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  • 1
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    High accuracy autonomous navigation using the global positioning system (GPS) (1997)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Description: The application of global positioning system (GPS) technology to the improvement of the accuracy and economy of spacecraft navigation, is reported. High-accuracy autonomous navigation algorithms are currently being qualified in conjunction with the GPS attitude determination flyer (GADFLY) experiment for the small satellite technology initiative Lewis spacecraft. Preflight performance assessments indicated that these algorithms are able to provide a real time total position accuracy of better than 10 m and a velocity accuracy of better than 0.01 m/s, with selective availability at typical levels. It is expected that the position accuracy will be increased to 2 m if corrections are provided by the GPS wide area augmentation system.
    Keywords: Aircraft Communications and Navigation
    Type: ; 73-78
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    C++ Coding Standards and Style Guide (2005)
    In:  CASI
    Details
    Publication Date: 2018-06-06
    Description: This document is based on the "C Style Guide" (SEL-94-003). It contains recommendations for C++ implementations that build on, or in some cases replace, the style described in the C style guide. Style guidelines on any topics that are not covered in this document can be found in the "C Style Guide." An attempt has been made to indicate when these recommendations are just guidelines or suggestions versus when they are more strongly encouraged. Using coding standards makes code easier to read and maintain. General principles that maximize the readability and maintainability of C++ are: (1) Organize classes using encapsulation and information hiding techniques. (2) Enhance readability through the use of indentation and blank lines. (3) Add comments to header files to help users of classes. (4) Add comments to implementation files to help maintainers of classes. (5) Create names that are meaningful and readable.
    Keywords: Computer Programming and Software
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Automation Framework for Flight Dynamics Products Generation (2010)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: XFDS provides an easily adaptable automation platform. To date it has been used to support flight dynamics operations. It coordinates the execution of other applications such as Satellite TookKit, FreeFlyer, MATLAB, and Perl code. It provides a mechanism for passing messages among a collection of XFDS processes, and allows sending and receiving of GMSEC messages. A unified and consistent graphical user interface (GUI) is used for the various tools. Its automation configuration is stored in text files, and can be edited either directly or using the GUI.
    Keywords: Computer Programming and Software
    Type: GSC-15618-1 , NASA Tech Briefs, December 2010; 15
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Benchmarking the Collocation Stand-Alone Library and Toolkit (CSALT) (2017)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This paper describes the processes and results of Verification and Validation (V&V) efforts for the Collocation Stand Alone Library and Toolkit (CSALT). We describe the test program and environments, the tools used for independent test data, and comparison results. The V&V effort employs classical problems with known analytic solutions, solutions from other available software tools, and comparisons to benchmarking data available in the public literature. Presenting all test results are beyond the scope of a single paper. Here we present high-level test results for a broad range of problems, and detailed comparisons for selected problems.
    Keywords: Computer Programming and Software; Aeronautics (General)
    Type: GSFC-E-DAA-TN40959 , Nano-Satellite Symposium NSAT; Jun 03, 2017 - Jun 09, 2017; Matsuyama; Japan|International Symposium on Space Flight Dynamics ISSFD; Jun 03, 2017 - Jun 09, 2017; Matsuyama; Japan|International Symposium on Space Technology and Science ISTS; Jun 03, 2017 - Jun 09, 2017; Matsuyama; Japan
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  • 5
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    Benchmarking the Collocation Stand-Alone Library and Toolkit (CSALT) (2017)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This paper describes the processes and results of Verification and Validation (VV) efforts for the Collocation Stand Alone Library and Toolkit (CSALT). We describe the test program and environments, the tools used for independent test data, and comparison results. The VV effort employs classical problems with known analytic solutions, solutions from other available software tools, and comparisons to benchmarking data available in the public literature. Presenting all test results are beyond the scope of a single paper. Here we present high-level test results for a broad range of problems, and detailed comparisons for selected problems.
    Keywords: Aeronautics (General)
    Type: GSFC-E-DAA-TN42768 , International Symposium on Space Flight Dynamics (ISSFD); Jun 03, 2017 - Jun 09, 2017; Maysuyama; Japan
    Format: application/pdf
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