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Record Details

Record 78 of 60895
UNIX-BASED DATA MANAGEMENT SYSTEM FOR PROPAGATION EXPERIMENTS
Author and Affiliation:
Kantak, A. V.
Abstract: This collection of programs comprises The UNIX Based Data Management System for the Pilot Field Experiment (PiFEx) which is an attempt to mimic the Mobile Satellite (MSAT) scenario. The major purposes of PiFEx are to define the mobile communications channels and test the workability of new concepts used to design various components of the receiver system. The results of the PiFex experiment are large amounts of raw data which must be accessed according to a researcher's needs. This package provides a system to manage the PiFEx data in an interactive way. The system not only provides the file handling necessary to retrieve the desired data, but also several FORTRAN programs to generate some standard results pertaining to propagation data. This package assumes that the data file initially generated from the experiment has been already converted from binary to ASCII format. The Data Management system described here consists of programs divided into two categories: those programs that handle the PiFEx generated files and those that are used for number-crunching of these files. Five FORTRAN programs and one UNIX shell script file are used for file manipulation purposes. These activities include: calibration of the acquired data; and parsing of the large data file into datasets concerned with different aspects of the experiment such as the specific calibrated propagation data, dynamic and static loop error data, statistical data, and temperature and spatial data on the hardware used in the experiment. The five remaining FORTRAN programs are used to generate usable information about the data. Signal level probability, probability density of the signal fitting the Rician density function, frequency of the data's fade duration, and the Fourier transform of the data can all be generated from these data manipulation programs. In addition, a program is provided which generates a downloadable file from the signal levels and signal phases files for use with the plotting routine AKPLOT (NPO-16931). All programs in this package are written in either FORTRAN-77 or UNIX shell-scripts. The package does not include test data. The programs were developed in 1987 for use with a UNIX operating system on a DEC MicroVAX computer.
Publication Date: Jan 01, 1994
Document ID:
19940003171
(Acquired Dec 28, 1995)
Accession Number: 94M10714
Subject Category: COMMUNICATIONS AND RADAR
Report/Patent Number: NPO-17463
Document Type: Computer Program
Publisher Information: United States
Financial Sponsor: Cal Tech/Jet Propulsion Lab.
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: COMMUNICATION SATELLITES; DATA MANAGEMENT; DATA TRANSMISSION; STATISTICAL ANALYSIS; UNIX (OPERATING SYSTEM)
Other Descriptors: FORTRAN 77(85%), UNIX SHELL SCRIPT(15%); DEC VAX SERIES
Miscellaneous Notes: Approximately 730 source statements
Availability Source: Other Sources
Availability Notes: Program $150.00
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