Comment on 'Sunday decreases in magnetospheric VLF wave activity' by C. G. Park and T. R. Miller
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Thorne, R. M.↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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The Nimbus satellite system: Remote sensing R&D platform of the 70's
Originally conceived to be the future operational weather satellite, the Nimbus series of seven satellites became the work horse and experimental backbone of the NASA/NOAA space research program. Early problems in developing the attitude control system and proving its operational characteristics in the simulated space environment are discussed. The program proved itself many times over; contributing substantially to the scientific knowledge of atmospherics and weather. As application/research vehicles, the seven Nimbus spacecraft were used for the development, test and application of a variety of new and advanced meteorological and geophysical remote sensing instruments and associated data transmission and processing techniques.
Haas, I. S.↗
The ultraviolet spectra of R and N type stars
Low dispersion long wave radiation spectra of three early N-type carbon stars (BL Orionis, TX Piscium and T Indi) obtained with the IUE are discussed. N-star spectra were compared with IUE observations of late M-type stars and several differences were noted. The Mg II and C II chromospheric emission lines reported are the first convincing detection of a 10,000-20,000 K chromosphere in the N stars.
Obrien, G. T.↗
Solar wind motion within 30 R solar masses - Spacecraft radio scintillation observations
New remote-sensing observations are reported of the solar wind motion within about 30 earth radii. Use is made of the interplanetary scintillation (IPS) spaced receiver technique with the radio source being a spacecraft signal (rather than a natural radio source as in previous spaced receiver studies). The spacecraft used are Helios A and B and the Viking orbiters. The purposes of the study are (1) to augment the scarce estimates of solar wind bulk flow speed near the sun and in the ecliptic with measurements made using spacecraft signals, and (2) to estimate random velocity components and identify the region where the random velocity is a significant fraction of the mean velocity. In addition, the radial evolution of speed and random velocity is compared with that of the plasma density fluctuation spectrum. Also reported are the first accurately normalized IPS scintillation index measurements using a monochromatic point source.
Armstrong, J. W.↗
The Nimbus Satellite System - Remote sensing R&D platform of the 70's
In surveying the Nimbus series, attention is given to the early problems encountered in developing the Attitude Control System and in proving its operational characteristics in a simulated space environment. A table summarizing the experiments carried out with Nimbus satellites is included. Data from the Nimbus satellites are being used in oceanography, hydrology, geology, geomorphology, geography, cartography, agriculture, and meteorology.
Haas, I. S.↗
Evidence for a distant /greater than 8,700 R sub J/ Jovian magnetotail - Voyager 2 observations
(Previously announced in STAR as N82-18106)
Lepping, R. P.↗
The man-vehicle systems research facility - A new NASA aeronautical R & D facility
A new flight simulation facility nearing completion at the NASA Ames Research Center is described. The facility is intended to support aeronautical human factors research and consists of a new building, two full mission flight simulators and an air traffic control simulator. Special features of the new facility are described which make it particularly well suited for human factors research.
Nagel, D. C.↗
Comment on 'Hy-wire measurements of atmospheric potential' by R. H. Holzworth
It is shown that the Hy-wire fluctuations in atmospheric potential measured by Holzworth (1983) were not changes in the global circuit. The close association between the Hy-wire potential variations and meteorological changes, as well as the lack of correlation between the potential and the Carnegie curve, indicates that the tethered balloon measurements were responding to local meteorological factors. The abnormally high potentials and the reversed curvature of the potential profiles suggest that the Hy-wire apparatus was not measuring atmospheric potentials accurately.
Markson, R.↗
Use of the R-matrix propagation technique to calculate the electronic energy levels of aperiodic structures - Application to an AlAs/GaAs quasiperiodic superlattice
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Vasquez, R. P.↗
The outer atmospheres of the coolest M giants - Ultraviolet spectra of Rho Persei, 2 Centauri, g Herculis, Theta Apodis, and R Lyrae
New IUE observations of five M giants cooler than most studied previously have been obtained in order to study the variation of chromospheric properties with effective temperature. The ultraviolet spectrum lines of one of these stars, Rho Persei, are identified. The properties of the spectra of of the five stars are examined in detail, including the line widths and turbulence, the radial velocities of groups of lines, the structure in the Mg II resonance lines, and the fluorescent lines. The physical properties of the M giants' chromospheres are considered, including the formation of Fe II, the electron density, the degree of ionization of iron, magnesium, silicon, and carbon, the hydrogen ionization and energy balance, and the creation and destruction of photons.
