28 lines
919 B
Markdown
28 lines
919 B
Markdown
# ACF 1D
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Compute the one-dimensional autocorrelation function of a line profile. Only positive lags are output on the x-axis. The measurement table reports the dominant period from the first positive peak.
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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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| acf | LINE | Autocorrelation function (positive lags only) |
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| measurement | RECORD_TABLE | Table with the dominant peak period |
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## Controls
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| Name | Type | Default | Description |
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|------|------|---------|-------------|
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| level | dropdown | mean | Pre-processing: subtract mean before correlation, or none |
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## Notes
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- Only one-sided (positive lag) ACF is returned.
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- Peak period detection finds only the first local maximum; multi-periodic signals report only the shortest detected period.
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