File:NetTrack Operation.jpg
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Summary
| Description |
English: Operation of a special-purpose underwater acoustic positioning system for the real-time measurement of the geometry and opening area of a fish sampling trawl net. Left: Four small responders (A, B, C, D) are mounted in the corners of the trawl net opening and wired via junction bottle (E) and umbilical (F) to a surface station computer. Center: The net is deployed. Right: The surface station computer sends instructions to one responder (ex. A) to transmit, while instructing the other responders (ex. B, C, D) to receive. By this method all six distances (A-B, A-C, A-D, B-C, B-D, C-D) are measured. The four sides of the opening and one diagonal are used to triangulate the trawl net opening geometry and area. The second diagonal is available to compute a measurement error metric for data quality verification. |
| Date | |
| Source | Own work |
| Author | Desertstar |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:58, 10 March 2009 | | 2,201 × 600 (579 KB) | Desertstar | {{Information |Description={{en|1=Operation of a special-purpose underwater acoustic positioning system for the real-time measurement of the geometry and opening area of a fish sampling trawl net. Left: Four small responders (A, B, C, D) are mounted in t |
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