Ice Drift in Robeson Channel as Determined Using Television Moving Target Circuitry.
The movement of ice floes in Robeson Channel was followed over a one-week period during August 1973 using television moving-target circuitry from a cliffside base 350 m above sea level. The basis of the method was to subtract a current TV picture from a video tape recording of the same scene made so...
Main Authors: | , |
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Other Authors: | |
Format: | Text |
Language: | English |
Published: |
1974
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Online Access: | http://www.dtic.mil/docs/citations/ADA010397 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA010397 |
Summary: | The movement of ice floes in Robeson Channel was followed over a one-week period during August 1973 using television moving-target circuitry from a cliffside base 350 m above sea level. The basis of the method was to subtract a current TV picture from a video tape recording of the same scene made some time previously, the difference imagery being displayed on a monitor. The TV camera was aimed to produce coincidence of a reference point selected near the center of the pre-recorded imagery, and the changes in azimuth and elevation recorded. From these, ice drift velocities were calculated. Errata sheet inserted. |
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