Find n-vector from R_E — R_EN2n_E • nvctr

Find n-vector from R_E

Usage

R_EN2n_E(R_EN)

Arguments

R_EN: Rotation matrix (direction cosine matrix) (no unit)

Value

n-vector decomposed in E (3x1 vector) (no unit)

References

Kenneth Gade A Nonsingular Horizontal Position Representation. The Journal of Navigation, Volume 63, Issue 03, pp 395-417, July 2010.

See also

n_E2R_EN, R_EL2n_E and n_E_and_wa2R_EL.

Examples

R_EN <- matrix(
   c(-1, 0,  0,
      0, 1,  0,
      0, 0, -1),
   nrow = 3, ncol = 3, byrow = TRUE)
R_EL2n_E(R_EN)
#> [1] 0 0 1