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  • AERODYNAMICS  (3,366)
  • SPACE RADIATION  (2,685)
  • 1975-1979  (2,823)
  • 1970-1974  (3,228)
Collection
Keywords
Years
Year
  • 1
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    Economy of flight at supersonic speeds (1976)
    In:  CASI
    Details
    Publication Date: 2010-11-08
    Description: Prandtl's theory is used to determine the airflow over bodies and wings adapted to supersonic flight. By making use of these results, and by incorporating in them an allowance for the probable skin friction, some estimates of expected lift-drag ratios are made for various flight speeds with the best configuration. At each speed a slender body and wings having the best angle of sweepback are considered. For the range of supersonic speeds shown an airplane of normal density and loading would be required to operate at an altitude of the order of 60,000 feet. The limiting value of 1-1/2 times the speed of sound corresponds to a flight speed of 1000 miles per hour. At this speed about 1.5 miles per gallon of fuel are expected. It is interesting to note that this value corresponds to a value of more than 15 miles per gallon when the weight is reduced to correspond to that of an ordinary automobile.
    Keywords: AERODYNAMICS
    Type: Collected Works of Robert T. Jones; p 499-514
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  • 2
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    Aeroelastic characteristics of an oblique wing (1976)
    In:  CASI
    Details
    Publication Date: 2010-11-08
    Description: In theory, the most efficient wing shape for transonic and low supersonic speeds is simply a long narrow straight subsonic wing turned at an oblique angle to the flight direction. This theory has been verified by tests at Mach numbers from .6 to 1.4 in supersonic wind tunnel and by comparative studies of transonic transport designs.
    Keywords: AERODYNAMICS
    Type: Collected Works of Robert T. Jones; p 867-883
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  • 3
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    Aerodynamic design for supersonic speeds (1976)
    In:  CASI
    Details
    Publication Date: 2010-11-08
    Description: Recent theoretical and experimental work in supersonic aerodynamics is reviewed with its practical application in mind. Several arrangements of supporting surfaces and bodies are discussed and in some cases comparisons of theory and experiment are made. Finally, certain phenomena connected with lift and drag in a rarefied medium are considered briefly.
    Keywords: AERODYNAMICS
    Type: Collected Works of Robert T. Jones; p 625-644
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  • 4
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    Theoretical determination of the minimum drag of airfoils at supersonic speeds (1976)
    In:  CASI
    Details
    Publication Date: 2010-11-08
    Description: A method is reported for determining mathematically the combined disturbance field, and in certain cases the minimum drag, of wings at supersonic speeds. The simplest analytic example is provided by the wing of elliptic planform, which achieves its minimum drag when the lift is distributed uniformly over the surface. With a symmetrical distribution of thickness, the requirement of minimum drag for a given total volume is found to lead to profiles of constant curvature.
    Keywords: AERODYNAMICS
    Type: Collected Works of Robert T. Jones; p 567-578
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  • 5
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    The minimum drag of thin wings in frictionless flow (1976)
    In:  CASI
    Details
    Publication Date: 2010-11-08
    Description: The assumptions of the thin airfoil theory are found to provide certain necessary conditions for the minimum drag of airfoils having a given total lift, a given maximum thickness, or a given volume. The conditions are applicable to steady or unsteady motions and to subsonic or supersonic speeds without restriction on the planform. The computation of drag and the statement of the conditions for minimum drag depend on the consideration of a combined flow field, which is obtained by superimposing the disturbance velocities in forward and reversed motions. If the planform of the airfoil and its total lift are given, it is found that, for minimum drag, the lift must be distributed in such a way that the downwash in the combined field is constant over the entire planform. If the planform is given and the thickness of the airfoil is required to contain a specified volume, then the thickness must be distributed over the planform in such a way that the pressure gradient of the combined field in the direction of flight is constant at all points of the wing.
    Keywords: AERODYNAMICS
    Type: Collected Works of Robert T. Jones; p 557-565
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  • 6
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    Calculation of the motion of an airplane under the influence of irregular disturbances (1976)
    In:  CASI
    Details
    Publication Date: 2010-11-08
    Description: The application of mathematical advances made in electricity and other branches to problems of airplane dynamics is demonstrated. The Heaviside-Bromwich methods of solution of linear differential equations are described and it is shown how these methods avoid the consideration of boundary conditions and of particular or complementary integrals. It is pointed out that if the solution of the differential equation is obtained for the case of a unit disturbance, the effect of varying disturbances may be found therefrom by Carson's theorem. A graphical solution of Carson's integral for irregular disturbances is given. The procedure of obtaining unit solutions of the equations is then taken up and the analogy between Heaviside's symbolic series solution and a physical procedure of approximation is shown. It is suggested that a fictitious impulsive disturbance be used in the treatment of initial motions.
