| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Earth radius (rE) | Aerospace | The average radius of the Earth, a convenient unit of distance in describing phenomena and orbits in the Earth's neighborhood in space. 1 RE = 6371 km = 3960 miles, approximately. (references) | |
| Effective Earth radius | Aerospace | See effective radius of the earth. (references) | |
| Effective Earth radius | Business | The radius of a hypothetical Earth for which the distance to the radio horizon, assuming rectilinear propagation, is the same as that for the actual Earth with an assumed uniform vertical gradient of atmospheric refractive index. Note: For the standard atmosphere, the effective Earth radius is 4/3 that of the actual Earth radius. (references) | |
| True earth radius | Geography | The radius of an ideal spherical Earth without atmosphere for which propagation paths are along straight lines, the height and ground distances being the same as for the actual Earth in an atmosphere with a constant vertical gradient of refractivity. Source: European Union. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
Topics by Level of Interest: EARTH RADIUS | ||||
| Topics sorted by level of Interest | Level (1=low, 600=high) | Topics sorted Alphabetically | Level (1=low, 600=high) | |
| Effective Earth radius | 2 | Effective Earth radius | 2 | |
Source: the editor, created by/for EVE to gauge likely levels of human interest in linguistically triggered topics (compiled across various sources, such as Wikipedia and specialty expression glosses). | ||||
