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NOAA's Geodesy Collection
Catalog of Images

1 thumbnail picture
Conceptual diagram of satellite triangulation. Not system used by Coast and Geodetic Survey.
2 thumbnail picture
Diagram showing conceptual photographs of satellite versus star background would appear from three different locations on the surface of the earth. For best results, satellites had to be observed from three camera stations simultaneously.
3 thumbnail picture
The worldwide satellite triangulation camera station network.
4 thumbnail picture
Conceptual planned method of tieing a worldwide satellite triangulation network together. The corners of the large polygons on the earth's surface were representations of BC-4 camera stations. Ideally the stations would be at least 1,000 miles apart and the apices of equilateral triangles.
5 thumbnail picture
A modified BC-4 satellite triangulation camera used in the world-wide triangulation program. The original BC-4 had a 350 mm focal length while the modified camera used in the program had a 450mm focal length.
6 thumbnail picture
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.
7 thumbnail picture
A global model of the satellite triangulation network.
8 thumbnail picture
System used to measure satellite locations relative to fixed star background. This operation was conducted in the office by photogrammetry experts. The plates were sent from camera stations around the world to headquarters for processing.
9 thumbnail picture
The satellite triangulation world-wide network. Notice void in Soviet Union and adjacent Communist bloc countries as the Cold War was at its height during these years.
10 thumbnail picture
Diagram used to explain theory behind satellite triangulation program.
11 thumbnail picture
Different colors on map display different phases of satellite triangulation program.
12 thumbnail picture
Typical photograph plate showing stars in circular pattern and satellite image showing as series of dots in straight line.
13 thumbnail picture
Inside of BC-4 camera showing shutter gears on upper portion of photo, lens in center, and various electronic connections for timing shutter opening and communicating with synchronization unit.
14 thumbnail picture
Map showing phase 1 densification network used to improve North American control network.
15 thumbnail picture
Diagram used to explain theory behind satellite triangulation program.
16 thumbnail picture
Electronic shelter on right used to house synchronization consol while the dome on the right was the camera dome for housing the BC-4 camera. The BC-4 is shown in operating position. A cover latches onto the opening when the camera is not in use.
17 thumbnail picture
6001 Executive Boulevard, Rockville, Maryland, designated the Washington Science Center. The home of the Coast and Geodetic Survey and the headquarters of the satellite triangulation program. This building was brand new at the time . It was razed in the late 1990's.
1964 April
18 thumbnail picture
Station Number 001 -occupied 1/22/66 to 3/18/66 Party chief Sherrill Snellgrove of C&GS. Observations were conducted during the period when there were approximately 20 hours of darkness and 4 hours of twilight. As the PAGEOS satellites were in near polar orbit, this allowed observation of 4 to 5 passes per night.
Thule, Greenland
19 thumbnail picture
Station Number 001 -occupied 1/22/66 to 3/18/66 Party chief Sherrill Snellgrove of C&GS The camera dome at Thule.
Thule, Greenland
20 thumbnail picture
Station Number 001 -occupied 1/22/66 to 3/18/66 Party chief Sherrill Snellgrove of C&GS Installing a VLF antenna to aid with time signal reception. The synchronization unit was inside the warehouse.
Thule, Greenland
21 thumbnail picture
Station Number 001 -occupied 1/22/66 to 3/18/66 Party chief Sherrill Snellgrove of C&GS Installing cables to connect VLF antenna to receiver in the the synchronization console in the warehouse.
Thule, Greenland
22 thumbnail picture
Station Number 001 -occupied 1/22/66 to 3/18/66 Party chief Sherrill Snellgrove of C&GS 100 mph winds would drive snow into the camera dome in spite of dome cover and weather stripping being installed. Winds of this nature would freeze exposed human flesh in a matter of seconds.
Thule, Greenland
23 thumbnail picture
Station Number 001 -occupied 1/22/66 to 3/18/66 Party chief Sherrill Snellgrove of C&GS Paul Spofford, assistant chief of party in the warehouse with synchronization console.
Thule, Greenland
24 thumbnail picture
Loading a synchronization console on a truck for shipment at the Beltsville support facility.
Maryland, Beltsville
25 thumbnail picture
Station Number 002 - occupied successively in 1964 and 1965 Party Chiefs, Charles Burroughs, Sherrill Snellgrove, and Bob Stevens
Maryland, Beltsville
26 thumbnail picture
Station Number 002 - occupied successively in 1964 and 1965 Party Chiefs, Charles Burroughs, Sherrill Snellgrove, and Bob Stevens Hooking the "Goat" to the truck for shipment.
