From the comments: "> But time is not on his side for using an existing radio telescope – they are all booked out. That is not true. There are several major f

From the comments: "> But time is not on his side for using an existing radio telescope – they are all booked out. That is not true. There are several major facilities for which observations in January 2017 can still be applied for, and there is not a single one for which you can even yet apply for observations in January 2018. If his idea was good enough, he could submit it to the normal telescope time allocation committees. It looks like he himself knows it's not. And there is not even any reason to wait for the comets to be in a particular part of the sky. Just observe them, or any other comet, at any time, to see if they emit at that frequency."