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, Software, Satellites



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, Electronics & Computers, Software, Data management


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, Electronics & Computers, Software, Computer software and hardware, Test equipment and instrumentation, Spacecraft


Anomaly Detection in Large Sets of High-Dimensional Symbol Sequences (sequenceMiner)

Ames Research Center, Moffett Field, California SequenceMiner was developed to address the problem of detecting and describing anomalies in large sets of high-dimensional symbol sequences. sequenceMiner works by performing unsupervised clustering (grouping) of sequences using the normalized longest common subsequence (LCS) as a similarity measure, followed by a detailed analysis of outliers to detect anomalies. sequenceMiner utilizes a new hybrid algorithm for computing the LCS that has been shown to outperform existing algorithms by a factor of five. sequenceMiner also includes new algorithms for outlier analysis that provide comprehensible indicators as to why a particular sequence was deemed to be an outlier. This provides analysts with a coherent description of the anomalies identified in the sequence, and why they differ from more normal sequences.

Posted in: Briefs, Electronics & Computers, Software, Mathematical models


Time-Scaled Activity Diagram Simulator

NASA’s Jet Propulsion Laboratory, Pasadena, California The Time-Scaled Activity Diagram Simulator software simulates and animates time-tagged events as an overlay on activity and internal block diagrams in MagicDraw as a plugin application. “Events” are quite generic and include atomic actions, compound actions, signal and message exchanges, invocations, and more. Events are specified in a schedule in a text file, which is ingested by the plug-in application. Concurrent and synchronized execution specified in the event schedule is illustrated within and across diagrams. Events correspond to nodes and edges of hierarchical activity models and corresponding structural decomposition. This software can be used to visually communicate the execution and timeline of any collection of scheduled events, including business, software, and spacecraft processes and procedures, and is applicable to most if not all missions.

Posted in: Briefs, Electronics & Computers, Software, Simulation and modeling, Computer software and hardware


General-Use Nodal Network Solver (GUNNS)

GUNNS is a flow system modeling software package that combines nodal analysis and the hydraulic-electric analogy to simulate fluid, electrical, and thermal systems. Lyndon B. Johnson Space Center, Houston, Texas Crewed space vehicle training has always required highfidelity models of vehicle systems. Many of these systems, particularly of the “flow” variety, benefit from modeling the system as a whole, rather than relying only on the interactions between individual components. In general, system properties (temperatures, voltages, flow rates, etc.) are modeled both internal to and between physical components (valves, batteries, etc.). Lacking knowledge of the system atlarge, integration of flows between individual components is extremely difficult without incurring model instability and errors. The same analogous problem applies among fluid, thermal, and electrical systems. Nodal analysis is a method commonly used in industry to avoid this problem by representing these systems as a simultaneous system of equations.

Posted in: Briefs, TSP, Electronics & Computers, Software, Simulation and modeling, Education, Education and training


Modularized SIR-to-NetCDF Conversion Command-Line Tool

NASA’s Jet Propulsion Laboratory, Pasadena, California This innovation reads in a proprietary formatted binary data format known as Scatterometer Image Reconstruction (SIR), and converts these data files to netCDF-classic format. This software is provided as a command-line tool for Linux/UNIX-based systems, and includes built-in regression testing and command line options. The software is configured to output the netCDF files using a metadata conformance to Attribute Convention for Dataset Discovery (ACDD) and Climate and Forecasting (CF) version 1.6. This software is initially tested and designed for SIR files created for datasets originating from QuikSCAT and SeaWinds on ADEOS-II.

Posted in: Briefs, Electronics & Computers, Software, Computer software and hardware, Imaging and visualization


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