> What you can do with this is that you wave around two yagi antenna. You point one at a broadcast source and an other at something flying in the opposite direc

> What you can do with this is that you wave around two yagi antenna. You point one at a broadcast source and an other at something flying in the opposite direction from the broadcast source. If all the stars align and the system works you then get the range, and the dopler. This is one interpretation, but it's actually pretty reliable. > This is not a radar where the user gets a display full of tracks in front of them You actually do get a full radar plot. See the video at the bottom of https://www.rtl-sdr.com/krakensdr-field-reports-and-software-updates/ https://www.rtl-sdr.com/krakensdr-field-reports-and-software... for a complete tracking of a weather balloon.