In 1967 Jocelyn Bell discovered pulsars using the Cambridge University radio telescope - a two hectare field of posts and wires.
The pulsar was found to be in the constellation Vulpecula. How did she locate the pulsar? In other words, how do you aim a two hectare radio telescope consisting of posts and wires?
EDIT. I'll try to make my question clearer. I'm not a physicist and know zilch about radio telescopes. However, I've driven past the Mullard Radio Astronomy Observatory near Cambridge several times and seen their radio telescopes - a bunch of mini Jodrell Bank-type dishes. Now even I can imagine how you can aim one of these dishes towards a particular point in the sky. You crank the handle and point the dish to your target star or whatever, like you'd set up a TV satellite dish. What I cannot understand is how Jocelyn Bell was able to use a field of posts and wires to accurately locate a pulsar in Vulpecula. I've read that "The [radio telescope] output appeared on four 3-track pen recorders, and between them they produced 96 feet of chart paper every day." How did she know what portion of the sky these chart results referred to? I'm not asking for a technical explanation, just a plain English description of how she could home in on a particular point in the sky. Don't worry about making it too simple.