WorldCat Identities

LOGICON INC LEXINGTON MA

Overview
Works: 15 works in 16 publications in 1 language and 16 library holdings
Publication Timeline
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Most widely held works by LOGICON INC LEXINGTON MA
Analytic Representation of the Jacchia 1977 Model Atmosphere( Book )

1 edition published in 1980 in English and held by 1 WorldCat member library worldwide

Modified Jacchia-Walker temperature profiles are developed to accurately represent the Jacchia 1977 temperature profiles above 125 km. The diffusive equilibrium equations are analytically integrable for these profiles, greatly reducing the need for tabular storage of solutions
Automated Test Case Generator( Book )

1 edition published in 1980 in English and held by 1 WorldCat member library worldwide

This report summarized the results of a study to advance the state-of-the-art in the area of automated software testing. Specific goals were to develop a specification for a system which provides for the automated selection of test cases and the automated generation of test data. The report describes the requirement for such a system and presents a design approach which will fulfill the requirement. Included is a sample software program which is manually carried through the various steps of the proposed system. The report closes with a survey of the state-of-the-art of software testing. (Author)
Analysis and Research for Integrated Systems in Physics of the Atmosphere( Book )

1 edition published in 1977 in English and held by 1 WorldCat member library worldwide

This report describes significant analyses and computer programming problems performed in support of Air Force Geophysics Laboratory scientists. Mathematical and logical procedures are discussed; reference material and samples of results are presented. Various AFGL rapid orbit generation programs have been modified for satellite observation by aircraft, for prediction of longitude drift due to resonances, and for improved estimation of solar eclipsing. Geopotential model studies were conducted to identify significant terms and evaluate results in operational orbit determination programs. Ionospheric research programs include data reduction and analyses for plasma motion and electric field mapping, topside plasma monitoring on a Univac 1110, and scintillations modeling for equatorial and high latitude station coverage. A geographic-geomagnetic background continental outline plot program is also described. Analysis and data processing for the Multi-Spectral Measurement Program includes calibrations and initial flight data base design. A general data compaction routine for use with large data bases is described. A revised astronomical ephemeris program which uses the new JPL planetary system was developed. (Author)
Requirements Standards Study. Volume III. Requirements Engineering Guidebook( Book )

1 edition published in 1979 in English and held by 1 WorldCat member library worldwide

The Requirements Engineering Guidebook provides guidance and standards for government and private engineering personnel in defining and analyzing the requirements for a system. This guidebook addresses the initial phases of Air Force system acquisition (Conceptual and Validation Phases) and is intended to provide gridance for the acquisition of large-scale systems. However, the guidance can be applied to smaller, less complex systems and can be used in acquisition environments other than the Air Force. This document contains the guidelines and standards for requirements engineering and documentation and provides the framework for tailoring the requirements engineering activities to the specific needs of individual programs
Requirements Standards Study. Volume II. Technical Report( Book )

1 edition published in 1979 in English and held by 1 WorldCat member library worldwide

The objectives of the Requirements Standard Study were (1) to define a set of standards for the definition and analysis of the requirement of a system during the initial phases of the acquisition life cycle, and (2) to identify the functional requirements for automated tools intended to support the standard by providing assistance in the definition and analysis of the system requirements and by assuring compliance with the standard
Requirements Standards Study. Volume I. Technical Report Overview( Book )

1 edition published in 1979 in English and held by 1 WorldCat member library worldwide

Military systems acquisition has a highly regulated environment. However, many of the military system engineering management procedures are not appropriate for the complexity of the systems being procured. This volume summarizes the results of a Logicon study for the Air Force in which guidelines and standards for systems requirements definition and analysis have been developed for the initial phases of an Air Force systems acquisition. This volume presents an overview of the Air Force systems acquisition environment and associated requirements engineering problems. This volume briefly discusses the methodology applied during the study and the technical results
Functional and Operational Advances in the AFGL Rocket Trajectory System- I( Book )

1 edition published in 1979 in English and held by 1 WorldCat member library worldwide

The present AFGL Rocket Trajectory System consists of an editor-preprocessor of radar data, a comprehensive multi-functional filtering and trajectory estimation program, a multi-radar estimation program, and a report generator. Several analytical and organizational procedures have been developed to enhance the capabilities of this system. A usage guide, a program guide and appendices describe these advances. (Author)
AIRMICS LARE/CADSAT Analysis( Book )

1 edition published in 1981 in English and held by 1 WorldCat member library worldwide

This study was conducted to determine the applicability of Logicon's Automated Requirements Engineering (LARE) methodology in the Army logistics support environment. Logicon developed LARE to provide a means to define, effectively analyze, and maintain system requirements. LARE includes a coherent set of procedures which allows analysts to define/analyze requirements using computerized tools. The Computer Aided Design and Specification Analysis Tool (CADSAT) was used on this project. CADSAT was designed to aid structured documentation and analysis of large processing systems. This project used the Air Force's standard CADSAT with the CADSAT extensions developed by Logicon
Condensed Storage of Diffusion Equation Solutions for Atmospheric Density Model Computations( Book )