    Keywords: AERODYNAMICS
    Type: Collected Works of Robert T. Jones; p 21-29
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  • 7
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    Three-dimensional wings of minimum pressure drag (1976)
    In:  CASI
    Details
    Publication Date: 2010-11-08
    Description: In linearized flow theory, certain very interesting extremal properties of wings can be derived under rather broad conditions without the use of a complicated mathematical apparatus. The present chapter reviews certain results of this theory and indicates some rather obvious extensions to incorporate various auxiliary conditions. Several examples illustrating the relation between the geometrical features of the wing and the lift distribution for minimum drag are given.
    Keywords: AERODYNAMICS
    Type: NASA. Ames Res. Center Collected Works of Robert T. Jones; p 645-656
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  • 8
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    Some recent developments in the aerodynamics of wings for high speeds (1976)
    In:  CASI
    Details
    Publication Date: 2010-11-08
    Description: The items discussed are: (1) a recently proposed correction formula for the effect of compressibility in two dimensional subsonic flow; (2) the equivalence rule and the area rule for transonic speeds; (3) reciprocal relations in linearized wing theory; and (4) some general results connected with the problem of minimum wave resistance. The paper concludes with an example showing indentation of the fuselage to obtain favorable interference with the wing at supersonic speeds.
    Keywords: AERODYNAMICS
    Type: Collected Works of Robert T. Jones; p 601-608
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  • 9
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    Theoretical correction for the lift of elliptic wings (1976)
    In:  CASI
    Details
    Publication Date: 2010-11-08
    Description: In the wing section theory the magnitude of the circulation, and hence of the lift, is determined by the velocity that would be induced near the trailing edge of the section in a non-lifting potential flow. In three dimensional flow the problem is complicated by the presence of the wake and no simple basic solution has been found. Treatment of the problem of a wing of finite span is reported on the basis of the two dimensional theory, corrected for the effect of the wake.
    Keywords: AERODYNAMICS
    Type: Collected Works of Robert T. Jones; p 245-249
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  • 10
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    Reduction of wave drag by antisymmetric arrangement of wings and bodies (1976)
    In:  CASI
    Details
    Publication Date: 2010-11-08
    Description: In theory, antisymmetric arrangements of wings and bodies can have smaller wave drag than corresponding mirror-symmetric arrangements. Thus, a long narrow oblique wing which presents the same aspect for two opposite directions of flight is potentially more efficient than corresponding (i.e., structurally equivalent) swept wing. The single continuous wing panel also adapts itself more readily to varying angles of obliquity, and hence, to varying flight speeds. Previous work on the aerodynamics and flight stability of oblique wing combinations is reviewed and a possible mode of application to transport aircraft operating at moderate supersonic speeds is suggested.
    Keywords: AERODYNAMICS
    Type: Collected Works of Robert T. Jones; p 657-664
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  • 11
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    The compressibility rule for drag of airfoil noses (1976)
    In:  CASI
    Details
    Publication Date: 2010-11-08
    Description: It is shown that the drag of any semi-infinite airfoil section in purely subsonic inviscid flow follows precisely the Prandtl-Glauert compressibility rule. The result for the parabola has application to leading edge corrections in thin airfoil theory.
    Keywords: AERODYNAMICS
    Type: Collected Works of Robert T. Jones; p 619-623
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  • 12
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    Possibilities of efficient high-speed transport airplanes (1976)
    In:  CASI
    Details
    Publication Date: 2010-11-08
    Description: Comparisons of wing-body combinations may not disclose the full effect of a loss in aerodynamic efficiency. If the thrust needs to be increased at a given altitude then more or larger engines will have to be used and the possibility of concealing them becomes less. In this process the lift drag ratio of the complete airplane may become still more unfavorable than indicated by the comparison. Primarily aerodynamic and structural considerations point toward the development of turbojet engines specifically adapted to operation in an atmosphere of one tenth normal density. In addition to the numerous other technological problems associated with operation at these high altitudes, the problems of safe descent and effective limitation to low speeds at low altitudes seem important.
