25 May 2012
OK,, this is an old photo... when we toured PR, we went to the Arecibo Telescope. This was very impressive, a radio telescope built here because they found a depression in the Karst topography that would almost perfectly fit a 1000 foot diameter telescope dish! It is the biggest Radio telescope in the world and most sensitive. It also has an antenna that studies the Ionosphere... something that we are also interested in, since our HF radio uses the Ionosphere to reflect radio waves for us... allowing us to talk to other boaters around the world and receive weather data... we also use the HF Radio to send and receive emails when we are at sea.