Special Coverage

Home

Software-Defined Radio Software Aids Development of Space Telecommunications

NASA’s John Glenn Research Center in Cleveland, OH, has chosen the Green Hills Platform for Software Defined Radio (SDR) — with Spectrum Signal’s flexComm™ SDR- 4000 communications platform — for the rapid design, development, and refinement of its next-generation Space Telecommunications System Architecture. The Green Hills SDR Platform includes the INTEGRITY® RTOS, a POSIX.1- conformant real-time operating system certified by the IEEE to the POSIX 1003.1 standard; a dual-mode IPv4 networking stack support; and waveform design and development tools.

Posted in: Application Briefs

Read More >>

Clearer Images on Near Infrared Camera Made Possible with Filters

The James Webb Space Telescope (JWST) is scheduled for launch in 2013 and aims to unravel the history of earlier galaxies, linking the Big Bang to the Milky Way Galaxy. JWST’s Near InfraRed Camera (NIRCam) is a filter-based instrument covering the spectral range of 0.6 to 5.0 microns. The Principle Investigator for NIRCam is Dr. Marcia Reike of the University of Arizona, while the Advanced Technology Center (ATC) of Lockheed Martin is responsible for its manufacture, integration, and testing. Barr Associates recently was selected to design, manufacture, and test 30 filters for the JWST NIRCam. Barr previously provided spaceflight filters for Lockheed Martin ATC, including those for the Solar-B and shuttle glow experiments.

Posted in: Application Briefs

Read More >>

Emerging Trends in Medical Diagnostics and Therapy

New technologies are providing doctors and patients with more options for treatment and improved quality of life than ever before. Procedures once entailing long recovery times and scarring may now be done almost painlessly and without significant disfigurement. Drug therapies are being tailored to target specific aspects of a disease, and donor organs can be grown from sources from which rejection is eliminated. These approaches in medicine reflect a more focused ideology when confronted with injury and disease.

Posted in: Articles

Read More >>

NASA Technology Provides Secure Networks for First Responders

In 2003, engineers at NASA’s Glenn Research Center in Cleveland, OH, sent a miniature Cisco router into low Earth orbit on a satellite, proving that Internet Protocols can be used to communicate with satellites. “We wanted to put the Internet in space because it will make it far easier to design, build, test, and later operate new satellite systems,” said Phil Paulsen, project manager in Glenn’s Space Communications Office.

Posted in: UpFront

Read More >>

NASA Spinoff Brings Nanotechnology to Market

NASA’s Goddard Space Flight Center in Greenbelt, MD, licensed its patented technique for manufacturing high-quality, single-walled carbon nanotubes (CNTs) to Idaho Space Materials (ISM) in Boise. Carbon nanotubes based on this process are being used by researchers and companies working on the next generation of composite polymers, metals, and ceramics that will impact almost every facet of life.

Posted in: UpFront

Read More >>

Bare Conductive Tether for Decelerating a Spacecraft

A document describes a prototype of electrically conductive tethers to be used primarily to decelerate spacecraft and/or generate electric power for the spacecraft. Like prior such tethers, this tether is designed so that when it is deployed from a spacecraft in orbit, its motion across the terrestrial magnetic field induces an electric current. The Lorentz force on the current decelerates the spacecraft. Optionally, the current can be exploited to convert some orbital kinetic energy to electric energy for spacecraft systems. Whereas the conductive portions of prior such tethers are covered with electrical insulation except for end electrodes that make contact with the ionosphere, this tether includes a conductive portion that is insulated along part of its length but deliberately left bare along a substantial remaining portion of its length to make contact with the ionosphere. The conductive portions of the tether are made of coated thin aluminum wires wrapped around strong, lightweight aromatic polyamide braids. The main advantages of the present partly-bare-tether design over the prior all-insulated-tether design include greater resistance to degradation by the impact of monatomic oxygen at orbital altitude and speed and greater efficiency in collecting electrons from the ionosphere.

Posted in: Briefs, TSP

Read More >>

Staggering Inflation To Stabilize Attitude of a Solar Sail

A document presents computational simulation studies of a concept for stabilizing the attitude of a spacecraft during deployment of such structures as a solar sail or other structures supported by inflatable booms. Specifically, the solar sail considered in this paper is a square sail with inflatable booms and attitude control vanes at the corners. The sail inflates from its stowed configuration into a square sail with four segments and four vanes at the tips. Basically, the concept is one of controlling the rates of inflation of the booms to utilize in mass distribution properties to effect changes in the system’s angular momentum.

Posted in: Briefs, TSP

Read More >>

White Papers

Electroforming Basics
Sponsored by Servometer
Linear Motors Application Guide
Sponsored by Aerotech
It Takes Two: Benefits of Using Laser Beam Welding Together with Electron Beam Welding
Sponsored by Joining Technologies
Oscilloscope Fundamentals
Sponsored by Rohde and Schwarz A and D
Cultural audits: What are they and why are they essential?
Sponsored by B Braun
Smoothing the Transition from Design to Manufacture: Best Practices
Sponsored by Sparton

White Papers Sponsored By: