wifi4milez
Big Russ, 1918 to 2008. Rest in Peace
join:2004-08-07
New York, NY
 ·Verizon FIOS
 ·Sprint Mobile Broa..
 ·RoadRunner Cable
 ·BroadVoice
| Are wireless transmissions affected by gravity?
I was wondering if point to point transmissions were affected by the earth's gravitational pull. More specifically, 802.11x. I have heard people describe using downtilt on long links, and I want to know if gravity is the culprit!
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I like dogs, guns, and cheeseburgers. Whats your malfunction? |
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John Galt
Forward, March
Premium
join:2004-09-30
Happy Camp
 ·CenturyLink
| As the signal travels from the antenna, it gets weaker, and cannot maintain its forward momentum. Therefore, its velocity decreases and it starts to fall out of the sky.
Use of devices called "skyhooks" are useful...you screw them into the clouds, and the signal "swings" between them like Tarzan on a vine.
So, the short answer to your question is "yes"...gravity affects your signal.
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A is A |
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wifi4milez
Big Russ, 1918 to 2008. Rest in Peace
join:2004-08-07
New York, NY
·Verizon FIOS
·Sprint Mobile Broa..
·RoadRunner Cable
·BroadVoice
| I am having trouble finding any information about what a skyhook is and how it works. My google searches seem to only pull up information about the 1970's band.
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I like dogs, guns, and cheeseburgers. Whats your malfunction? |
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wifi repair
join:2004-05-06
Wilkes Barre, PA | reply to wifi4milez
LMFAO.. I believe I may have some of those skyhooks laying around if you want them. |
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amerigowire
join:2004-07-27
Vacaville, CA | reply to wifi4milez
windage
On longer link, I actually tilt the dish up a few degrees to compensate for this. It's not a terribly scientific process, more like Kentucky windage. |
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wifi4milez
Big Russ, 1918 to 2008. Rest in Peace
join:2004-08-07
New York, NY
·Verizon FIOS
·Sprint Mobile Broa..
·RoadRunner Cable
·BroadVoice
| So what exactly is downtilt, and why would someone want it? BTW that was a funny one John Galt. Skyhooks, I should have known! 
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I like dogs, guns, and cheeseburgers. Whats your malfunction? |
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jdmarti1
Jack
join:2004-06-15
Oilton, OK | My skyhook sits in my toolbox next to my cable and fiber stretchers. Wonderful tools....
Jack |
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superdog
I Need A Drink
Premium,MVM
join:2001-07-13
Lebanon, PA
| reply to amerigowire
said by amerigowire  :It's not a terribly scientific process, more like Kentucky windage. OMFG!, LMAO!!!!:D:D:D:D:D
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»www.wavecrazy.net Join WISPA today! »www.wispa.org/ |
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bito
Premium
join:2001-10-08
Atlanta, GA
| Hehe, I love Fridays.
"Downtilt" is a method by which your antenna (usually an omni) blasts some on your signal down by a few degrees so that you don't overshoot everyone. If you think of the radiation pattern of an omni as a donut, then downtilt is good for making the donut angle downwards on each side so it hits the ground a lot closer to your antenna. You get the idea. I am too shot out to explain better
Oh, and I like to use my "skyhook" on my "relaxing weekend" |
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Book
Premium
join:2004-05-24
Shepherd, MI | reply to wifi4milez
Re: Are wireless transmissions affected by gravity
I picked up a bunch of those sky hooks cheap on Ebay but the helium nozzle was busted. |
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iccomputing
join:2004-12-09
Dayton, OH
| reply to wifi4milez
wow...John, that was awesome!!
I never though you to be a smart @ss!
hehehehe 
Hey, if you like the skyhooks...you should check out these cordless extension cords!!
we call em' POA (power over air)
all in fun man..highlight of my day! |
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cmaenginsb
Premium,MVM
join:2001-03-19
Palmdale, CA
| reply to wifi4milez
Re: Are wireless transmissions affected by gravity?
To clarify downtilt is used in point to multipoint links because typically the customers are beneath the transmission site requiring the antenna to be pointed down.
As to point to points anyone who is doing these will adjust both the down/uptilt and radial setting until the signal is at it's maximum. |
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grcore
New and Improved
join:2003-12-06
usa
| reply to wifi4milez
Re: Are wireless transmissions affected by gravity
In fact, radio waves are affected by gravity. But the mass and density of the earth is much too small to have any noticablee affect at all.
Even the sun which has several hundred thousand times the mass of the earth, it's gravity has only a minute effect.
There would have to be a singularity within relative proximity on order for any effect to be noticeable. And the nearest one is speculated to be about 1600 light years away.
g |
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John Galt
Forward, March
Premium
join:2004-09-30
Happy Camp | I recognize that squirrel...
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A is A |
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countrysky
join:2004-01-12
Cleburne, TX | reply to wifi4milez
Re: Are wireless transmissions affected by gravity?
On a similar note, have you guys heard of the BOG initiative, Broadband Over Gravity? I hear it's gonna wipe out all the WISP's sometime around Spring 2007.
heh heh
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bito
Premium
join:2001-10-08
Atlanta, GA
| reply to grcore
Re: Are wireless transmissions affected by gravity
said by grcore :There would have to be a singularity within relative proximity on order for any effect to be noticeable. Hmmm, methinks that if there were a singularity close by, it's effect on my WISP equipment is going to be the least of my concerns |
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