[BC] Digital TV converter boxes

[Mark Humphrey]

On Thu, Apr 17, 2008 at 4:04 PM, Broadcast List USER
<Broadcast at fetrow.org> wrote:

>  You cannot use the four-thirds graph paper that we know we SHOULD
>  use, nor can you specify a fresnel zone clearance of greater than
>  zero, but line of sight isn't that bad.  You CAN clear buildings and
>  trees in the path in addition to terrain.  If you want to do the path
>  yourself, you can use Google Earth to find any obstructions you need
>  to go visit to review.

HeyWhatsThat.com will plot high resolution terrain profiles and shadow
maps based on the SRTM terrain database.

The following example shows visibility from 6 ft AGL on Mt. Soledad
near San Diego, but you can enter any desired coordinates and
elevation under "New Panorama".  Turn on "Visibility Cloak" to shade
all areas with optical line-of-sight, or enable "Show Profile" in the
menu at upper right for a radial elevation plot to any clicked point
on the map.

http://www.heywhatsthat.com/?view=S69UPRT2

The FAQ provide much more info.  I've found this to be an excellent
tool to help in selecting suitable FM transmitter and ham repeater
sites.


Mark