27 lines
744 B
Markdown
27 lines
744 B
Markdown
# FFT 1D
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Compute the FFT amplitude spectrum of a line profile and identify the dominant period. The output x-axis is period (not frequency), sorted from short to long.
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## Inputs
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| Name | Type | Required | Description |
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|------|------|----------|-------------|
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| profile | LINE | Yes | Input line profile |
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## Outputs
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| Name | Type | Description |
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|------|------|-------------|
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| frequency_plot | LINE | FFT amplitude spectrum vs. period |
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| max | RECORD_TABLE | Table with the peak period |
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## Controls
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None.
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## Limitations
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- The DC component is excluded from the output.
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- Spectrum is one-sided (real FFT); the x-axis shows period, not frequency.
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- No windowing is applied; spectral leakage may affect results on non-periodic inputs.
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