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  • 1
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    Generalized Support Software: Domain Analysis and Implementation (1995)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Description: For the past five years, the Flight Dynamics Division (FDD) at NASA's Goddard Space Flight Center has been carrying out a detailed domain analysis effort and is now beginning to implement Generalized Support Software (GSS) based on this analysis. GSS is part of the larger Flight Dynamics Distributed System (FDDS), and is designed to run under the FDDS User Interface / Executive (UIX). The FDD is transitioning from a mainframe based environment to systems running on engineering workstations. The GSS will be a library of highly reusable components that may be configured within the standard FDDS architecture to quickly produce low-cost satellite ground support systems. The estimates for the first release is that this library will contain approximately 200,000 lines of code. The main driver for developing generalized software is development cost and schedule improvement. The goal is to ultimately have at least 80 percent of all software required for a spacecraft mission (within the domain supported by the GSS) to be configured from the generalized components.
    Keywords: Computer Programming and Software
    Type: Software Engineering Laboratory Series: Collected Software Engineering Papers; Volume 13; 5-3-5-8; NASA/TM-1998-208615/VOL13
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    The Impact of Ada and Object-Oriented Design in NASA Goddard's Flight Dynamics Division (1996)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Description: This paper presents the highlights and key findings of 10 years of use and study of Ada and object-oriented design in NASA Goddard's Flight Dynamics Division (FDD). In 1985, the Software Engineering Laboratory (SEL) began investigating how the Ada language might apply to FDD software development projects. Although they began cautiously using Ada on only a few pilot projects, they expected that, if the Ada pilots showed promising results, the FDD would fully transition its entire development organization from FORTRAN to Ada within 10 years. However, 10 years later, the FDD still produced 80 percent of its software in FORTRAN and had begun using C and C++, despite positive results on Ada projects. This paper presents the final results of a SEL study to quantify the impact of Ada in the FDD, to determine why Ada has not flourished, and to recommend future directions regarding Ada. Project trends in both languages are examined as are external factors and cultural issues that affected the infusion of this technology. The detailed results of this study were published in a formal study report in March of 1995. This paper supersedes the preliminary results of this study that were presented at the Eighteenth Annual Software Engineering Workshop in 1993.
    Keywords: Computer Programming and Software
    Type: Software Engineering Laboratory Series: Collected Software Engineering Papers; Volume 14; NASA/TM-1998-208613
    Format: text
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  • 3
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    The Generalized Support Software (GSS) Domain Engineering Process: An Object-Oriented Implementation and Reuse Success at Goddard Space Flight Center (1997)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Description: The Flight Dynamics Division (FDD) of NASA's Goddard Space Flight Center (GSFC) recently embarked on a far-reaching revision of its process for developing and maintaining satellite support software. The new process relies on an object-oriented software development method supported by a domain specific library of generalized components. This Generalized Support Software (GSS) Domain Engineering Process is currently in use at the NASA GSFC Software Engineering Laboratory (SEL). The key facets of the GSS process are (1) an architecture for rapid deployment of FDD applications, (2) a reuse asset library for FDD classes, and (3) a paradigm shift from developing software to configuring software for mission support. This paper describes the GSS architecture and process, results of fielding the first applications, lessons learned, and future directions
    Keywords: Computer Programming and Software
    Type: Software Engineering Laboratory Series: Collected Software Engineering Papers; Volume 15; 189-195; NASA/TM-1998-208614/VOL15
    Format: text
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  • 4
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    Using AppletMagic(tm) to Implement an Orbit Propagator: New Life for Ada Objects (1997)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Description: This paper will discuss the use of the Intermetrics AppletMagic tool to build an applet to display a satellite ground track on a world map. This applet is the result of a prototype project that was developed by the Goddard Space Flight Center's Flight Dynamics Division (FDD), starting in June of 1996. Both Version 1 and Version 2 of this applet can be accessed via the URL http://fdd.gsfc.nasa.gov/Java.html. This paper covers Version 1, as Version 2 did not make radical changes to the Ada part of the applet. This paper will briefly describe the design of the applet, discuss the issues that arose during development, and will conclude with lessons learned and future plans for the FDD's use of Ada and Java. The purpose of this paper is to show examples of a successful project using Oi AppletMagic, and to highlight some of the pitfalls that occurred along the way. It is hoped that this discussion will be useful both to users of AppletMagic and to organizations such as Intermetrics that develop new technology.
