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Focus on Test & Measurement Each month, NTB highlights tech briefs related to a particular area of technology in a special section called Technology Focus. Here are some of the technologies featured in the June issue focus on Test & Measurement. Multi-Antenna Radar System for Doppler Rain Measurements A team at NASA's Jet Propulsion Lab is using multiple-antenna radar systems aboard moving high-altitude platforms for measuring rainfall. The platform would be a spacecraft or aircraft. The principle of the system is a variation of along-track interferometric synthetic-aperture radar systems used to measure ocean waves and currents. The system includes two antennas that perform cross-track scans at different positions. (Page 22)

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Techologies of the Week



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Hurricane Simulator



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Current Attractions

In-Orbit Ultrasounds Conducted Onboard Space Vehicles Medical imaging technology has led to quicker diagnoses of conditions that, when caught early, can be treated. Because such devices are large, however, they are impractical in the limited area of a space vehicle. An on-going NASA project to address the issue involves image fusion, where in-orbit ultrasounds would be combined with previously done Earth-bound scans that are more informative. NASA Tech Briefs spoke with Dr. Richard Boyle, the project's principal investigator.

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Technology Business Briefs

Methodology for Providing Secure Time Stamps or Signals for Documents and Other Computer Files The secure time stamps include an externally generated time signal. More information here.

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Monitoring Darfur



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Climate Modeling



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