Fellow Towertalkians: I would like to create a more accurate terrain profile in front of some of my antennas for say 500 to 1000 ft out, every 50 ft. Other than using a transit, are there some simple
Hi Tom! When I moved up here to the farm about 9 years ago, I wanted to know "the lay of the land" as well. I obtained a topographic map for about a buck from the following address: U.S. Geological S
If you can get your hands on a GPS that receives DGPS, the resulting signal should give you surveyor accurate elevations and locations. 73 Jonathan Kaplan KO6XS -- FAQ on WWW: http://www.contesting.c
Tom, get a USGS 7.5 minute topographical map (available at your local map or outdoor store). A great program to study the effects of terrain if you're not already using it is TA (K6STI). I input terr
HI Tom, Sure... Get the software Map Program called "Topo". A CD ROM disk covering your area has the USGS Maps within, and the capability to generate ground profiles for you, using your inputs as to
Hi Dave, Gee...word travels fast on email....Unfortunately, TOPO only draws the profile plots and you have to pick off the elevations and distances from the plots..and enter your own ascii file ..gre
How about the map store? Sounds like something a USGS 1:50000 map would show without much trouble. 73, Jim W9WU -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@conte
HI Brian, Yes, it is possible to get millimeter accuracy using sophisticated techniques in GPS, but it is not trivial, or cheap. Such accuracy requires Surveying grade GPS receievers, simultaneous me
Pat's point is correct regarding DGPS accuracy. To clarify, DGPS is accurate to something less than a meter in the horizontal and about 3x that accuracy in the vertical depending on the length of the
Hi Tom, I think this is what the cell phone people do all the time when planning a system installation. They are looking for dead spots for their 900 MHz or 2 GHz radios. I think they use a GPS recei
Borrow an altimeter for an airplane... Walk out to the base of your tower and set the altimeter to read a value you consider to be a zero altitude, such as 1000 ft, etc......Get a local street map an
Have done this many times. Works ok but must not try to use in vehicle if your initial spot (tower) was not in vehicle. (Vehicle air conditioner would affect reading). Tap or thump unit just prior to
I have been doing microwave path profiles for 30+ years. In the old days, we used barometric altimeters similar to aviation altimeters. Having flown planes at one time also, I would judge the baromet
Well, the high cost idea is correct. But the post processing software step is unnecessary. We locate shovel bucket positions to an RMS error sphere with a radius of tens of centimeters in real time.
I have one valid question after all of the bandwidth about the terrain mapping. When you take the 40X glass and get all of this broken down to presentable form, what are you going to gain in proforma
Who let Hank out ? To: <towertalk@contesting.com> -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contestin
mapping. form, half way when we You will calculations and propagation be in the As I suggested in a previous message, it's certainly possible to get more detailed than is reasonable, but I sure would
Personally, I dont care why he wants it- If you will check the dx record of the guy who started this question, it might be a good idea to find out why he is interested, and try to follow. Actually, t
Hi Bruce.. Altimeters are assumed to be accurate within 125 feet when set to the local barometer reading... If the altimeter (including the pitot, and static air systems when mounted in a plane) is c