A scanning-laser glint meter designed for field measurements of sea-surface slope statistics is described. A narrow laser beam is scanned in a line, and specular reflections (glints) are counted in bins according to their slope angle. From normalized glint histograms, moments to the fourth order are calculated, and slope probability density functions are approximated with a Gram–Charlier expansion. Field measurements with this instrument show good agreement with previous results when the stability (essentially air–sea temperature difference) is near neutral (zero). Under conditions of negative stability (warm ocean), both the mean-square slope and the probability density function kurtosis increase.
© 1997 Optical Society of America
Original Manuscript: May 1, 1996
Revised Manuscript: February 12, 1997
Published: June 20, 1997
Joseph A. Shaw and James H. Churnside, "Scanning-laser glint measurements of sea-surface slope statistics," Appl. Opt. 36, 4202-4213 (1997)