| タイトル | Laser probe for measuring 2-D wave slope spectra of ocean capillary waves |
| 著者（英） | Anderson, R. C.; Palm, C. S.; Reece, A. M. |
| 著者所属（英） | Florida Univ.|McDonald Observatory |
| 発行日 | 1977-04-01 |
| 言語 | eng |
| 内容記述 | A laser-optical instrument for use in determining the two-dimensional wave-slope spectrum of ocean capillary waves is described. The instrument measures up to a 35-deg tip angle of the surface normal by measuring the position of a refracted laser beam directed vertically upward through a water surface. A telescope, a continuous two-dimensional Schottky barrier photodiode, and a pair of analog dividers render the signals independent of water height and insensitive to laser-beam intensity fluctuations. Calibration is performed entirely in the laboratory before field use. Sample records and wave-slope spectra are shown for one-dimensional wave-tank tests and for two-dimensional ocean tests. These are presented along with comparison spectra for calm and choppy water conditions. A mechanical wave follower was used to adjust the instrument position in the presence of large ocean swell and tides. |
| NASA分類 | INSTRUMENTATION AND PHOTOGRAPHY |
| レポートNO | 77A29281 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/438431 |