    Keywords: AERODYNAMICS
    Type: Collected Works of Robert T. Jones; p 579-592
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  • 13
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    Leading-edge singularities in thin-airfoil theory (1976)
    In:  CASI
    Details
    Publication Date: 2010-11-08
    Description: If the thin airfoil theory is applied to an airfoil having a rounded leading edge, a certain error will arise in the determination of the pressure distribution around the nose. It is shown that the evaluation of the drag of such a blunt nosed airfoil by the thin airfoil theory requires the addition of a leading edge force, analogous to the leading edge thrust of the lifting airfoil. The method of calculation is illustrated by application to: (1) The Joukowski airfoil in subsonic flow; and (2) the thin elliptic cone in supersonic flow. A general formula for the edge force is provided which is applicable to a variety of wing forms.
    Keywords: AERODYNAMICS
    Type: Collected Works of Robert T. Jones; p 533-538
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  • 14
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    The use of conical and cylindrical fields in supersonic wing theory (1976)
    In:  CASI
    Details
    Publication Date: 2010-11-08
    Description: Some of the recent advances in the theory of thin airfoils are presented with particular reference to extensions of the theory to three dimensional flows and to supersonic speeds. The problem discussed herein is the calculation of the small disturbance velocities u, v, and w in the external field produced by the flight velocity V of the airfoil.
    Keywords: AERODYNAMICS
    Type: Collected Works of Robert T. Jones; p 483-497
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  • 15
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    The solar-wind spectrometer experiment (1970)
    In:  CASI
    Details
    Publication Date: 2004-12-06
    Description: Apollo 12 solar wind spectrometer and particle energy spectra at lunar surface
    Keywords: SPACE RADIATION
    Type: NASA. MANNED SPACECRAFT CENTER APOLLO 12- PRELIM. SCI. REPT. 1 JUN. 1970; P 75-81
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  • 16
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    Transonic/supersonic inlet R and D past, present, and future (1977)
    In:  CASI
    Details
    Publication Date: 2004-10-07
    Keywords: AERODYNAMICS
    Type: NASA Lewis Research Center Inlet Workshop; p 427-480
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  • 17
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    Probing the solar plasma with Mariner radio tracking data (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The range and Doppler radio tracking close to the sun made it possible to measure solar plasma dynamics. These were measured by means of a method known as differenced range versus integrated Doppler, which exploits the opposite change of group and phase velocity as the plasma density changes along the radio raypath. A simple solar plasma propagation model is proposed.
    Keywords: SPACE RADIATION
    Type: Proc. of the Conf. on Exptl. Tests of Gravitation Theories; p 105-110
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  • 18
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    Application of advanced aerodynamics to future transport aircraft (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Applications of supercritical airfoils to transport aircraft designs
    Keywords: AERODYNAMICS
    Type: NASA AIRCRAFT SAFETY AND OPERATING PROBL., VOL. 1 1971; P 165-176
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  • 19
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    Aircraft response to the wing trailing vortices generated by large jet transports (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Flight tests for evaluating effect of wing-tip vortex wake generated by large jet transports on smaller aircraft
    Keywords: AERODYNAMICS
    Type: NASA AIRCRAFT SAFETY AND OPERATING PROBL., VOL. 1 1971; P 115-126
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  • 20
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    Progress report on wing-trailing-vortex studies (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Effect of wing-tip vortex wakes generated by large jet transport aircraft on smaller airplanes
    Keywords: AERODYNAMICS
    Type: NASA AIRCRAFT SAFETY AND OPERATING PROBL., VOL. 1 1971; P 101-113
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  • 21
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    Gust alleviation (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Alleviation of lateral and longitudinal gust effects on aircraft
    Keywords: AERODYNAMICS
    Type: PERFORMANCE AND DYN. OF AEROSPACE VEHICLES 1971; P 505-553
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  • 22
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    Effects of aeroelasticity on static aerodynamic derivatives (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Effects of aeroelasticity on static longitudinal aerodynamic derivatives
    Keywords: AERODYNAMICS
    Type: PERFORMANCE AND DYN. OF AEROSPACE VEHICLES 1971; P 375-438
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  • 23
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    Design of bodies for low drag and high performance in practical hypersonic flight (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Minimizing drag and increasing performance of optimum shapes at hypersonic flight
    Keywords: AERODYNAMICS
    Type: PERFORMANCE AND DYN. OF AEROSPACE VEHICLES 1971; P 103-174
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  • 24
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    Methods of obtaining stability derivatives (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Least squares method and iteration technique for obtaining aerodynamic stability derivatives
    Keywords: AERODYNAMICS
    Type: PERFORMANCE AND DYN. OF AEROSPACE VEHICLES 1971; P 71-101
