Communications

9-Meter Slaving System

The objective of the 9-Meter Slaving System is to transmit Launch Trajectory Acquisition System (LTAS) data from one of multiple incoming data streams to the 9-Meter antenna control unit using a synchronous serial modem. The data stream is determined by a 9-Meter telemetry operator's selection via a graphical user interface (GUI).

Posted in: Briefs, Communications, Trajectory control, Antennas, Telemetry, Antennas, Telemetry, Entry, descent, and landing
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Ad Hoc Selection of Voice Over Internet Streams

This flexible system is applicable to a wide variety of systems, including office communications and telemedicine.

NASA seeks interested parties to license the Ad Hoc Selection for Voice Over Internet (VoIP) Streams technology developed by engineers at Johnson Space Center. This technology features the ability to select specific audio streams from one or more sources and then convert them into a multicast to the user's audio player. This selection ability benefits the user by allowing a wide range of information and/or data to be monitored from a remote location using existing network technologies in near real time. For example, a user with a personal computer equipped with special-purpose audio player software first needs to launch the program and provide an identification and a password. Once both access control checks are completed, the audio software graphic is displayed, including audio stream and volume control buttons. The user can now select up to 21 streams to monitor simultaneously.

Posted in: Briefs, Communications, Communication protocols, Computer software / hardware, Computer software and hardware, Internet, Telecommunications systems, Communication protocols, Computer software / hardware, Computer software and hardware, Internet, Telecommunications systems
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Deep-Space Positioning System

NASA's Jet Propulsion Laboratory (JPL) has developed a compact, low-power, self-contained instrument that provides the equivalent of GPS throughout the solar system without the aid of an artificially provided infrastructure. The state-of-the-art X-ray navigation instrument is also able to determine the position of a spacecraft anywhere in the solar system, but it cannot provide this information relative to the Earth, the Sun, or any other remote target body (the equivalent of GPS providing a user's position relative to a vehicle, a second user, or any other moving target). JPL's uniquely capable deep-space positioning system determines the position and the target-relative position of a spacecraft anywhere in the solar system using optical navigation, which makes it ideally suited for any spacecraft requiring deep-space navigation services.

Posted in: Briefs, Communications, Navigation and guidance systems, Navigation and guidance systems, Radiation, Spacecraft
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GPS Satellite Geometry Analysis Tool (GPSGEM)

The purpose of the GPS Satellite Geometry Analysis Tool (GPSGEM) is to evaluate GPS satellite geometry for a given Earth-fixed location or for a provided trajectory. The tool will generate a listing of all satellites in view, the best satellite combination defined by the most optimum Geometric Dilution of Precision (GDOP), the GDOP profile expected if all satellites are available, and the worst-case GDOP profile when one or two satellites are removed from the available constellation. The tool will provide the navigation controller with insight into the expected performance of the GPS constellation, and allow an assessment of the implications to onboard navigation performance for the ascent, orbit, abort, and entry phases of flight.

Posted in: Briefs, Communications, Finite element analysis, Global positioning systems, Global positioning systems (GPS), Spacecraft guidance, Global positioning systems, Global positioning systems (GPS), Spacecraft guidance, Entry, descent, and landing, Satellites
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The Path to V2X Using Digital Short Range Communication (DSRC)

In Conjunction with SAE

In December 2016 NHTSA published a notice of proposed rule-making requiring automakers to equip their vehicle fleets with Digital Short Range Communication (DSRC) technology starting in 2019. This Tech Talk discusses key use cases for implementing the DSRC, as well as relevant information on standards, technology, and testing. It also provides the opportunity for the audience to ask questions.

Posted in: Tech Talks, Communications
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Q&A: Photonics Breakthrough 'Tunes' Wireless Communications

A chip-scale optical device, developed by a team from the University of Sydney’s Australian Institute for Nanoscale Science and Technology, achieves radio frequency signal control at sub-nanosecond time scales. The photonics breakthrough has the potential to provide broader bandwidth instantaneously to more users.

Posted in: News, Communications, Optical Components, Optics, Photonics
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Darmindra Arumugam, Senior Research Technologist, Jet Propulsion Laboratory, Pasadena, CA

In outdoor locations, firefighters and emergency responders can use GPS technology to track one another. Indoor environments like high-rises and steel-reinforced structures, however, frequently block radio signals. With the development of POINTER (Precision Outdoor and Indoor Navigation and Tracking for Emergency Responders), Darmindra Arumugam has addressed the sensing challenge, and provided a potentially game-changing tool for search and rescue teams.

Posted in: Who's Who, Communications
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The Reality of Application Security: Scare Tactics or Genuine Threat?

Guardians of application security have perhaps become slightly immune to the fearful messages of cybersecurity vendors. The combination of ‘Big Data’ with an exponentially growing Internet of Things (IoT) would seem to provide the perfect storm conditions for the exploitation of vulnerable code streams. Read this whitepaper about the reality of AppSec to discover what are the real risks and how to mitigate them.

Posted in: White Papers, Automotive, Communications, Electronics & Computers, Information Sciences
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In five years, will light-enabled Wi-Fi "find a home?"

This week’s Question: A PhD student at Eindhoven University of Technology has developed a way of using infrared rays to carry wireless data to a laptop or smartphone. The wireless data comes from central "light antennas" that could, for example, be mounted on a ceiling to direct the rays of light supplied by an optical fiber. With no moving parts, the system requires no power. Project head Tom Koonen estimates that the technology could be installed in homes and stores in five years. What do you think? In five years, will light-enabled Wi-Fi "find a home?"

Posted in: Question of the Week, Communications, Wireless
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Testing eCall: How Developers Can Use an eCall Simulator to Optimize IVS Designs

The complexities of the modern cars continue to increase with more and more technology being added to support new communications applications and safety features.

Posted in: White Papers, Automotive, Communications, Electronics & Computers
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