Ice Drift in Robeson Channel as Determined Using Television Moving Target Circuitry.

• Main Authors: Henderson,I. H. S., Paquet,F.
• Other Authors: DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)
• Format: Text
• Language: English
• Published: 1974
• Subjects: Physical and Dynamic Oceanography; Snow; Ice and Permafrost; *DRIFT; *SEA ICE; MEASUREMENT; OCEAN CURRENTS; CANADA; WIND; TRACKING; TIDAL CURRENTS; ARCTIC REGIONS; GREENLAND; MOVING TARGET INDICATORS; TELEVISION CAMERAS; CLOSED CIRCUIT TELEVISION; ELLESMERE ISLAND; VIDEO TAPE RECORDING; *Robeson Channel; Arctic; Canada; Ellesmere Island; Greenland; Robeson Channel; Ice; permafrost; Robeson channel; Sea ice
• Online Access: http://www.dtic.mil/docs/citations/ADA010397; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA010397

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.