skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Compact earth stations, hubs for energy industry expanding

Abstract

That paper reports that advances in gallium arsenide (GaAs) technology, monolithic microwave integrated circuits (MMIC) and large scale integrated (VLSF) circuits, have contributed to the mass production of very reliable small aperture terminals (VSATs). Less publicized, but equally important to multinational energy organizations, are recent developments in compact earth station design and solid-state hubs for VSAT networks made possible by the new technology. Many applications are suited for the energy industry that involve compact earth station terminals and hubs. The first group of applications describes the use of GTE's ACES earth station for the Zaire Gulf Oil Co. in Zaire and for AMOCO in Trinidad. The second group of applications describes the compact hub for VSAT networks, which could potentially have a number of data communication uses in the energy industry, such as, IBM/SNA, X.25, or supervisory control an data acquisition (SCADA) applications.

Authors:
 [1]
  1. (Telecommunications Systems and Analysis, GTE Spacenet Corp., McLean, VA (US))
Publication Date:
OSTI Identifier:
5603216
Resource Type:
Journal Article
Resource Relation:
Journal Name: Pipe Line Industry; (United States); Journal Volume: 75:2
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; GALLIUM ARSENIDES; TECHNOLOGY UTILIZATION; INTEGRATED CIRCUITS; PETROLEUM INDUSTRY; COMPUTERIZED CONTROL SYSTEMS; DATA ACQUISITION SYSTEMS; DATA PROCESSING; AUTOMATION; ARSENIC COMPOUNDS; ARSENIDES; CONTROL SYSTEMS; ELECTRONIC CIRCUITS; GALLIUM COMPOUNDS; INDUSTRY; MICROELECTRONIC CIRCUITS; ON-LINE CONTROL SYSTEMS; ON-LINE SYSTEMS; PNICTIDES; PROCESSING 022000* -- Petroleum-- Transport, Handling, & Storage; 990200 -- Mathematics & Computers; 990300 -- Information Handling

Citation Formats

Shimabukuro, T. Compact earth stations, hubs for energy industry expanding. United States: N. p., 1992. Web.
Shimabukuro, T. Compact earth stations, hubs for energy industry expanding. United States.
Shimabukuro, T. 1992. "Compact earth stations, hubs for energy industry expanding". United States. doi:.
@article{osti_5603216,
title = {Compact earth stations, hubs for energy industry expanding},
author = {Shimabukuro, T.},
abstractNote = {That paper reports that advances in gallium arsenide (GaAs) technology, monolithic microwave integrated circuits (MMIC) and large scale integrated (VLSF) circuits, have contributed to the mass production of very reliable small aperture terminals (VSATs). Less publicized, but equally important to multinational energy organizations, are recent developments in compact earth station design and solid-state hubs for VSAT networks made possible by the new technology. Many applications are suited for the energy industry that involve compact earth station terminals and hubs. The first group of applications describes the use of GTE's ACES earth station for the Zaire Gulf Oil Co. in Zaire and for AMOCO in Trinidad. The second group of applications describes the compact hub for VSAT networks, which could potentially have a number of data communication uses in the energy industry, such as, IBM/SNA, X.25, or supervisory control an data acquisition (SCADA) applications.},
doi = {},
journal = {Pipe Line Industry; (United States)},
number = ,
volume = 75:2,
place = {United States},
year = 1992,
month = 2
}
  • The effect of young expanding compact H II regions upon their molecular environments are studied, emphasizing the simultaneous evolution of the molecular hydrogen dissociation front and the shocked shell of gas surrounding the nebula. For H II regions powered by 05 stars embedded in molecular clouds of ambient density 10/sup 3/-10/sup 4/ cm/sup -3/ the dissociation wave initially travels outward much more rapidly than the shock, but later decelerates and is swept up by the shock about 10/sup 5/ yr after the expansion begins. The 21 cm line of atomic hydrogen will be optically thick in both the preshock andmore » postshock gas for most of this period. The most important coolant transitions are the (O I) 63 ..mu..m line and, for t> or approx. =10/sup 5/ yr, the rotational transitions of H/sub 2/ and/or the rotational transitions of CO. The vibrational transitions of H/sub 2/ are excited predominantly by ultraviolet pumping. We estimate the preshock and postshock carbon recombination-line emission measures.« less
  • New boundary conditions are imposed on the familiar cylindrical gravitational wave vacuum spacetimes. The new spacetime family represents cylindrical waves in a flat expanding (Kasner) universe. Space sections are flat and nonconical where the waves have not reached and wave amplitudes fall off more rapidly than they do in Einstein-Rosen solutions, permitting a more regular null inifinity.
  • We present high angular and spectral resolution H I 21 cm line observations toward the cometary-shaped compact H II region G213.880-11.837 in the GGD 14 complex. The kinematics and morphology of the photodissociated region, traced by the H I line emission, reveal that the neutral gas is part of an expanding flow. The kinematics of the H I gas along the major axis of G213.880-11.837 shows that the emission is very extended toward the SE direction, reaching local standard of rest (LSR) radial velocities in the tail of about 14 km s{sup -1}. The ambient LSR radial velocity of themore » molecular gas is 11.5 km s{sup -1}, which suggests a champagne flow of the H I gas. This is the second (after G111.61+0.37) cometary H II/H I region known.« less
  • The results of numerical simulation of acousto-optic (AO) tunable filters of a new type based on multireflection beam expanding in waveguide structures are discussed. Planar waveguide filters based on thin chalcogenide (As{sub 2}S{sub 3}) films of lithium niobate (LiNbO{sub 3}) are considered. The operation of filters is analysed by the finite-difference time-domain (FDTD) method by using the license FullWAVE software package (RSoft Design Group, Inc.). It is shown that AO filters have very good dispersion properties and AO filters of extremely small size provide a narrow filtration line within the tuning range of more than 100 nm (at a wavelengthmore » of 1.54 {mu}m). It is important that the normalised linewidth (measured in units of the reciprocal filter length) is an order of magnitude smaller than the theoretical limit for AO filters produced from the same material in the conventional way, without the use of multireflection beam expanding. (acoustooptics)« less