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CF - Construct Fourier

(12/27/93)

PURPOSE

To construct a Fourier file from amplitudes and phases of reflections.

SEE ALSO

CF 3 [construct Fourier - 3D]

USAGE

.OPERATION: CF

.OUTPUT FILE: FOU001
[Enter name of output file.]

.ENTER LARGEST H, LARGEST K: 7,9
[Enter largest indices in your data. This input determines the dimensions of the file. To be sure that the file has square dimensions, choose HMAX=KMAX. The "next" powers of two are calculated for the given indices. In the above example, the final dimensions would be 16,32 (16=PAD(2*7), 32=PAD(2*9)).]

.REPETITION FACTOR: 2
[Enter factor to expand the scale of the data with respect to the Fourier file. As a result of expansion, the inverse transform of the result will appear repeated with the period 2 in both directions. Only powers of two are allowed.]

.ENTER H,K INDICES, AMPLITUDE PHASE: 2,1,220.,180.
[Enter indices, amplitude, and phase (in degrees) of first reflection.]

.ENTER H,K INDICES, AMPLITUDE, PHASE:

[This sequence continues until 0,0,0,0 is entered.]

NOTES

  1. Implemented by: JF

SUBROUTINES

CREATF, CREAF3

CALLER

FOUR1

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