If the radar antenna is 50m above your friend's level he'll be well
below the main beam.

While radars do typically have very high peak power outputs they only
transmit for a very brief fraction of time then shut off while they
listen for the echoes coming back from the
ships/planes/trains/automobiles/some clod walking his dog/what have
you. This drops the effective power output to a low level. As the
only demonstrated effect of radio waves is thermal (that is to say
they'll heat you up). the end effect isn't much diferent than what
you'd get from somebody shining a flash light at you from some
distance away. If your friend is worried about cancer lots of people
have tried to prove radio waves can do this but it hasn't been
reproducibly shown yet. If there is a link I'd think the research
would have conclusivly proven it by now. Have a look here-

http://www.mcw.edu/gcrc/cop/cell-pho...Q/toc.html#23B

This is really aimed at cellphone installations but the same general
ideas apply.

H.




On Sat, 7 Jan 2006 15:47:01 +0000 (UTC), "Thierry"
wrote:

Hi,

I received this message from a colleague but I cannot answer him. I d
not know these systems.
Could you help me ?

My company has installed a Radar Tower for Port survaillence. The tower
is about 50 meter height on top of the of a 3 stories building roof and
my office building just below the tower on the same level, 20 meter away
from the tower. At the same time, the surrounding is my working area (
Jetty Terminal for ships loading and unloading activities ). I can say
that I'll be around that area 12 hours a day for another 20 years.

My question:

Is it safe to work in that area????

Thanks in advance
Thierry
http://www.astrosurf.org/lombry

OK Thanks Howard and the others.
I have well an article on my website about EMR and health but I hadn't
data about radar.

Still thanks
Thierry

I don't understand being "on the same level" AND being "20 feet below".

73, Steve, K,9.D;C'I

I've been working in RF and transmitters for many years and I can say that
there are absolutely no side eff eff eff effects.
*(:-)


"Thierry" wrote in message
oups.com...
OK Thanks Howard and the others.
I have well an article on my website about EMR and health but I hadn't
data about radar.

Still thanks
Thierry

In article ,
"Steve Nosko" wrote:

I don't understand being "on the same level" AND being "20 feet below".

73, Steve, K,9.D;C'I

Seems that you don't understand the Antenna Beamwidths in the Horozontal
and Vertical Planes, on Modern Marine Radar Systems.

Me

Steve Nosko wrote:

I don't understand being "on the same level" AND being "20 feet below".

Yes confusing, but I am sure there are intense lobes to look out for.