In obtaining the radar horizon equations, it is common practice to assume a value for the Earth's radius that is 4/3 times the actual radius. This is done to account for the effect of the atmosphere on radar propagation. For a true line of sight, such as used for optical search and ...
As long ago as the 1970s, TI, among other companies, introduced a handheld calculator powered by a small solar panel, and some of those first credit card-sized systems are still around, helping people figure tips and total their grocery bills. In the throw-away world of consumer electronics...
Measure the distance between the ground and your line of sight. If you know your height, you can use this measurement as an estimate. Otherwise, use a tape measure to measure the distance between your eyes and the surface you’re standing on.[1] Quick estimation from sea level: If you...
As long ago as the 1970s, TI, among other companies, introduced a handheld calculator powered by a small solar panel, and some of those first credit card-sized systems are still around, helping people figure tips and total their grocery bills. In the throw-away world of consumer electronics...