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  • 25
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    The solar-wind composition experiment (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Apollo 12 solar wind experiment and He-4 data
    Keywords: SPACE RADIATION
    Type: NASA. MANNED SPACECRAFT CENTER APOLLO 12- PRELIM. SCI. REPT. 1 JUN. 1970; P 99-102
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  • 26
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    Analysis of the flow field of a jet in a subsonic crosswind (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Jet induced flow field effects on V/STOL aircraft in subsonic transition flight
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 683-702
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  • 27
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    Procedures for designing supersonic bodies of revolution from prescribed surface pressure distributions (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Iterative method for designing supersonic body of revolution from surface pressure distribution
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 75-84
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  • 28
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    Cosmic ray experiment. Part A: Composition and energy spectra of solar cosmic ray nuclei (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The GE experiment consisted of two types of detectors: plastics and glasses located in panel 2 and the lower half of panel 3. In panel 2, the entire exposed detector area of 14.7 by 22.6 cm was composed of 31 sheets of 0.025-cm polycarbonate plastic 9070-112. In panel 3, 39 sheets of 0.02-cm cellulose triacetate with no plasticizer made up the major volume fraction. The lower part of panel 3 contained five types of glass detectors. Particles that entered the array after it was folded were recognized, if they crossed from one sheet to another, by means of a 2-mm relative shift of alternate sheets.
    Keywords: SPACE RADIATION
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 9 p
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  • 29
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    Composition of interplanetary particles at energies from 0.1 to 150 MeV/nucleon, part B (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: During the Apollo 16 mission, a solar flare produced an enormous amount of low-energy nuclei, many orders of magnitude greater than the level inferred from studies of tracks in the window of the Apollo 12 spacecraft during a time when the sun was quiet. The differential energy spectrum of nuclei with Z less than or equal to 6 falls by seven orders of magnitude over the interval from 0.1 to 20 MeV/nucleon, then remains almost flat up to approximately 100 MeV/nucleon. The two parts correspond to contributions from the sun and from galactic cosmic rays. Any maximum in the spectrum occurs below the lowest energy studied.
    Keywords: SPACE RADIATION
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 8 p
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  • 30
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    Solar cosmic ray, solar wind, solar flare, and neutron albedo measurements, part C (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: All mineral detectors exposed on Apollo 16 had high surface track densities probably produced by a solar flare that occurred during the mission. The heavy ions followed a power law spectrum with exponent approximately 3 down to approximately 200 KeV/nucleon. The abundance of low-energy particle tracks observed in this flare may explain the high track densities observed in lunar dust grains. Pristine heavy-particle tracks in feldspar give long tracks. Shallow pits similar to those expected from extremely heavy solar wind ions were observed in about the expected number. Initial results give a low apparent value of neutron albedo relative to theory.
    Keywords: SPACE RADIATION
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 14 p
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  • 31
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    Solar flares, the lunar surface, and gas rich meteorites (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Investigations on the Fe-group nuclei track density vs depth in lunar rocks and Surveyor 3 TV camera filter glass were critically examined considering more factors than previously. The analysis gives a firmer basis to the observation of the preferential leakage of low energy Fe nuclei from the accelerating region of the sun. The track density gradients in lunar rock 12022 and filter glass are used to determine the lunar erosion rate of 3 angstroms/yr. Track gradients are less steep than predicted from energy spectrum observed in the Surveyor glass, perhaps due to sputtering. High densities of etchable tracks were found at all depths down to 60 cm in fines from Apollo cores and also in thin sections of the Pesjanoe, Pantar, and Fayetteville gas-rich meteorites. It is felt unlikely that suprathermal heavy ions were responsible for the high track densities.
    Keywords: SPACE RADIATION
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 221-226
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  • 32
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    Very heavy solar cosmic rays: Energy spectrum and implications for lunar erosion (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Particle tracks were investigated in the glass plate of a neutral density (clear flint) optical filter housed in the Surveyor 3 TV camera but exposed directly to space. The track density vs depth curve was determined and descends sharply from approximately 2.6 million tracks/sq cm at a depth of 3.6 mg/sq cm to about 35/sq cm at 700 mg/sq cm. Several tracks were of V-shapes characteristic of high energy induced fission. The erosion rate on the moon due to solar wind ions was determined from the energy spectrum, and was found to be low (0 to 2 x 10 to the minus 8th power cm/yr).
