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**Flat Earth Theory / Re: Why are all FE models discs?**

« **on:**January 01, 2023, 11:02:33 PM »

The WGS83 model gives all the details you need. Also the angles of dishes for broadcast satellites.

WGS83 takes data from small flat maps: https://wiki.tfes.org/World_Geodetic_System_1984

I haven't seen a study of triangulation of satellites to prove that we live on a globe. This is an assumption that such studies exist.Your position is flawed. Unless they did something like walking around with a digital measuring wheel and physically measured the earth with a tactile method, there were assumptions in measuring long distances.

Actually, they generally used chains back in the day.surveyor’s chain, also called Gunter’s chain, measuring device and arbitrary measurement unit still widely used for surveying in English-speaking countries. Invented by the English mathematician Edmund Gunter in the early 17th century, Gunter’s chain is exactly 22 yards (about 20 m) long and divided into 100 links. In the device, each link is a solid bar. Measurement of the public land systems of the United States and Canada is based on Gunter’s chain. An area of 10 square chains is equal to one acre.

This is equivalent to saying that surveyors had rulers. Maybe they did have rulers. But it doesn't prove that they measured long distances with them.If they used a digital measuring wheel then that would also mean making an assumption - that the wheel is calibrated correctly and accurate.

Your objection to “assumptions” is very selective. The Bishop Experiment makes assumptions, Rowbotham made assumptions. You have no issues with that. Only when an experiment or technique yields results you don’t like do you switch to the skeptical context and start objecting to “assumptions”.

You have previously agreed that GPS can accurately give your longitude and latitude. How can it do that without distances being known? Leaving aside how that would work in the middle of an ocean, as it demonstrably does, which rules out any land based solution

There are ways to test whether a digital measuring wheel is calibrated and accurate. This would be more of an experiment where the conditions can be controlled.

Other methods are not as controlled, and assume a lot about astronomy or the weather.

Latitude and Longitude are references ultimately based on astronomical phenomena. The Latitude is based on the angle of the North Star in the sky (for the NH) and Longitude is related to clocks and time zones. You might know your Lat/Lon coordinate point, but this would do nothing to show the distance between those points. This is how GPS, and formally the land-based LORAN, operate. The station knows its own coordinates and it is giving you your own coordinates based on triangulation.

Much of professional GPS and GIS work, by the way, assumes that the earth is flat.

From https://www.e-education.psu.edu/geog862/book/export/html/1644“ Welcome to Lesson Six of this GPS course. And this time, we'll be talking about two coordinate systems. And I have a little bit of discussion concerning heights. We've touched on that a little bit. Now these coordinate systems that we're going to discuss are plane coordinate systems based upon the fiction that the earth is flat, which, of course, immediately introduces distortion. However, much of GIS work—and GPS work as well—is done based upon this presumption. ”

The fact that the calculations to align a satellite dish actually work and are based on a round earth should satisfy you. The locations of geostationary satellites are well documentated. Dishes near the equator point up around 90⁰. Those north and south at a lower angle.