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    X-Antenna: A graphical interface for antenna analysis codes (1995)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This report serves as the user's manual for the X-Antenna code. X-Antenna is intended to simplify the analysis of antennas by giving the user graphical interfaces in which to enter all relevant antenna and analysis code data. Essentially, X-Antenna creates a Motif interface to the user's antenna analysis codes. A command-file allows new antennas and codes to be added to the application. The menu system and graphical interface screens are created dynamically to conform to the data in the command-file. Antenna data can be saved and retrieved from disk. X-Antenna checks all antenna and code values to ensure they are of the correct type, writes an output file, and runs the appropriate antenna analysis code. Volumetric pattern data may be viewed in 3D space with an external viewer run directly from the application. Currently, X-Antenna includes analysis codes for thin wire antennas (dipoles, loops, and helices), rectangular microstrip antennas, and thin slot antennas.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA-CR-199212 , NAS 1.26:199212 , REPT-722792-8
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    National law enforcement telecommunications network (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Alternative approaches are analyzed to a National Law Enforcement Telecommunications Network (NALECOM) designed to service all state-to-state and state-to-national criminal justice communications traffic needs in the United States. Network topology options were analyzed, and equipment and personnel requirements for each option were defined in accordance with NALECOM functional specifications and design guidelines. Evaluation criteria were developed and applied to each of the options leading to specific conclusions. Detailed treatments of methods for determining traffic requirements, communication line costs, switcher configurations and costs, microwave costs, satellite system configurations and costs, facilities, operations and engineering costs, network delay analysis and network availability analysis are presented. It is concluded that a single regional switcher configuration is the optimum choice based on cost and technical factors. A two-region configuration is competitive. Multiple-region configurations are less competitive due to increasing costs without attending benefits.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA-CR-142543 , SP43-20
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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