1 edition published in 1980 in English and held by 1 WorldCat member library worldwide

It is shown that all neutral thermospheric component densities in diffusive equilibrium can be derived from a single function of height. This is used to permit considerable savings in storage of Jacchia 1977 model densities compared to storing the solution for each component, which requires use of external random access files. The single solution can be built into the computer code, making it more transportable to different computers. A subroutine has been developed implementing this method, including the latest results for atomic nitrogen and the non-diffusive equilibrium solution for atomic hydrogen
Analysis of the Application of PSL/PSA for Management Information Systems in the USACSC Environment. Volume I( Book )

1 edition published in 1980 in English and held by 1 WorldCat member library worldwide

Based on a general awareness of the effects of inadequacies in requirements definition throughout the life cycle of a system, AIRMICS has initiated a comprehensive program for application of the latest methodologies in requirements analysis to the Army's information system development programs. This report is a review of the implementation problems involved in using a current available automated tool and to identify further research topics which will be used to guide continuing research. (Author)
Requirements Engineering Guidebook. Requirements Engineering Using an Automated Tool: PSL/PSA. Volume II( Book )

1 edition published in 1980 in English and held by 1 WorldCat member library worldwide

Based on a general awareness of the inadequacies in requirements definition throughout the life cycle of a system, AIRMICS has initiated a comprehensive program for application of the latest methodologies in requirements analysis to the Army's information system development programs. This report was prepared to aid requirements analysts who are new to automated requirements analysis in using PSL/PSA by selecting a subset of PSL for initial use and in showing the relationship between the manual method and the automated language support. (Author)
Research, Analysis, Development, and Application of Highly Integrated Systems of Multi-Phases of the Physics of the Upper Atmosphere( Book )

1 edition published in 1978 in English and held by 1 WorldCat member library worldwide

A variety of computer programs is used to fulfill the different requirements, generated by the various research programs, for satellite orbit data. Revisions to these programs are presented which, variously, enlarge the input/output capabilities, improve the accuracy of calculations, or extend the range of problems that can be addressed. Results are presented of investigations of the comparative accuracy of available programs for satellite orbit prediction and solar ephemeris calculation. Occasionally large scale computer codes useful for geophysical analyses, but developed elsewhere, must be adapted to the needs of AFGL research programs and modified for use on the 6600 system. Cases in point are a code for predicting the proton and electron environments in the magnetosphere and another for transforming between geomagnetic and geographical coordinate systems. Modifications to these programs and procedures for their operational usage are presented. Atmospheric density modeling plays an important role in satellite orbit determination. Results are presented for efforts to: incoporate new density models into orbit determination programs; evaluate the performance of different density models in orbit determination applications; and provide methods for model development by applying multiple regression to experimental data
Analysis and Programming for Research in the Physics of the Upper Atmosphere by James N Bass( Book )

2 editions published between 1981 and 1984 in English and held by 1 WorldCat member library worldwide

A versatile density model for the upper atmosphere (DENMOD) has been developed to provide quantitative density data. This software package consolidates recent atmospheric density models for convenient usage. Computations in the Jacchia 1977 Model have been streamlined. Methods are presented for comparative evaluations of various recent atmospheric density models, such as those included in DENMOD, with respect to the precision of satellite position predictions. These comparisons are benchmarked by accurate satellite tracking data obtained from CW Doppler beacon measurements. AFGL ephemerides systems are described which provide efficient calculations of satellite orbits expressed in a variety of forms. The utility of these programs has been expanded by adding the capability for performing ancillary calculations. These include evaluation of occultation conditions and viewing conditions for configurations of multiple observing platforms. With addition of magnetic field models which include field line tracing routines, these software systems can be used to evaluate the time-histories of various types of geomagnetic images (or footprints) of satellites as they traverse their orbits. Improvements have been made in the AFGL Rocket Trajectory System, a software system which provides statistical filtering of radar data for rocket launches. New rocket types have been added to the system's repertoire of thrust models. (Author)
Management Information System for ESD Program Offices( Book )

1 edition published in 1978 in English and held by 1 WorldCat member library worldwide

This report is the result of an initial study effort to identify the management information needs and to define the requirements for an integrated information system within the AF Electronic Systems Division (ESD) acquisition environment. The Management Information System (MIS) functional requirements for the ESD Program Office are defined in terms of the Computer-Aided Design and Specification Tool. The development of the computer data base and a description of the MIS structure is included in the report. This report addresses management areas such as cost/budgeting, scheduling, tracking capabilities, and ECP control
Electric Field Processing System for the S3-2 Satellite( Book )

1 edition published in 1981 in English and held by 1 WorldCat member library worldwide

The Air Force Satellite S3-2 carried on board sensors to measure the intensity of electric fields encountered along its orbit through the ionosphere and magnetosphere. The data which is collected is digitized and stored on magnetic tape. Three software systems are described which access this data, together with supporting information such as satellite ephemeris, the local values of the Earth's magnetic field, and data from other on board sensors. Depending upon the particular system selected, the electric field may undergo various levels of processing. The results are presented as listings and computer plots. (Author)
 
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English (16)