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Name

orbfour - show geometric fourier coefficients of an orbit

Synopsis

orbfour in=orbit [parameter=value]

Description

orbfour calculates the fourier coefficients of an orbit by assuming you have sampled the orbit evenly. The first few dominant coefficients are then immediately computed by a straight sum.

The current implementation only shows the even cosine coefficients in the XY-plane.

Parameters

The following parameters are recognized in any order if the keyword is also given:
in=in-file
input file, in orbit(5NEMO) format [no default]
maxorder=n
Maximum order of the fourier expansion used. [default: 10]

See Also

orbdim(1NEMO) , orbit(5NEMO)

Bugs

The algorithm is based on a least squares fit, but assuming that sampling of the orbit has been done properly only diagonal terms in the matrix are used, and hence no matrix inversion is needed.

Author

Peter Teuben

Files


src/pjt/orbit    authors original sources

Update History


1-sep-90    V1.0: Created - only even cos terms    PJT


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