Multimedia Gallery
- Topic: Satellite Navigation
The Manpack was one of the first portable GPS receivers for combat troops.
Quartz oscillator used to control radio frequency on Transit satellites.
Set in an electrical circuit, a crystal resonator vibrates regularly and becomes an oscillator to control radio frequencies.
A corn and soybean farmer from Rippey, Iowa.
Farmer Roy Bardole, seated in his office, views an agricultural GPS image on his computer monitor while field maps are laid out on his desk.
Farmer Roy Bardole seated at the controls of his combine in a cornfield on farm in Iowa. A GPS guidance system display is mounted at the top center on right side of cab.
This atomic clock was built for the first GPS satellites in the late 1970s.
Electronics Technician 1st Class David Schlessinger on board the USS Alabama.
The GPS Operations Center at Schriever Air Force Base in Colorado Springs controls the GPS satellites.
Sandia National Laboratories researcher Darwin Serkland measures the wavelength of a tiny laser for chip-scale atomic clocks.
