| Term: | Range |
| Definition: | (1) The distance to a target such as a glacier surface from an Active sensor such as a sonic ranger or a radar. (2) The cross-track coordinate in the coordinate frame of an airborne or orbiting radar. See azimuth. (3) Of an Active sensor, to measure the distance to, that is, to 'range to', a target. Senses 2 and 3 have evolved from sense 1, which originated in gunnery but has become common in several branches of remote sensing. |