Eaton, Joel A.↗
The USL NASA PC R and D development environment standards
The development environment standards which have been established in order to control usage of the IBM PC/XT development systems and to prevent interference between projects being currently developed on the PC's are discussed. The standards address the following areas: scheduling PC resources; login/logout procedures; training; file naming conventions; hard disk organization; diskette care; backup procedures; and copying policies.
Dominick, Wayne D.↗
The USL NASA PC R and D interactive presentation development system
The Interactive Presentation Development System (IPFS) is a highly interactive system for creating, editing, and displaying video presentation sequences, e.g., for developing and presenting displays of instructional material similiar to overhead transparency or slide presentations. However, since this system is PC-based, users (instructors) can step through sequences forward or backward, focusing attention to areas of the display with special cursor pointers. Additionally, screen displays may be dynamically modified during the presentation to show assignments or to answer questions, much like a traditional blackboard. This system is now implemented at the University of Southwestern Louisiana for use within the piloting phases of the NASA contract work.
Dominick, Wayne D.↗
USL/DBMS NASA/PC R and D project C programming standards
A set of programming standards intended to promote reliability, readability, and portability of C programs written for PC research and development projects is established. These standards must be adhered to except where reasons for deviation are clearly identified and approved by the PC team. Any approved deviation from these standards must also be clearly documented in the pertinent source code.
Dominick, Wayne D.↗
USL/DBMS NASA/PC R and D project system design standards
A set of system design standards intended to assure the completeness and quality of designs developed for PC research and development projects is established. The standards presented address the areas of problem definition, initial design plan, design specification, and re-evaluation.
Dominick, Wayne D.↗
USL/DBMS NASA/PC R and D project system testing standards
A set of system testing standards to be used in the development of all C software within the NASA/PC Research and Development Project is established. Testing will be considered in two phases: the program testing phase and the system testing phase. The objective of these standards is to provide guidelines for the planning and conduct of program and software system testing.
Dominick, Wayne D.↗
[NASA/DOD Aerospace Knowledge Diffusion Research Project. Paper 2:] External Information Sources and aerospace R&D: The use and importance of technical reports by US aerospace engineers and scientists
This paper formulates and studies two propositions. Proposition 1 states that information that is external to the aerospace organization tends to be used less than internal sources of information; the more geographically removed the information is from the organization, the less likely it is to be used. Proposition 2 states that of the various sociometric variables assumed to influence the use of an information channel or source, perceived accessibility exerts the greatest influence. Preliminary analysis based on surveys supports Proposition 1. This analysis does not support Proposition 2, however. Evidence here indicates that reliability and relevance influence the use of an information source more than the idea of perceived accessibility.
Blados, Walter R.↗
Solutions to bi-Maxwellian transport equations for radial solar wind beyond 28 R(S)
This paper presents solar wind solutions for radial flow between 28 solar radii and 1 AU using the bi-Maxwellian-based 16-moment set of transport equations. In addition to the number density, drift velocity, and parallel and perpendicular temperatures, the 16-moment equations account for the transport of both longitudinal and transverse thermal energies as well as stress. Also, using the 16-moment approximation for the distribution function and assuming plasma parameter values characteristic of the solar wind, contour plots are generated for the proton velocity distribution function. It is shown how the shape of these plots depends on various macroscopic plasma parameters.
Demars, H. G.↗
Technology R&D for space commerce
The potential effects of reserach conducted by the NASA Office of Aeronautics and Space Technology, OAST, on the aerospace industry are addressed. Program elements aimed at meeting commercial needs and those aimed at meeting NASA needs which have secondary effects benefiting aerospace firms are considered. Particular attention is given to current and future NASA programs for cooperating with industry and the potential effects of OAST research on nonaerospace industries.
Sadin, Stanley R.↗