| Antenna Briefs #4 - Interstellar Communication and SETI (Revised) |
| Antenna Briefs #4 - Interstellar Communication and SETI (Revised) This episode looks at communicating across distances of several light-years (multiple parsecs), and at the big antennas and very large power levels needed. In this revised episode, we start with an errata (list of changes) to the previous Episode 4 video. We then proceed, as before, to the solution to the "homework" problem assigned in episode 3 and then apply the results to the Search for Extraterrestrial Intelligence (SETI). The goal is to illustrate the large power levels that must be assumed, the antenna's needed, and the narrow bandwidths that may be required, using the underlying theory developed in this series. For anyone interested in the original episode 4 (with the error in the calculation), here's the link. Sadly I can't find a way to fix it using the YouTube editor. https://youtu.be/fuOVn2YgWRA |