The temporal phase stability of the medium was measured at a site used for the collection of synthetic-aperature sonar data. These measurements were conducted over a two-year time span, and were made at several different heights-above-bottom. Results obtained show that for small heights-above-bottom, the standard deviation of the phase is as small as 0.04 radians over a 20-min measurement interval. At larger heights-above-bottom, the standard deviation of the phase is much larger, getting as large as 0.31 radians over a 2-min interval for one measurement.
No takes yet. Share an insight, caveat, or question.
Christoff et al. (1982) studied this question.