    Keywords: SPACE RADIATION
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 213-216
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  • 33
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    Solar and galactic cosmic ray exposure of Surveyor 3 as determined from cosmogenic radionuclide measurements (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The proton-produced Na-22 content of samples of Surveyor 3 TV camera, surface sampler scoop, and other components was determined by nondestructive gamma ray spectrometry. The contributions of the nine most prominent solar flares to Na-22 production were calculated to be 18 dpm/kg. The observed activity in the Surveyor 3 samples was 62 + or - dpm/kg. This indicates a galactic proton contribution of about 44 dpm/kg, which adjusted for spallation of Al gives a value of 42 dpm/kg. This is compared to measurements of 88 dpm/kg in the Lost City meteorite which had an orbit extending to 2.35 AU, with a 4 pi bombardment as compared to the 2 pi bombardment of the samples on the lunar surface. The agreement between Na-22 production in Surveyor 3 and the Lost City meteorite offers evidence that the galactic cosmic ray flux is almost the same at 1 Au and at 2.35 AU.
    Keywords: SPACE RADIATION
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 196-200
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  • 34
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    Long duration solar active regions (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Nimbus 3 and 4 observations of ultraviolet active regions of the sun have been investigated. It is not clear what is producing these UV-active regions, however, it could be changes in the overall intensity of the solar continuum near the region of the temperature minimum, or the solar flux variations that have been seen could be due to a continuous type of absorption like that associated with the ionization limits of elements such as aluminum, silicon, or magnesium.
    Keywords: SPACE RADIATION
    Type: Significant Accomplishments in Sci., 1970; p 159-163
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  • 35
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    The stability of tangential discontinuities (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Intuition regarding the stability of MHD tangential discontinuities of solar wind has been borne out by a linear stability analysis of the MHD equations. In performing the calculation, the model used had no plasma flow and thus corresponded to the solar wind rest frame. The method calculated the change in total energy, plasma plus magnetic, due to the perturbation. This type of stability analysis is analogous to the test of the stability of an equilibrium point in a mechanical potential.
    Keywords: SPACE RADIATION
    Type: Significant Accomplishments in Sci., 1970; p 134-139
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  • 36
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    Solar wind heat flow (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The ability of a theoretical solar wind model to predict the energy flux density due to heat conduction was investigated. In order to demonstrate this capability, the analysis used simultaneous data from the electron plasma experiment of Ogilvie and Lind, and the vector magnetic field data of Heppner and Sugiura on OGO-5. On the strength of two independent, different, and consistent experimental determinations of the conduction of heat flux by electrons at 149.6 gigameters(1 AU), it was determined that the models for the solar wind must be able to predict a value for the heat conduction in the range 0.007 to 0.008 in order to be in agreement with the observations.
    Keywords: SPACE RADIATION
    Type: Significant Accomplishments in Sci., 1970; p 144-148
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  • 37
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    Solar X-rays and particle acceleration (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The process of solar flare acceleration of interplanetary particles, as measured by the fifth orbiting solar observatory, is explained. Data show the acceleration proceeds in two stages: (1) particle acceleration by induced electric fields arising from annihilating magnetic fields at the beginning stages of flares, and (2) a Fermi acceleration mechanism operating in a shock front produced by the flare.
    Keywords: SPACE RADIATION
    Type: Significant Accomplishments in Sci., 1970; p 171-175
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  • 38
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    On the accuracy of the relativistic parameters beta, gamma, and the solar oblateness coefficient J2, as deduced from ranging data of a drag-free space probe (1971)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Motion in the general gravity field is described mathematically. A covariance analysis, based on two simple models, is presented. Two drag-free space probes were considered, for which the orbital elements are given.
    Keywords: SPACE RADIATION
    Type: JPL Proc. of the Conf. on Exptl. Tests of Gravitation Theories; p 242-244
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  • 39
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    Study of the determination of the coefficients beta and gamma of the generalized metric of Robertson and of the dynamical oblateness of the sun (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Motion of a space probe about a spherical center of attraction is considered, applying the general theory of relativity. Motion of a probe under the influence of the sun's oblateness is also discussed. Estimates of beta, gamma, and J20 using solar probe motion are presented. It is concluded that such measurements are possible if the unknown long-period perturbing acceleration is of the order of 10 to the -11th or -12th power m/sec. sq.
