The Earth’s radius in aircraft design, geography, and related fields refers to the average distance from the Earth’s center to its surface. The Earth is not a perfect sphere, so there are different ways to define its radius based on various criteria. The radius is measured in meters (m) or kilometers (km) in the International System of Units (SI). Here’s a definition and explanation:
Formula: The formula for calculating the mean radius of the Earth is as follows:
- Equatorial Radius is the distance from the Earth’s center to the equator.
- Polar Radius is the distance from the Earth’s center to the North or South Pole.