Comment by wbl
Thanks to the rotation of the earth and antenna fixed in one direction sees a bunch of the sky over an evening.
Thanks to the rotation of the earth and antenna fixed in one direction sees a bunch of the sky over an evening.
Yep "drift scanning" :)
A single dish/node can't really produce photograph-like imagery akin to an optical telescope, more often[1] you get something like in the setileague website hits [2].
[1] Where by "more often" I mean "once in a blue moon".
The CHIME telescope[1][2] is an example of that.
It's a bit more advanced though, the multiple antennas allows them to "steer" the antenna after the fact through signal processing.
[1]: https://chime-experiment.ca/en
[2]: https://en.wikipedia.org/wiki/Canadian_Hydrogen_Intensity_Ma...