Electrical/Electronics

Automated Break-Out Box for Use with Low-Cost Spacecraft Integration and Test

Goddard Space Flight Center, Greenbelt, Maryland Electrical checkout and testing is a critical part of the overall space integration and test flow. Verifying proper harness and connector signal interfaces is key to ensuring component health and overall system functionality. Break-out boxes (BOBs) are used to give test personnel access to electrical signals for probing, voltage injection, isolation checks, safe-to-mate checks, and voltage/current measurements, and comparing to expected results. Currently, this involves manually attaching multimeters and oscilloscopes to banana jacks on the BOB, taking measurements, and comparing to expected results.

Posted in: Briefs, TSP, Electronic Components

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Radiation-Hardened 10BASE-T Ethernet Physical Interface (PHY)

Goddard Space Flight Center, Greenbelt, Maryland 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 data node. The requirement for ELC was to support a full receive version of the interface, and only to provide a link pulse to the attached payloads on the transmit side of the interface. Further development required a full duplex version of a radiation-hardened 10BASE-T Ethernet interface to support the SpaceCube program.

Posted in: Briefs, TSP, Electronic Components

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Radiation-Hardened, Quad 12-Bit Digital-to-Analog Converter ASIC

This circuit incorporates science-driven features based on applications in a realistic space environment. Goddard Space Flight Center, Greenbelt, Maryland This radiation-hardened, compact, low-power, quad 12-bit digital-to-analog converter (DAC) application specific integrated circuit (ASIC) incorporates science-driven features based on applications in a realistic space environment such as threshold setting, current bias circuits, and general-purpose DC voltage generation. It is based on a previous 10-bit DAC that exhibited excellent test results, presenting the possibility of a 12-bit design.

Posted in: Briefs, TSP, Electronic Components

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Automated Generation of Failure Modes and Effects Document from a Simple SysML Model

NASA’s Jet Propulsion Laboratory, Pasadena, California This software queries a model of system in the MagicDraw program and uses that information to create an Excel spreadsheet that represents a basic FMEA (Failure Modes and Effects Analysis). It automates the generation of an FMEA; the user only has to open MagicDraw, then run this plugin to produce an Excel spreadsheet.

Posted in: Briefs, TSP, Electronic Components

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Space Network Access System (SNAS)

Goddard Space Flight Center, Greenbelt, Maryland SNAS is a single, universally accessible, standards-based, full-featured customer interface for performing Tracking and Data Relay Satellite System (TDRSS) planning, scheduling, and real-time service monitoring and control. It consolidates functionality of multiple legacy customer interface systems into a single system, and is the primary access system for managing TDRSS resources.

Posted in: Briefs, TSP, Electronic Components

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NASA App

Ames Research Center, Moffett Field, California The NASA App showcases a huge collection of the latest NASA content in a mobile optimized format, including images, videos on-demand, NASA Television, mission information, news and feature stories, tweets, ISS sighting opportunities, satellite tracking, Third Rock Radio, featured educational content, and much more for iOS and Android devices.

Posted in: Briefs

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Program to Categorize and Count Observations Performed by the Mars Reconnaissance Orbiter

NASA’s Jet Propulsion Laboratory, Pasadena, California CreateMEPReport.pl software is designed to read through a description of observations scheduled to be taken by the instruments onboard the Mars Reconnaissance Orbiter (MRO) spacecraft to categorize the observations, and then present totals for the categories by instrument. Previously, this function was done in a spreadsheet, but this was prone to error and was extremely complicated.

Posted in: Briefs

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