[ARC5] Re: What did they talk to ??

[J. Forster]

This table is essentially the geometric distance to the horizon:  From Google:

A NASA website (http://www-istp.gsfc.nasa.gov/stargaze/Shorizon.htm) describes how to calculate the distance to the
horizon. Their formula is in metric units, so I have converted it to imperial. It is D = 1.223 x sqrt(h) where h is the
height in feet. The result D is in miles.


1000'         D= 38.6  mi
10,000       D=122.3  mi
30,000       D= 211.8  mi

-John

Mike Morrow wrote:

> >Also the question was asked about the max range of the SCR-522 on VHF.
>
> Many of the WWII airborne VHF set operating instruction manuals contain a graph of line-of-sight miles vs. aircraft altitude, and that range was pretty much independent of the power output of the transmitters.  The graph that's in the manual for the AN/ARC-4 (AN 08-10-245), for example, gives the following:
>
> Altitude (ft)     VHF LOS Range (Statute Miles)
>
>   1000                  40
> 10000                 115
> 30000                 210
>
> Mike / KK5F