Nice try, but it’s not aperture synthesis

Some of the world’s largest radio telescopes are not actually as physically large as they claim to be, but instead are groups of telescopes spread over a wide area whose outputs merge to create a virtual telescope equal to the maximum distance. mass components. Can this be done cheaply with an array of satellite dishes? It is possible, but how? [saveitforparts] found when matching a set of Tailgater portable dishes rather than simply connecting the outputs of the LNBs.

The video below the break still makes for an interesting investigation, and the Tailgater units are particularly neat. That prompted us to do a little reading about true aperture synthesis, which requires some clever math and phase measurements for each antenna. Given four slightly fancier LNBs with phase-locked local oscillators and a dedicated software radio (SDR) for each, he might be on to something.

If you are interested in the video board, you can read our review about it. And the Tailgater might be a little small, but you can still make a useful radio telescope out of satellite TV parts.

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