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  • Earth Resources and Remote Sensing  (1,434)
  • Computer Programming and Software  (1,145)
  • Fisheries
  • 2000-2004  (2,606)
Collection
Keywords
Publisher
Years
Year
  • 1
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    [New Retrieval Algorithms for Geophysical Products from GLI and MODIS Data] (2004)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Below is the 1st year progress report for NAG5-13435 "New Retrieval Algorithms for Geophysical Products from GLI and MODIS Data". Activity on this project has been coordinated with our NASA DB project NAG5-9604. For your convenience, this report has six sections and an Appendix. Sections I - III discuss specific activities undertaken during the past year to analyze/use MODIS data. Section IV formally states our intention to no longer pursue any research using JAXA's (formerly NASDA's) GLI instrument which catastrophically failed very early after launch (also see the Appendix). Section V provides some indications of directions for second year activities based on our January 2004 telephone discussions and email exchanges. A brief summary is given in Section VI.
    Keywords: Earth Resources and Remote Sensing
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Meshing, Visualization, and Computational Environments (2004)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: There was probably no higher profile application of meshing, visualization, and computational software this past year than that performed in support of the space shuttle's Return to Flight activities. After heavy use of simulation during the accident investigation, these same tools are now helping address safety and operational issues. In turn, these applications are raising the bar for computational tools in terms of simulation fidelity and turnaround time.
    Keywords: Computer Programming and Software
    Type: Aerospace America; 42; 12; 75
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    The Lunar L1 Gateway Concept: Supporting Future Major Space Science Facilities (2004)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: We report here on a series of ongoing studies to evaluate alternative architectures for future space science facilities and how robots, humans, and autonomous systems might be optimally used to support them. This presentation outlines one scenario -- a "Gateway" at the Earth-Moon L1 point for supporting multiple options beyond Low Earth Orbit -- plus our process for evaluating human/robotic activities to construct telescopes.
    Keywords: Computer Programming and Software
    Type: New Concepts for Far-Infrared and Submillimeter Space Astronomy; 259-263; NASA/CP-2003-212233
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Software Past, Present, and Future: Views from Government, Industry and Academia (2000)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Views from the NASA CIO NASA Software Engineering Workshop on software development from the past, present, and future are presented. The topics include: 1) Software Past; 2) Software Present; 3) NASA's Largest Software Challenges; 4) 8330 Software Projects in Industry Standish Groups 1994 Report; 5) Software Future; 6) Capability Maturity Model (CMM): Software Engineering Institute (SEI) levels; 7) System Engineering Quality Also Part of the Problem; 8) University Environment Trends Will Increase the Problem in Software Engineering; and 9) NASA Software Engineering Goals.
    Keywords: Computer Programming and Software
    Type: Proceedings of the Twenty-Fourth Annual Software Engineering Workshop; NASA/CP-2000-209890
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Earth Observations (2000)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: This document is concentrates on a couple of the missions where the Spacelab hardware was used to do Earth science. The Atmospheric Laboratory for Applications and Science (ATLAS) series of missions and the Lidar in-Space Technology Experiment (LITE) mission, the ATLAS being a series of three Shuttle missions that were very much Spacelab missions, are described. A little bit about the history, what the missions were, some of the instruments that were on them, and results are given.
    Keywords: Earth Resources and Remote Sensing
    Type: The Spacelab Accomplishments Forum; 67-90; NASA/CP-2000-210332
    Format: text
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  • 6
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    Hard Real-Time: C++ Versus RTSJ (2004)
    In:  Other Sources
    Details
    Publication Date: 2019-08-26
    Description: In the domain of hard real-time systems, which language is better: C++ or the Real-Time Specification for Java (RTSJ)? Although ordinary Java provides a more productive programming environment than C++ due to its automatic memory management, that benefit does not apply to RTSJ when using NoHeapRealtimeThread and non-heap memory areas. As a result, RTSJ programmers must manage non-heap memory explicitly. While that's not a deterrent for veteran real-time programmers-where explicit memory management is common-the lack of certain language features in RTSJ (and Java) makes that manual memory management harder to accomplish safely than in C++. This paper illustrates the problem for practitioners in the context of moving data and managing memory in a real-time producer/consumer pattern. The relative ease of implementation and safety of the C++ programming model suggests that RTSJ has a struggle ahead in the domain of hard real-time applications, despite its other attractive features.
