Keyword Position Type Description ------- -------- ---- ----------- INP 1 UNIV Name of the input time series PERIOD 2 REAL Initial period to begin folding PINC 3 REAL Period increment NPER 4 INTEGER Number of periods to try NPBIN 5 INTEGER Number of phase bins PER 6 UNIV Name of output periodogram FOLD 7 UNIV Name of output folded file