Do you have a dish form DirecTV or Dish on your roof?  Want to take it down?  Well, maybe you should leave it installed and install an Over The Air Antenna.  OTA, HD OTA. Digital

There are lots of videos on YouTube that talk about the mounting of OTA antennas on your dish.

ATSC  3.0 Next Gen TV.

A first step is to figure out where the towers are and the direction to point the antenna.