# Slant range

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Distance measure in radar and radio electronics

Sensor slant range

Sensor slant range (1)

In radio electronics, especially [radar](/source/Radar) terminology, **slant range** or **slant distance** is the distance along the [relative direction](/source/Relative_direction_(geometry)) between two points. If the two points are at the same [level](/source/Level_(coordinate)) (relative to a specific [datum](/source/Datum_(geodesy))), the slant distance equals the horizontal distance.

An example of slant range is the distance to an aircraft flying at high altitude with respect to that of the radar [antenna](/source/Antenna_(electronics)). The slant range (1) is the [hypotenuse](/source/Hypotenuse) of the triangle represented by the altitude of the aircraft and the distance between the radar antenna and the aircraft's [ground track](/source/Course_(navigation)) (point (3) on the earth directly below the aircraft). In the absence of altitude information, for example from a [height finder](/source/Height_finder), the aircraft location would be plotted further (2) from the antenna than its actual ground track.

## See also

- [Ranging](/source/Ranging)

- [Spherical range](/source/Spherical_range)

- [Line-of-sight propagation](/source/Line-of-sight_propagation)

## References

- This article incorporates [public domain material](/source/Copyright_status_of_works_by_the_federal_government_of_the_United_States) from [*Federal Standard 1037C*](https://web.archive.org/web/20220122224547/https://www.its.bldrdoc.gov/fs-1037/fs-1037c.htm). [General Services Administration](/source/General_Services_Administration). Archived from [the original](https://www.its.bldrdoc.gov/fs-1037/fs-1037c.htm) on 2022-01-22. (in support of [MIL-STD-188](/source/MIL-STD-188)).

- This article incorporates [public domain material](/source/Copyright_status_of_works_by_the_federal_government_of_the_United_States) from *[Dictionary of Military and Associated Terms](/source/Department_of_Defense_Dictionary_of_Military_and_Associated_Terms)*. [United States Department of Defense](/source/United_States_Department_of_Defense).

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