Keyword: Transmissions

Briefs: Communications

NASA has developed a new technology for space optical communications, including communications from the Earth to spacecraft in Earth orbit and in deep space, such as at the Moon and Mars. The...

Briefs: Communications
Using a Power Grid as an Extremely Large Antenna for Geophysical Imaging

Geomagnetic storms drive geomagnetically induced currents (GICs) in high-voltage power transmission systems. GICs thus carry information about the near-space environment conditions. The U.S. high-voltage power transmission system was used as an extremely large antenna to...

Briefs: Electronics & Computers

NASA’s Jet Propulsion Laboratory has developed a low-loss dielectric waveguide that provides a simple, versatile, and flexible transmission medium. Dielectric waveguides — long, solid pieces of...

Briefs: Electronics & Computers
Design of Double Layer Rectenna Array for Fault Isolation of Schottky Diode in Operation Beyond V-Band Frequencies

Microwave power transmission using rectenna technology has attracted a strong interest in conjunction with wireless electric power delivery to infrastructure and subjects located at a remote place. A typical rectenna, which is a...

Briefs: RF & Microwave Electronics
Simple Impedance Matched Planar Microwave Blocking Filter

Thermal blocking filters find wide use in cryogenic applications ranging from quantum computing to ultra-low-noise detectors. They can be used to provide the environmental isolation between cooled devices and the warmer temperature supporting bias and readout circuitry. In particular,...

Articles: Photonics/Optics

There are many different types of filters in machine vision that can be utilized to improve or change the image of the object under inspection. It is important to understand the different technologies behind the...

Briefs: Robotics, Automation & Control
Multi-Spacecraft Autonomous Positioning System/Network-Based Navigation

Current deep spacecraft rely heavily on ground-based navigation and tracking for state measurement. The requirement for long ground navigation passes, coupled with analysis support, produces a large latency for updating a vehicle’s state. As the current infrastructure...

Briefs: Electronics & Computers
Radiation-Hardened 10BASE-T Ethernet Physical Interface (PHY)

The EXPRESS Logistics Carrier (ELC) system was built by NASA Goddard for installation on the International Space Station (ISS). Four ELC systems are on ISS. Each ELC site includes two data nodes. The ELC requirements call for a radiation-hardened 10BASE-T Ethernet interface at each...

Briefs: Communications
Final High-Fidelity Down-Conversion Source for Secure Communications Using On-Demand Single Photons

Secure communication over long distances requires robust encryption. While current encryption algorithms exist using classical methods, there are no unconditionally secure methods of distributing encryption keys classically. However, by exploiting...

Briefs: Communications
Communication System and Method Over High-Latency, Low-Bandwidth Networks

In high-latency, low-bandwidth networks such as those employed when communicating with an extraterrestrial object via wireless communication over hundreds or thousands of miles, it may be difficult or expensive to communicate large quantities of information in a reliable...

Briefs: Communications
SCaN Optical Link Budget Tool

In response to the requirements of the Space-Based Relay Study (SBRS) undertaken by NASA in 2013, as well as the Integrated Radio and Optical Communications (iROC) project being conducted by NASA Glenn Research Center (GRC) beginning in 2012, a calculation procedure was required to rapidly assess the operation of...

Briefs: Electronics & Computers
Control Software for Integrated CW Radar Module

This software controls the behavior of a miniaturized microwave radar module. It controls the hardware, digitizes raw samples from the analog output of the module, and applies DSP (digital signal processing) algorithms to the data stream to reduce the bandwidth and data rate. It also implements an...

Articles: Sensors/Data Acquisition

Successful magnetic circuits are built upon proper planning and design principles. Experienced design engineers take a holistic approach to the design process by considering the...

Briefs: Information Technology
Software Framework for Control and Observation in Distributed Environments (CODE)

CODE is a framework for control and observation in distributed environments. The framework enables the observation of resources (computer systems, storage systems, networks, and so on), services (database servers, application execution, servers, file transfer...

