Previous: Output Description
The observation equations are given by the zero-degree polynomial model
(y = A x):
y contains the observed offsets in a certain direction.
denotes the unknown coefficients of the polynomial.
The least squares parameter solution is given by:
is the (diagonal) covariance matrix of the observations.
The coefficients are estimated by factorization of the matrix N.
The inverse of matrix N is also computed to check the solution (stability) and
to compute some statistics.
A check number is given
that gives a hint on the stability of the solution.