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Concepts, Instruments, The Depot
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Paths Less Taken
Measuring The Planet
Concepts, Instruments, The Depot
Paths Less Taken
Conceptual diagram of satellite triangulation. Not system used byCoast and Geodetic Survey.
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Diagram showing conceptual photographs of satellite versus star backgroundwould appear from three different locations on the surface of the earth. For best results, satellites had to be observed from three camera stationssimultaneously.
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The worldwide satellite triangulation camera station network.
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Conceptual planned method of tieing a worldwide satellite triangulationnetwork together. The corners of the large polygons on the earth's surface were representations of BC-4 camera stations. Ideally the stations would be atleast 1,000 miles apart
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A modified BC-4 satellite triangulation camera used inthe world-wide triangulation program. The original BC-4 had a 350 mm focallength while the modified camera used in the program had a 450mm focal length.
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The instrument system used in the satellite triangulation program.The large instrument consol on the left is the electronic synchronization unit while the modified BC-4 camera used for observations is on the right.
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A global model of the satellite triangulation network.
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System used to measure satellite locations relative to fixed star background.This operation was conducted in the office by photogrammetry experts. Theplates were sent from camera stations around the world to headquarters forprocessing.
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The satellite triangulation world-wide network. Notice void in Soviet Union andadjacent Communist bloc countries as the Cold War was at its height duringthese years.
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Diagram used to explain theory behind satellite triangulation program.
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Different colors on map display different phases of satellite triangulationprogram.
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Typical photograph plate showing stars in circular pattern and satellite imageshowing as series of dots in straight line.
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Inside of BC-4 camera showing shutter gears on upper portion of photo,lens in center, and various electronic connections for timing shutter openingand communicating with synchronization unit.
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Map showing phase 1 densification network used to improve North Americancontrol network.
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Diagram used to explain theory behind satellite triangulation program.
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Electronic shelter on right used to house synchronization consol while the domeon the right was the camera dome for housing the BC-4 camera. The BC-4 is shownin operating position. A cover latches onto the opening when the camera is notin use.
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6001 Executive Boulevard, Rockville, Maryland, designated the WashingtonScience Center. The home of the Coast and Geodetic Survey and the headquartersof the satellite triangulation program. This building was brand new at the time. It was razed in
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Aerial view of BC4 support facility at Beltsville.
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Station Number 002
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Astacus similus .... A lobster illustration from early marine fish catalog. In:Specula physico-mathematico-historica .... by Johann Zahn.1696Library Call Number Q155 .Z33 1696.
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