Mapping Toolbox

majaxis

Calculate semimajor axis from semiminor axis and eccentricity

Syntax

• semimajor = majaxis(semiminor,eccentricity)
  semimajor = majaxis([semiminor,eccentricity])
  

Description

The semimajor axis, the first element of the standard geoid vector in the Mapping Toolbox, can be determined given both the semiminor axis and the eccentricity.

semimajor = majaxis(semiminor,eccentricity) returns the semimajor axis length corresponding to the input semiminor axis and eccentricity.

semimajor = majaxis([semiminor eccentricity]) allows the inputs to be packed into a single, two-column input of the form [semiminor eccentricity].

Examples

Using the default values for the Earth:

• semimajor = majaxis(6356.7523,0.0818192)
  semimajor =
     6.3781e+03
  

This is the default semimajor axis.

See Also

almanac	Planetary data
axes2ecc minaxis	Related conversion functions

ltln2val

makemapped