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Briefs: Electronics & Computers
As electronic circuits become more densely packaged and higher in power, maintaining them within permissible temperature ranges becomes a major issue. This is especially true in the case of...
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Briefs: Electronics & Computers
Estimating Attitude From GPS Measurements on One Antenna
A technique for estimating the boresight direction of a Global Positioning System (GPS) receiver antenna involves utilization of the relationship between the strengths of received signals and the direction-dependent antenna gain pattern. The technique is fundamentally different from, and...
Briefs: Electronics & Computers
Control System for Steerable, Rooftop-Mounted Antenna
An excerpt from JPL Document D-12104 presents additional information on the control system of a steerable microwave antenna that is mounted on the roof of a land vehicle and used to communicate with a geostationary satellite. The antenna and control system were described previously in...
Briefs: Physical Sciences
We have developed an apparatus that generates a pulsed beam of fast oxygen atoms, under Small Business Innovation Research (SBIR) funding by NASA's Jet Propulsion Laboratory, to...
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Briefs: Physical Sciences
A method of satellite radar interferometry (SRI) enables the remote measurement of three-dimensional velocities of ice flow over large areas of glaciers. At present,...
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