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SAK — Swiss Army Knife

A toolbox of utilities for tide and ocean time series data: convert formats, merge, clean up, and reshape your files.

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Quick report on any text file: structure, delimiter, columns — plus quality stats if it's already .tsd.

Replace text in any raw file — literal or regex.

Pull values out of text that isn't cleanly tabular — embedded in free-form lines, fixed-width, or at a variable position.

The entry point: any file → .tsd, or .tsd → CARIS, HYPACK, plain text.

Reorder, fill timestep gaps, and resolve duplicate timestamps.

Cut a series down to a specific date range.

Apply a multiplier and offset to a variable — unit conversion, datum shifts.

Join files from the same station/variable into one continuous series.

Split a large file into N parts by date.

Interp & Resample

Change the resolution of a single file (e.g. 1s → 1min): interpolate, snap to nearest, or aggregate.

Combine variables from different files — interpolate, snap to nearest, resample, or sequence raw.