Radio stations looking to communicate in a resilient and reliable manner in a short to medium distance (0-300 miles) can shoot an HF radio signal straight up and have it bounce right back down to earth using the ionosphere, rather than an artificial satellite repeater. That technique is known as Near-Vertical Incidence Skywave (NVIS). It's described in more detail in the 2022 video below.

Since 2015, the Ohio Section of the ARRL has hosted an annual operating event known as NVIS Day. We encourage radio operators to participate in NVIS Day, and add a few objectives to their operation:

You might like the video below on NVIS for emergency and post-disaster communication, and review of some past NVIS Day activity.