    Keywords: SPACE RADIATION
    Type: JPL Proc. of the Conf. on Exptl. Tests of Gravitation Theories; p 222-227
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  • 40
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    Radio propagation measurements of the solar corona and gravitational fields: Applications to Mariner 6 and 7 (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Results from interferometric measurements of the apparent angular deflection of quasi-stellar object are examined. Some preliminary results from Mariner 6 and 7 experiments, particularly from the plasma effect viewpoint, are discussed, along with future experiments and plasma scintillation. Ray bending studies, plasma relativity separation for Mariner 6 and 7, and radio propagation test of general relativity are reviewed. First order approximations and time delay studies are appended, as well as Doppler velocity effect investigations.
    Keywords: SPACE RADIATION
    Type: Proc. of the Conf. on Exptl. Tests of Gravitation Theories; p 92-104
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  • 41
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    A measurement of the general relativistic time delay with data from Mariners 6 and 7 (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The technique for obtaining range measurements is discussed. It involves measuring elapsed time between the transmission of an encoded signal from the ground station and its return from the spacecraft. The theoretical background for the Mariner Mars 1969 relativity test is presented, including computation of orbits and time transformation. Interplanetary and coronal plasma effects on range and Doppler observations at S-band are also considered. The general relativistic propagation delay was measured and a value of 0.997 for the relativity parameter Gamma star was obtained.
    Keywords: SPACE RADIATION
    Type: Proc. of the Conf. on Exptl. Tests of Gravitation Theories; p 111-135
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  • 42
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    The space radiation environment in low altitude and low inclination orbits (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Charged particle dose rates for men and radiation sensitive materials during long-duration flights in low orbit
    Keywords: SPACE RADIATION
    Type: OPT. TELESCOPE TECHNOL. 1970; P 495-499
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  • 43
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    Ground-wind-load considerations for space shuttle vehicles (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Ground wind loads on reusable space shuttles
    Keywords: AERODYNAMICS
    Type: SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 143-160
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  • 44
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    Buffet and aerodynamic noise (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Space shuttle buffeting and aerodynamic noise
    Keywords: AERODYNAMICS
    Type: SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 238-247
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  • 45
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    Theoretical investigation of ducted fan interference for transport-type aircraft (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Ducted fan interference analysis for transport aircraft
    Keywords: AERODYNAMICS
    Type: NASA, WASHINGTON ANAL. METHODS IN AIRCRAFT AERODYN. 1970; P 703-719
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  • 46
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    Time-dependent numerical method for treating complicated blunt-body flow fields (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Time-dependent numerical method for blunt body flow field solutions
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 177-195
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  • 47
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    A critical evaluation of analytic methods for predicting laminar-boundary-layer shock-wave interaction (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Prediction methods for boundary layer and flow field characteristics in shock wave-boundary layer interaction
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 515-539
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  • 48
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    A numerical method for computing three-dimensional viscous supersonic flow fields about slender bodies (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Numerical analysis of three dimensional viscous supersonic flow fields about slender bodies
    Keywords: AERODYNAMICS
    Type: NASA, WASHINTON ANAL. METHODS IN AIRCRAFT AERODYN. 1970; P 265-321
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  • 49
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    In-flight aeroacoustic environments on prospective space shuttle vehicles (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The problem of in-flight aerodynamic noise has been studied by reliable estimates of full scale surface-pressure fluctuations from scale model tests in wind tunnels. Scaling relationships have been verified, and many details of the fluctuating pressure characteristics such as spatial correlation and convection velocities are understood. The effects of the wind tunnel environmental turbulence and noise have also been investigated sufficiently so that threshold levels of usable data are known.
    Keywords: AERODYNAMICS
    Type: NASA Space Shuttle Technol. Conf.; p 71-96
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  • 50
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    Solar particle tracks in glass from Surveyor 3 (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Samples of glass from the Surveyor 3 TV camera filter were examined for particle tracks by optical and scanning electron microscopy. The corrected density value is 1.7 million + or - 0.1 million tracks/sq cm, and the track density vs depth curve is determined. Comparisons with other estimated and calculated data are discussed, and lack of agreement between data sets is considered. It is felt that considerable erosion occurs, and that erosion also occurs by a flaking of small thicknesses of material, possibly caused by solar wind irradiation.
