Mapping Toolbox

ecc2n

Convert from eccentricity to the n representation of the ellipsoid

Syntax

• n = ecc2n(eccentricity)
  

Description

Eccentricity and the parameter n are two methods of defining an ellipsoid. The definition of n is:

(semimajor axis - semiminor axis)/(semimajor axis + semiminor axis).

n = ecc2n(eccentricity) returns the equivalent n for the input eccentricities. If the input, eccentricity, is a two-column vector, only the second column is used. This allows the standard two-element geoid vectors to be used as rows of the input, since the second element of these vectors is the eccentricity. In all other cases, all columns of the input are used.

Example

• n = ecc2n(almanac('earth','geoid'))
  n =
     0.00167922039463
  

See Also

almanac	Planetary data
ecc2flat majaxis	Other ellipsoid functions
n2ecc	Convert from n to eccentricity

ecc2flat

elevation