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Flat Earth Theory / Re: Amateur radio shows the earth is round
« on: October 28, 2018, 05:13:22 AM »
There are equations out there that show the effects of the environment and show the effects of the curvature of the earth on a microwave signal. Other effects are the topology of the earth. Inland, the earth is not anywhere near flat. There are lots of hills, valleys, trees and tall buildings that will obstruct a microwave signal. If you are putting up an expensive microwave link you always start off with a path survey. It involves looking at the path with a topographic map and you won't even see the curvature of the earth on it. The curvature is usually built into the software that used to calculate the estimate of the total path loss that you should experience. Of course things change during the seasons of the year, you can have storms or foggy days, ect. The amount of signal strength margin you have can then be used to get an estimate of the percentage of time you may actually loose the path due to all the variables. Curvature of the earth is only one of many variables to be considered. At least it is known and doesn't change. Many of the other variables can change a lot. There are university papers available in the internet that outline all the theoretical equations that apply to microwave signals. Some equipment manufactures also have a certain amount of that kind of information in their manuals that are sometimes available on line for anyone to look at. I know that I'm poking the bear again, but take a look at Exalt Microwave. They have installed a microwave link with a total length of 146 miles. Certainly, that is possible and an actual system is said to exist. There are flat earth videos claiming that this link proves their theory. Exalt is a known company and has equipment installed all over the US. The link I mentioned is between Cyprus and Lebanon. Both countries have some small mountains on the coast and the distance between the countries is mostly the Mediterranean Sea. I haven't found anything that tells me just where the link antennas are located, but that distance still could be doable even with a curved earth if the antennas were high enough. The videos said that the antennas were on 50 foot towers, but didn't exactly say just where the towers were located. I did take a quick look at Cyprus and found a 600+ meter hill on Cyprus. There is a communications company in that location and a 50 foot tower at that distance above sea level could work out fine, if there was another site on the Lebanon side that was about the same. Anyone that's interested can easily see all the same stuff that I have. You could even call Exalt and tell them about the Flat Earth theory, and get them to install a system for you between Chicago and Des Moines. It would probably be a money maker if you could get it to work.