Hog Island Data Preview

From the July 31, 07 redeployment

Storage Node Summary

• Data from July 31 to August 13, 2007• Storage node 22

– 1,780,730 records, 7228 corrupt– Coverage: 2, 8, 14, 20– Data from: 14, 20

• Storage node 24– 2,095,516 records, 8213 corrupt– Coverage: 4, 7, 10, 16, 19– Data from: 4, x, 10, 16, 19

• Storage node 25– 2,113,593 records, 8714 corrupt– Coverage: 1, 3, 5, 11, 13, 17– Data from: 1, 5, 11, 13

Nodes 2, 3, 8, 17, 23 were not responsive at deployment-time.

Sensor Locations

SN14 SN20

SN4 SN10 SN16 SN19

Battery andBias Voltage

SN5SN1 SN13SN11

Light Data

Open Questions

• Data xmitted vs. received vs. stored?

• SN14,11 sensor decay

• SN13 daytime-only

• How to calibrate with bias voltage?

• Storage nodes operate down to 2V also?

• Reason for corrupt data?