Notes

Slide Show

Outline

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2	The Design
3	The Design SOLUTION 1. Carry onboard GPS receiver 2. Log all data for later recovery and analysis. Therefore must recover buoy!!! 3. Use SERVICE ARGOS to transmit approximate position to shore 4. Use ARGOS handheld receiver to home in on buoy for recovery
4	The Design BUOY OPERATING PARAMETERS 1. Power: Alkaline D cell battery pack 15VDC 2. Operating lifetime approximately 30 days 3. GPS receiver: Motorola ONCORE 12 channel ($120 including antenna) 3. Sample rate: one GPS position every 4 minutes to one GPS position every hour 4. Onboard memory capacity: 16384 positions (date, time, lat, lon, pdop, status) 6. Setup, checkout and data download thru serial port 7. Transmits three most recent positions to shore via SERVICE ARGOS 8. Small surface profile to minimize wind drag 9. Weight approximately 5.5kg (13 pounds)
5	The Electronic Block Diagram
6	The Electronic
7	The Electronic
8	The Electronic
9	The Drifter
10	The Drifter
11	Drifter Sea Test
12	Drifter Sea Test After drogue, the drifters almost went with the current with very low influence of the wind (lest than 5%).
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14	The Study
15	The Study
16	The deployment
17	The recovery
18	The Results
19	The Results
20	The Results 5 Cruises 69 drifters deployed 100 % drifter & data recovery