    Keywords: Computer Programming and Software
    Type: 19th Annual ACM Conference on Object-Oriented Programming, Systems, Languages, and Applications; Oct 24, 2004 - Oct 28, 2004; Vancouver, British Columbia; Canada
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Assessment of AVIRIS Laboratory and In-Flight Uniformity (2004)
    In:  Other Sources
    Details
    Publication Date: 2019-08-26
    Description: An assessment of the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) laboratory and in-flight uniformity is presented in this Slide presentation. The ideal uniform system is described, being a system where every spectrum is intercomparable to every other spectrum. Two types of failures to achieve this uniformity are described. Graphs showing measured spectral upwelling radiance, the expanded spectral convolution, the radiometric error from spectral error, the results from the hyperion Arizaro calibration experiment and a AVIRIS cross-track uniformity are among those presented. The reasons why uniformity matters are presented.
    Keywords: Earth Resources and Remote Sensing
    Type: AVIRIS Workshop; May 24, 2005 - May 27, 2005; California; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    The HiVY Tool Set (2004)
    In:  Other Sources
    Details
    Publication Date: 2019-08-26
    Description: Our aim is to validate mission-specific components of spacecraft flight software designs that are specified using state-charts and translated automatically to the final flight code for the mission. We established an automatic translation tool set from state-charts to SPIN for the validation of such mission-specific components. To guarantee compliance with autogenerated flight code, our translation tool set preserves the StateFlow@ semantics. We are now able to specify and validate portions of mission-critical software design and implementation using the exhaustive exploration techniques of model checking.
    Keywords: Computer Programming and Software
    Type: 16th International Computer Aided Verification Conference (CAV 2004); Jul 13, 2004 - Jul 17, 2004; Boston, MA; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Using Multiple Space Assests with In-Situ Measurements to Track Flooding in Thailand (2001)
    In:  Other Sources
    Details
    Publication Date: 2019-08-26
    Description: Increasing numbers of space assets can enable coordinated measurements of flooding phenomena to enhance tracking of extreme events. We describe the use of space and ground measurements to target further measurements as part of a flood monitoring system in Thailand. We utilize rapidly delivered MODIS data to detect major areas of flooding and the target the Earth Observing One Advanced Land Imager sensor to acquire higher spatial resolution data. Automatic surface water extent mapping products delivered to interested parties. We are also working to extend our network to include in-situ sensing networks and additional space assets.
    Keywords: Earth Resources and Remote Sensing
    Type: 34th International Symposium on Remote Sensing of Environment; Apr 10, 2011 - Apr 15, 2011; Sydney; Australia
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Method for distributed object communications based on dynamically acquired and assembled software components (2002)
    In:  CASI
    Details
    Publication Date: 2019-08-17
    Description: A method for acquiring and assembling software components at execution time into a client program, where the components may be acquired from remote networked servers is disclosed. The acquired components are assembled according to knowledge represented within one or more acquired mediating components. A mediating component implements knowledge of an object model. A mediating component uses its implemented object model knowledge, acquired component class information and polymorphism to assemble components into an interacting program at execution time. The interactions or abstract relationships between components in the object model may be implemented by the mediating component as direct invocations or indirect events or software bus exchanges. The acquired components may establish communications with remote servers. The acquired components may also present a user interface representing data to be exchanged with the remote servers. The mediating components may be assembled into layers, allowing arbitrarily complex programs to be constructed at execution time.
    Keywords: Computer Programming and Software
    Format: application/pdf
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