Maryland, Beltsville
27 thumbnail picture
Station Number 002 - occupied successively in 1964 and 1965 Party Chiefs, Charles Burroughs, Sherrill Snellgrove, and Bob Stevens Lieutenant Dee Kimball, ESSA Corps, in truck and Charles Clarke loading a camera dome for shipment.
Maryland, Beltsville
28 thumbnail picture
Station Number 002 - occupied successively in 1964 and 1965 Party Chiefs, Charles Burroughs, Sherrill Snellgrove, and Bob Stevens
Maryland, Beltsville
29 thumbnail picture
Larry Schenkat, Chief of Timing Section, with a portable quartz crystal clock. It was used to check the mobile BC4 units' clocks.
Maryland, Beltsville
30 thumbnail picture
Station Number 002 - occupied successively in 1964 and 1965 Party Chiefs, Charles Burroughs, Sherrill Snellgrove, and Bob Stevens Charles Clarke, Chief Electronics Technician, at Beltsville.
Maryland, Beltsville
31 thumbnail picture
Station Number 002 - occupied successively in 1964 and 1965 Party Chiefs, Charles Burroughs, Sherrill Snellgrove, and Bob Stevens Chief Electronic Technician Jerry Reed.
Maryland, Beltsville
32 thumbnail picture
Larry McClure, radio operator, and friend at going away party for Roy Anderson
Maryland
33 thumbnail picture
Aerial view of BC4 support facility at Beltsville.
Maryland, Beltsville
34 thumbnail picture
Station Number 002 - occupied successively in 1964 and 1965 Party Chiefs, Charles Burroughs, Sherrill Snellgrove, and Bob Stevens
Maryland, Beltsville
35 thumbnail picture
Loading BC4 unit on a USAF C-124 cargo plane at Andrews Air Force Base.
Maryland, Andrews Air Force Base
36 thumbnail picture
Jerry Reed, Gale Rutstein, Dee Kimball, and Sherrill Snellgrove at the BC4 support facility at Beltsville.
Maryland, Beltsville
37 thumbnail picture
Station Number 003 - occupied in 1965 and 1966 Party chiefs - George Cole, Slim Pickens, and Jeff Gammon. 47 11 7 North Latitute. 240 39 44 East Longitude.
Washington, Moses Lake
38 thumbnail picture
Station Number 003 - occupied in 1965 and 1966 Party chiefs - George Cole, Slim Pickens, and Jeff Gammon. 47 11 7 North Latitute. 240 39 44 East Longitude.
Washington, Moses Lake
39 thumbnail picture
Station Number 003 - occupied in 1965 and 1966 Party chiefs - George Cole, Slim Pickens, and Jeff Gammon 47 11 7 North Latitute. 240 39 44 East Longitude.
Washington, Moses Lake
40 thumbnail picture
Station Number 003 - occupied in 1965 and 1966 Party chiefs - George Cole, Slim Pickens, and Jeff Gammon. 47 11 7 North Latitute. 240 39 44 East Longitude.
Washington, Moses Lake
41 thumbnail picture
Station Number 004. 52 42 49 North Latitude. 174 07 26 East Longitude.
Shemya, Aleutian Islands, Alaska
42 thumbnail picture
Station Number 004. 52 42 49 North Latitude. 174 07 26 East Longitude.
Shemya, Aleutian Islands, Alaska
43 thumbnail picture
Station Number 004. 52 42 49 North Latitude. 174 07 26 East Longitude.
Shemya, Aleutian Islands, Alaska
44 thumbnail picture
Station Number 004. 52 42 49 North Latitude. 174 07 26 East Longitude.
Shemya, Aleutian Islands, Alaska
45 thumbnail picture
Station Number 004. 52 42 49 North Latitude. 174 07 26 East Longitude.
Shemya, Aleutian Islands, Alaska
46 thumbnail picture
Station Number 004. 52 42 49 North Latitude. 174 07 26 East Longitude.
Shemya, Aleutian Islands, Alaska
47 thumbnail picture
Station Number 004. 52 42 49 North Latitude. 174 07 26 East Longitude.
Shemya, Aleutian Islands, Alaska
48 thumbnail picture
Station Number 006 - occupied 2/10/66 to 3/31/66. Party chief - Slim Pickens. 69 39 44 North Latitude. 18 56 28 East Longitude.
Tromso, Norway
49 thumbnail picture
Station Number 006 - occupied 2/10/66 to 3/31/66. Party chief - Slim Pickens. 69 39 44 North Latitude. 18 56 28 East Longitude.
Tromso, Norway

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Last Updated:
April 30, 2013