    Keywords: SPACE RADIATION
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 209-212
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  • 51
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    Enhanced emission of iron nuclei in solar flares (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A silica glass window from Apollo 12 CM and a piece of flint glass from the Surveyor 3 camera filter were examined for Fe nuclei tracks. A large difference between observed and predicted track densitites was found. At low rigidity (or energy), the solar particle Fe/He ratio is much higher than the photospheric abundance ratio, but decreases with increasing rigidity until it approaches the photospheric value at a rigidity of about 500 MV. It is felt that the low-energy Fe tracks are of solar origin. The implications that heavy nuclei can be preferentially emitted from a source of energetic particles are discussed. Other conclusions are the following: Rocks exposed on the lunar surface for 10 million yr would accumulate about 6 x 10 to the 12th power tracks/sq cm, and the rate of radiation-induced erosion is about 10 to the -9 cm/yr. The lunar soil should contain heavily irradiated small grains, some with track densities of about 10 to the 12th power/sq cm that have flaked from radiation-damaged rock surfaces and some that were irradiated while at the top of the soil layer.
    Keywords: SPACE RADIATION
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 217-220
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  • 52
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    Experiment S009: Nuclear Emulsion (1971)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The first exposure on a spacecraft of a nuclear emulsion apparatus designed to collect 1000 high quality tracks of heavy nuclei under a negligible thickness of matter (0.07 g/sq cm) is described. The cosmic ray detector consisted of a stack of nuclear emulsions that were designed to register at least 400 heavy nuclei tracks for each 10 hours of useful exposure. The spacecraft had to be oriented in a heads-up attitude during the 10-hour period to eliminate atmospheric albedo particles. The results are as follows: (1) a definite odd-even effect, with low abundances for elements of atomic number 7, 9, and 11; (2) a ratio O/C approximately 0.9; (3) Ne/C, Mg/C, and Si/C ratios between 0.2 and 0.3; (4) an abundance gap in the region 15 less than or equal to Z less than or equal to 19; and (5) a ratio (20 less than or equal to Z less than or equal to 28)/C 0.2, with a large concentration at Z = 26. These results are indicative that successful exposures of nuclear emulsions were obtained on the Gemini 11 mission.
    Keywords: SPACE RADIATION
    Type: NASA. Manned Spacecraft Center The Gemini Program: Phys. Sci. Expt. Sum.; p 215-225
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  • 53
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    Optimization of supersonic inlets using the method of characteristics (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Method of characteristics for computerized design of optimal supersonic inlets
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 569-581
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  • 54
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    A new method for calculating near and far field pressure about arbitrary configurations (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Aerodynamic method of characteristics for pressure field calculations about wing-body combinations
    Keywords: AERODYNAMICS
    Type: L METHODS IN AIRCRAFT AERODYN. 1970; P 215-227
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  • 55
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    The analysis of propeller-wing flow interaction (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Numerical analysis of propeller-wing flow interaction with slipstreams
    Keywords: AERODYNAMICS
    Type: NASA, WASHINGTON ANAL. METHODS IN AIRCRAFT AERODYN. 1970; P 721-742
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  • 56
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    Solar wind composition experiment (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The Apollo 16 SWC experiment is a continuation of the earlier experiments; however, an essential change was introduced in the solar wind particle collection technique. Platinum surfaces were incorporated in the collector foil, and use was made of a layer technique for distinguishing particles of different energies and different directions of arrival. The improvements and the expanded scope of the Apollo 16 experiment, relative to the earlier SWC experiments, can be summarized as follows: elimination of possible residual dust contamination by treating the platinum foil sections with dilute hydrofluoric acid before analysis; increased accuracy of solar wind argon abundance; determination of solar wind albedo; and search for helium in the energy range above approximately 40 KeV/nucleon.
    Keywords: SPACE RADIATION
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 10 p
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  • 57
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    The flare forecasting fiasco: Is everybody looking at the same sun? (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The passionate dream of the oppressed solar flare forecaster is the scientific discovery of the cause, the energy source, and the observable antecedent conditions for the solar flare. This tunnel vision has had a profound and deleterious effect on the state-of-the-art. It has diverted attention from many promising approaches and relegated them to limbo. More importantly, it has actually inhibited the scientific search for the underlying physical mechanisms. Examples of neglected aspects of the problem cover the entire range from observing techniques and equipment to the availability and accuracy of the archived scientific data. A cursory inspection of this data leads to an obvious conclusion: there are at least two suns up there.