    Keywords: Computer Programming and Software
    Type: Software Engineering Laboratory Series: Collected Software Engineering Papers; Volume 15; 173-188; NASA/TM-1998-208614/VOL15
    Format: text
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  • 5
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    2nd GSFC-JPL Quality Mission Workshop Report (2000)
    In:  Other Sources
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    Publication Date: 2018-06-08
    Description: The 2nd GSFC-JPL QMSW workshop brought together 56 participants mostly from GSFC and JPL to focus on critical challenges for mission software.
    Keywords: Computer Programming and Software
    Type: Quality Mission Software (QMSW) Workshop; Fallbrook, CA; United States
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  • 6
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    A Matrix Approach to Software Process Definition (2000)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Software Engineering Laboratory (SEL) is currently engaged in a Methodology and Metrics program for the Information Systems Center (ISC) at Goddard Space Flight Center (GSFC). This paper addresses the Methodology portion of the program. The purpose of the Methodology effort is to assist a software team lead in selecting and tailoring a software development or maintenance process for a specific GSFC project. It is intended that this process will also be compliant with both ISO 9001 and the Software Engineering Institute's Capability Maturity Model (CMM). Under the Methodology program, we have defined four standard ISO-compliant software processes for the ISC, and three tailoring criteria that team leads can use to categorize their projects. The team lead would select a process and appropriate tailoring factors, from which a software process tailored to the specific project could be generated. Our objective in the Methodology program is to present software process information in a structured fashion, to make it easy for a team lead to characterize the type of software engineering to be performed, and to apply tailoring parameters to search for an appropriate software process description. This will enable the team lead to follow a proven, effective software process and also satisfy NASA's requirement for compliance with ISO 9001 and the anticipated requirement for CMM assessment. This work is also intended to support the deployment of sound software processes across the ISC.
    Keywords: Computer Programming and Software
    Type: SEW Paper-111400 , Software Engineering; Nov 29, 2000 - Nov 30, 2000; Greenbelt, MD; United States
    Format: application/pdf
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  • 7
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    Autonomous Image Processing Algorithms Locate Region-of-Interests: The Mars Rover Application (1998)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: In this report, we demonstrate that bottom-up IPA's, image-processing algorithms, can perform a new visual task to select and locate Regions-Of-Interests (ROIs). This task has been defined on the basis of a theory of top-down human vision, the scanpath theory. Further, using measures, Sp and Ss, the similarity of location and ordering, respectively, developed over the years in studying human perception and the active looking role of eye movements, we could quantify the efficient and efficacious manner that IPAs can imitate human vision in located ROIS. The means to quantitatively evaluate IPA performance has been an important part of our study. In fact, these measures were essential in choosing from the initial wide variety of IPAS, that particular one that best serves for a type of picture and for a required task. It should be emphasized that the selection of efficient IPAs has depended upon their correlation with actual human chosen ROIs for the same type of picture and for the same required task accomplishment.
    Keywords: Computer Programming and Software
    Type: NASA/CR-1998-208289 , NAS 1.26:208289 , UCB/ERL-M98/8
    Format: application/pdf
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  • 8
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    Baselining the New GSFC Information Systems Center: The Foundation for Verifiable Software Process Improvement (1999)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: This paper describes a study performed at the Information System Center (ISC) in NASA Goddard Space Flight Center. The ISC was set up in 1998 as a core competence center in information technology. The study aims at characterizing people, processes and products of the new center, to provide a basis for proposing improvement actions and comparing the center before and after these actions have been performed. The paper presents the ISC, goals and methods of the study, results and suggestions for improvement, through the branch-level portion of this baselining effort.
    Keywords: Computer Programming and Software
    Type: Proceedings of the Twenty-Third Annual Software Engineering Workshop; NASA/CP-1999-209236
    Format: text
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  • 9
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    Evaluation of Two Fractal Methods for Magnetogram Image Analysis (1997)
    In:  Other Sources
    Details
    Publication Date: 2019-07-17
    Description: Fractal and multifractal techniques have been applied to various types of solar data to study the fractal properties of sunspots as well as the distribution of photospheric magnetic fields and the role of random motions on the solar surface in this distribution. Other research includes the investigation of changes in the fractal dimension as an indicator for solar flares. Here we evaluate the efficacy of two methods for determining the fractal dimension of an image data set: the Differential Box Counting scheme and a new method, the Jaenisch scheme. To determine the sensitivity of the techniques to changes in image complexity, various types of constructed images are analyzed. In addition, we apply this method to solar magnetogram data from Marshall Space Flight Centers vector magnetograph.
    Keywords: Computer Programming and Software
    Type: Solar Physics; 174; 297-309
    Format: text
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