Edgerton Lab Notebook 22, Page 19:
March 12, 1954
- Page start date:
- March 12, 1954
- Content type:
- diagram,notes
- Transcription:
- Sonar signal for Bottom indicator.
Methods.
1. Pinger works continuously until camera is on bottom.
2. Camera makes one big ping when it hits bottom.
3. Camera makes series of pings on the bottom.
Method No. 1. would be best with a signal keyed into the regular sonar signals to reinforce the echo. There might be some confusion due to angles.
Method No. 2. could also have regular pings at long time intervals - depending upon change to not have two ping signals at once.
A fourth method would involve a method of resolving the direct and reflected ping from the bottom. The time between would be the height above the bottom.
[schematic & diagram]
- Keywords:
- bottom indicator
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