Texas Instruments GPS Receiver

Texas Instruments GPS Receiver

Soon after the first NAVSTAR satellites were up and functioning, the federal government joined with academia and industry to develop a "man-portable, field-deployable" GPS receiver suitable for surveying. The resulting TI 4100, produced by Texas Instruments, used computer software developed by the Naval Surface Warfare Center. Introduced in 1982, the TI 4100 remained on the market until 1989, and cost $119,900 (plus another $19,950 for post-processor hardware and software).
Described as a "commercial positioning and navigation system that is rugged enough to withstand marine, land, and airborne geophysical exploration applications," it indicated location within about 14 meters, speed within a tenth of a knot, and time within nanoseconds. When used in the differential mode, positions were accurate to within 2-5 meters. It could accept the C/A and P signals broadcast over the two L-band frequencies (L1 and L2) from up to four GPS satellites at the same time. This unit came from New Mexico State University, which apparently obtained it from Holloman Air Force Base.
One inscription on this power supply reads "Lambda Electronics / Melville, L.I. N.Y. / A Division of VEECO Instruments, Inc." Another reads "Lambda Model LYS-P-28 regulated Power Supply / Input:105-132 VAC / 47-63 HZ OR 130 to 160 VDC 536 W. Max / Output 28+/- 5% VDC" and Assembled in Mexico."
Ref: Texas Instruments TI 4100 NAVSTAR Navigator.
James Collins "The Global Position System for Surveying Today!" P.O.B. (Dec. 1982-Jan. 1983): 54.
Currently not on view
Object Name
gps receiver / power supply
Texas Instruments
overall: 13 cm x 25.5 cm x 11.5 cm; 5 1/8 in x 10 1/32 in x 4 17/32 in
ID Number
accession number
catalog number
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Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History
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The Physical Sciences Laboratory at NMSU operated a series of ground monitoring stations for the Defense Mapping Agency. These stations were often manned by graduate students from NMSU. There were several sites around the world. Some of them were Bangkok, Buenos Aires, Bahrain, and Ascension Island. This TI4100 most likely was obtained from the Defense Mapping Agency.

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