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SECOAS
results
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The graph below shows how pressure varied over the two week trial at 3 of the sensor sites. The y-axis is not calibrated, the true depth of sensor 1 was 3-5m and the true depth of sensor 6 was 9-11m. The variation corresponds to tides ebbing and flowing. Sensor 3 had a range error, cuased by sliding down the sandbank to a greater depth than expected (needs an autocalibrate fn next time). |
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This graph shows radio performance over 24 hours - the performance degrades at high tides, because the waves are bigger, and obscure the aerials more often |
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