Briefs: Test & Measurement
Vector Network Analyzer Calibration for Quasi-Optical Dual Ports

It is desirable to measure the electromagnetic properties of devices and materials in the millimeter part of the spectrum. For guided wave-based devices and materials (waveguides, coaxial devices), a vector network analyzer (VNA) is an excellent tool for this purpose since it...

Briefs: Data Acquisition
Free Space Optical Receiver for Data Detection and Radio Science Measurements

For deep space communication systems, the decision of whether or not to suppress the transmitted carrier has always been an issue. For certain missions that use high data rates, the available bandwidth might be a limiting factor. In such cases, it is preferred to use a...

Briefs: Aerospace
NASA Aircraft Management Information System (NAMIS)

The NASA Aircraft Management Information System (NAMIS) is an Enterprise Resource Planning/Mission Support software suite designed to meet both the mission support requirements and the business management requirements of NASA Johnson Space Center’s (JSC) Aircraft Operations Division (AOD)....

Briefs: Communications
VCSEL Laser Array for Communications

Optical communications in terrestrial and space environments require transmitted signals on the order of 40 GHz and higher, because of the uncertain and changing transmission environments. A robust communications system is needed that will provide these frequencies and substantial discrimination between...

Briefs: Materials
Modeling Transmission Effects on Multilayer Insulation

Recent experimental results within the NASA community have shown apparent degradation in the performance of multilayer insulation (MLI) when used in low-temperature applications, e.g., in liquid hydrogen tanks. There was speculation that this degradation was due to the appearance of...

Briefs: Information Technology
JWST IV&V Simulation and Test (JIST) RT Logic T501 Emulator

In order to develop a software-only test environment for the James Webb Space Telescope (JWST) mission, a solution was needed to send commands and receive telemetry between the TCTS (Telemetry and Command Test Set) and CMM-S card. The as-is solution requires the utilization of...

Briefs: Test & Measurement

A new type of projection schlieren camera system (schlierenscope) is more portable, easier to align, and more versatile than existing systems. The schlierenscope is a projection focusing...

Briefs: Test & Measurement
Cryogenic and Non-Cryogenic Optical Liquid Level Instrument for Stratified Conditions

Typical cryogenic tank metering systems use a series of thermocouple, RTD, or other temperature or resistive devices in a rake or array configurations. Since these operate using the thermal change between the liquid and gas fluid phases, they are limited by...

Briefs: Medical

The disclosed device provides key elements to enabling compact exercise machines that overcome many of the disadvantages of the current spacesuit, as well as medical prosthetics...

Articles: Automotive
Steve Arnold
Engine Systems Innovations, Inc.
Rancho Palos Verdes, CA

Passenger car engines are sized to produce very high horsepower to suit the...

Products: Lighting

DELO (Windach, Germany) now offers a new, high-intensity LED spot lamp with a wavelength of 400 nm. The DELOLUX 50 allows for fast, reliable, pinpoint curing of adhesive layers with thicknesses up to 10 mm, making it suitable...

Briefs: Mechanical & Fluid Systems
Powder Handling Device for Analytical Instruments

A new technology provides for automated sample handling and movement of coarse-grained powder or other solid materials to enable analysis by a robotic or totally automated computer system. Currently, many analytical instruments require a powder sample to control the shape and/or volume of the...

Briefs: Mechanical & Fluid Systems

Very few industries are as affected by strict test standards as the automotive sector. Nearly every automobile component (engine parts, accelerators, clutches,...

Briefs: Electronics & Computers

An acoustic modem that uses a separate phased-array transmitter and receiver has been conceived that allows the communication of high-frequency acoustic waves...

Briefs: Information Technology
Non-Binary Protograph-Based LDPC Codes for Short Block Lengths

Short block codes are in demand by international space agencies for transmission of command and control data to spacecraft in the uplink channel. Codes that outperform currently used binary codes with the same block lengths and code rates are desirable. A design method constructs...