manshack_one
join:2006-08-11
Crockett, TX
| 15 Mile - NLOS - Suggestions?
I'm finding interest in a rural isp however the person who is financing it wants to see it work first. The base antenna I can probably get 100 ft in the air. I'll either go rooftop or treetop (if necessary) to get the height required on the other end. It's wooded (heavily in some spots. Will 900mhz equipment be required? What kind of equipment (and at what ballpark price) can this be done with? Thanks in advance! |
|
rawgerz
In Debt we trust
Premium
join:2004-10-03
Grove City, PA | 15 miles with NLOS at 100ft? Impossible comes to mind.. |
|
manshack_one
join:2006-08-11
Crockett, TX | Ok. Then how about 250? |
|
rawgerz
In Debt we trust
Premium
join:2004-10-03
Grove City, PA
 ·Verizon Online DSL
 ·Sprint Mobile Broa..
| Your saying, that 100Ft you cannot see the location?
If you can see 95% of the way 2.4 should work. 900 would be more suited at short range maybe 2 miles with more obstructions, like at the most 1/2 of woods, something like that.
--
"Hows your French toast?" "Smelly and ungrateful, but this AMERICAN toast is great!" |
|
manshack_one
join:2006-08-11
Crockett, TX
| well, at 15 miles, maybe with a telescope.  Seriously, I'm just asking because I don't know. I do know that the earth starts curving at something like six miles so you have to start raising it on both ends to beat that plus you've already got pine tress out the wazoo (highly technical wisp term i understand) that you've got to top also.
I guess I need to find some of that fancy 3d topo software to look at it on the pc first. |
|
rawgerz
In Debt we trust
Premium
join:2004-10-03
Grove City, PA
·Verizon Online DSL
·Sprint Mobile Broa..
| Well at that distance, your probably only going to be able to just do trial and error. Which would involve climbing a tower(s) and placing radios and antennas. As long as at 100Ft on one or both sides your not going through trees it's possible
--
"Hows your French toast?" "Smelly and ungrateful, but this AMERICAN toast is great!" |
|
manshack_one
join:2006-08-11
Crockett, TX | so, you're saying 2.4ghz might work, given that the trees can be overlooked?
Is there any drawback to placing the first node at 200 or 250 ft? |
|
wgawireless
join:2006-01-19
Carrollton, GA
| reply to manshack_one
The best suggestion I can give is to find the GPS coordinates of your two locations and put them into Radio Mobile. If you don't get high enough on both ends of the link, you can have Fresnel zone problems with the earth's curvature and the trees.
If you don't know what Radio Mobile is or how to use it, you could post the coordinates on here and someone will probably take the time to calculate it for you. |
|
slipstream1
Premium
join:2005-11-15
Jacksonville, TX | reply to manshack_one
IM me and I will give you as much information as I can. I know what you are dealing with. It looks the same here in Jacksonville. |
|
harmetp
join:2005-09-11
Cropsey, IL
| reply to manshack_one
A 15 mile piece of cat 5 wire works in most of these cases, but this is a wireless forum so we won't go their  .
Anyway, for most 2.4 and 5.8 gear you really need line of sight, 900 will penetrate more, but it seems (like cell phones in rural areas) that it will penetrate that last wall in a house, but not a forest of trees before the house.
If you have the $, get high enough to get line of sight, otherwise it will be a troublesome link. I have a couple of 10mile links that work great, but their is nothing in the way. When I was setting it up even some dead tree limbs killed the signal.
Hope this helps,
Pat |
|
slipstream1
Premium
join:2005-11-15
Jacksonville, TX
| reply to manshack_one
The only drawback is that the link will go out in the freezing or wind driven rain and you have to climb up there and fix it, but that is how my links are here in Jville. I have a program called Micropath. It will do the link analysis' that you will need. Shoot me a message and we can discuss it and see if we can make it work for you. |
|
manshack_one
join:2006-08-11
Crockett, TX
| Jacksonville huh? I'm in Crockett so you definitely know what I'm talking about. I'll pull up google earth and get strong "guess-timates" of the gps coordinates to let you guys play with. The rural population here is so sparse that it's hard to know which direction to point your antenna. I really need a map showing me where everybody lives. Any good products for something like that? |
|
slipstream1
Premium
join:2005-11-15
Jacksonville, TX | Besides beating the streets, I don't know. You may be well off the head in the direction of Alto and Wells. |
|
EZ Net La
join:2006-08-22
Marthaville, LA
| reply to manshack_one
If you are in the Texas Woods, to get a 15 mile shot point to point you'd be best off to start with 900 mhz canopy with a 12 db yagi. You will have to be above the tree tops, and that's at both ends. if you can get up around 300' on the base end the receiver end would only have to be around 50' or so to hit it. if you have your co-ordinates send them to me and I'll email you a comstudy shot so you can see what your terrain is. |
|
lutful
Premium
join:2005-06-16
Ottawa, ON
| reply to manshack_one
I will assume that you want to know if it is possible to provide NLOS coverage in a 15 mile radius from a single tower using 900Mhz equipment?
If you kindly locate the potential tower site, we can easily do Radio Mobile propagation analysis to see what kind of coverage you will get using different tower heights and different foliage assumptions. |
|
manshack_one
join:2006-08-11
Crockett, TX | Ok. Finally got google up and running. Here's my coord's.
N 31-18-39
W 95-26-33
Send me everything you've got! |
|
rawgerz
In Debt we trust
Premium
join:2004-10-03
Grove City, PA | for a terrian map you need to have Both site's listed. |
|
lutful
Premium
join:2005-06-16
Ottawa, ON | reply to manshack_one
A RM expert will post a nice coverage map for a 900Mhz AP with omni antenna located at 200ft height at your tower coordinates: 31 18'39'' N 95 26'33" W. |
|
manshack_one
join:2006-08-11
Crockett, TX | reply to rawgerz
good point
N 31-26-15
W 95-16-45 |
|
manshack_one
join:2006-08-11
Crockett, TX
|  reply to lutful
"A RM expert will post a nice coverage map for a 900Mhz AP with omni antenna located at 200ft height at your tower coordinates: 31 18'39'' N 95 26'33" W."
this is going to be good.... |
|
