R: The n-vector Approach to Geographical Position Calculations using an Ellipsoidal Model of Earth

# The n-vector Approach to Geographical Position Calculations using an Ellipsoidal Model of Earth

## Documentation for package ‘nvctr’ version 0.1.7

- DESCRIPTION file
- User guides, package vignettes and other documentation
- Package NEWS
- Package README

## Help Pages

nvctr-package | nvctr: non-singular geographical position calculations
along_track_distance | Compute the along-track distance from a great circle arc
altitude_azimuth_distance | Calculate the altitude, azimuth and distance of B from A
cross_track_distance | Compute the cross-track distance from a great circle arc
cross_track_intersection | Calculate cross-track intersection
deg | Convert angle in radians to degrees
lat_lon2n_E | Convert (geodetic) latitude and longitude to n-vector
nvctr | nvctr: non-singular geographical position calculations
n_E2lat_lon | Convert n-vector to latitude and longitude
n_E2R_EN | Find the rotation matrix R_EN from n-vector
n_EA_E_and_n_EB_E2p_AB_E | Find the delta position from two positions A and B
n_EA_E_and_p_AB_E2n_EB_E | Find position B from position A and delta
n_EB_E2p_EB_E | Convert n-vector to cartesian position vector in meters
n_E_and_wa2R_EL | Find 'R_EL' from n-vector and wander azimuth angle
p_EB_E2n_EB_E | Convert cartesian position vector in meters to n-vector
R2xyz | Find the three rotation angles about new axes in the xyz order from a rotation matrix
R2zyx | Find the three angles about new axes in the zyx order from a rotation matrix
rad | Convert angle in degrees to radians.
R_Ee | Select the axes of the coordinate frame E
R_EL2n_E | Find n-vector from the rotation matrix (direction cosine matrix) 'R_EL'
R_EN2n_E | Find n-vector from R_E
unit | Make input vector unit length, i.e. norm == 1
xyz2R | Create a rotation matrix from 3 angles about new axes in the xyz order.
zyx2R | Create a rotation matrix from 3 angles about new axes in the zyx order.