malapit sa solstices.