A week in the life of AMI
One of my jobs as the outreach officer at the Cavendish is to take people out on tours at of the Mullard Radio Astronomy Observatory (MRAO). This is something i very much enjoy but alas quite often none of the telescopes appear to move. This is due to them normally tracking a source for quite some time. They will slowly move with the sky but unless they move to another source, which they do for calibration purposes, you don’t see this happen. Quite often the time spent at one of our telescopes is too short to see this movement. So to illustrate this I’ve made a couple of time-lapse movies to show the Arcminute Microkelvin Imager (AMI) large and small arrays actually moving over the course of a week.
The Large Array consists of the eight 13-m dishes:
The Small Array consists of ten 3.7-m dishes:
Oh and for those of you who are interested, these videos were made with a cron job automatically grabbing the webcam feed with wget every hour and then using ffmpeg to do the conversion into a movie:
x=1; for i in *jpg; do counter=$(printf %04d $x); mv "$i" img"$counter".jpg; x=$(($x+1)); done
ffmpeg -r 6 -b 3200 -i img%04d.jpg output.mp4