A rapid method for recovery of data from expendable surface current probes |
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| Authors: | GL Hufford IM Lissauer |
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| Institution: | 1. Alaska Outer Continental Shelf Office, BLM, Anchorage, Alaska U.S.A.;2. U.S. Coast Guard R&D Center, Groton, Connecticut 06340, U.S.A. |
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| Abstract: | A sighting device, called a “probe sight”, is described which simplifies the measurement, taken, from a helicopter, of the float separations from a deployed expendable surface current probe. The separation distance between the floats (along with a known time release) is a measure of the surface current speed. The sighting device can be used at any altitude. Comparisons of the readings using the probe sight and the “normal” measurements taken from aerial photographs for 180 stations in the Chukchi Sea, show that the difference between the two methods is less than 10% when the current speed is greater than 10 cm sec−1. The largest difference (15%) occurs at those stations where the current speed is less than 10 cm sec−1. |
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