Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would
be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate
that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views.
It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if
you would like to post something on RF Cafe's
page, please do.
Below are all of the forum threads, including all
the responses to the original posts.
Post subject: RADAR MINIMUN ALTITUDE DETECTION AT 25 MILES
Posted: Sat Feb 06, 2010 4:01 pm
Joined: Sat Feb 06, 2010 3:28 pm
I need to know if an X Band radar antenna is sitting flat 10 feet off of the ground with vertical search beams that scan from -2 degrees up to 45 degrees what is the minimun altitude that it can detect a moving target the size of a Cessna 152 aircraft at 25 miles taking the curvature of the earth and other propagation factors into consideration and no line of sight obstructions. The radar has a max detection range of 45 miles. So please assume that it has plenty of power, antenna gain and receiver sensitivity.
Thank You in advance
Post subject: Re: RADAR MINIMUN ALTITUDE DETECTION AT 25 MILES
Posted: Sun Feb 14, 2010 8:31 pm
Joined: Wed Feb 22, 2006 3:51 pm
You might have predicted the answer, "it depends"...
The minimum altitude will usually be determined by the ground reflection clutter, in the presence of sufficient transmitter power, antenna gain, and receiver noise figure, which you said were sufficient.
The ground clutter is determined by the antenna pattern and the anti-clutter filter behavior.
There's a really wide range of possibilities there!