A large Mylar party balloon with helium? Yeah probably about that depending on where you are and the balloon type and size.
Yep. It seems like for this application you'd want a larger one, a few feet across, with a nice shiny metal foil coating for the radar to bounce off. So, not a $1 balloon.
alt Hacker News
Yep. It seems like for this application you'd want a larger one, a few feet across, with a nice shiny metal foil coating for the radar to bounce off. So, not a $1 balloon.