    Keywords: SPACE RADIATION
    Type: NASA, Washington Phys. of the Space Environment; p 157-171
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  • 58
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    Solar wind rare gas analysis: Trapped solar wind helium and neon in Surveyor 3 material (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The He-4 and Ne-20 contents in sections of the Surveyor 3 support strut samples were determined by optical and scanning electron microscopy and are compared to the results of the Apollo solar wind composition (SWC) experiments. The He-4/Ne-20 ratio in the samples from the sunlit side of the strut was approximately 300; the ratios determined in Apollo 12 lunar fines and SWC foil were below 100. The He-4/He-3 ratios were also determined, and the ratio obtained from Surveyor 3 material is higher than those found with Apollo 11 and 12 SWC experiments. The effects of spallation by cosmic rays or solar protons, stripping by cosmic ray or energetic solar alpha particles, recycling of solar wind He and radiogenic Ne, He from terrestrial atmosphere, mass discrimination near the moon, mass dependence of trapping probability, diffusion, and contamination by lunar dust are considered.
    Keywords: SPACE RADIATION
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 201-208
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  • 59
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    Quasi-seasonal variation in the sun (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The results of an investigation on the effects of earth seasonal changes on solar activity, particularly sunspots, are given. These results show corpuscular and electromagnetic activity increased during the equinoctial months. In addition the electromagnetic aspect tends to increase during the winter months. It was suggested that seasonal changes in sunspot numbers may be caused by the tidal forces and the processional torques exerted by the various planets in the solar atmosphere.
    Keywords: SPACE RADIATION
    Type: Significant Accomplishments in Sci., 1970; p 164-170
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  • 60
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    Hydromagnetic heating in the solar wind (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Hydromagnetic heating in the solar wind was investigated using the heating model in which fast-mode hydromagnetic waves propagate outward from below the base and deposit energy by collisionless damping. Ray paths were found by solving Hamilton's equations. As the ray propagates along its path, it will damp, supplying thermal energy to the solar wind gas. The strong agreement of these results with observations is clear indication that the primary nonthermal heat source in the solar wind is the collisionless damping of hydromagnetic waves.
    Keywords: SPACE RADIATION
    Type: Significant Accomplishments in Sci., 1970; p 140-143
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  • 61
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    Wind tunnel simulation of ground wind shear and turbulence spectra with possible application to space shuttle launch problems (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Wind tunnel simulation of ground wind shear and turbulence spectra and application to space shuttle launching
    Keywords: AERODYNAMICS
    Type: NASA. LEWIS RES. CENTER SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 161-175
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  • 62
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    Theoretical studies of vortex flow on slender wing-body combinations (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Lift and pressure distribution calculations for winged body with leading edge vortices
    Keywords: AERODYNAMICS
    Type: NASA, WASHINGTON ANAL. METHODS IN AIRCRAFT AERODYN. 1970; P 113-129
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  • 63
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    Finite-difference analysis of the compressible turbulent boundary layer on a blunt swept slab with leading-edge blowing (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Finite difference solution for compressible turbulent boundary layer equations of swept slab with leading edge blowing
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 417-472
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  • 64
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    Recent advances in research on compressible turbulent boundary layers (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Review of prediction methods for compressible turbulent boundary layers
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 355-416
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  • 65
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    An analysis of finite-difference techniques applied to equations governing convective transfer (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Finite difference analysis of hyperbolic partial differential equations
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 245-264
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  • 66
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    Prediction of supersonic and hypersonic inlet flow fields (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Computer programs for predicting flow field properties in supersonic and hypersonic inlets
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 583-595
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  • 67
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    Improvement of wing-body interference theory for hypersonic speeds (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Wing-body interference theory for calculating lift slope and stability at hypersonic speed
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 101-111
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  • 68
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    Some recent developments in subsonic lifting-surface theory (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Numerical lifting surface theory with spanwise distribution of control points
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 1-35
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  • 69
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    Application of the method of characteristics to noncircular bodies at angle of attack (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Method of characteristics for flow field analysis on elliptical winged body
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 159-176
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  • 70
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    The use of finite element methods for predicting the aerodynamics of wing-body combinations (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Finite element method for predicting aerodynamic characteristics of wing-body combinations
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 37-51
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  • 71
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    Potential flow solutions for inlets of VTOL lift fans and engines (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Potential flow solution for VTOL inlets in static and crossflow operation
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 659-681
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  • 72
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    Methods of analyzing propeller and rotor boundary layers with crossflow (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Analysis of secondary flow effects in propeller and rotor boundary layers
    Keywords: AERODYNAMICS
    Type: NASA, WASHINGTON ANAL. METHODS IN AIRCRAFT AERODYN. 1970; P 473-514
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  • 73
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    A new method for analysis of transonic flow (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Finite difference method for transonic flow solution in axial stator
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 597-621
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  • 74
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    A method for analyzing the interaction of an oblique shock wave and a boundary layer (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Method of characteristics for calculating oblique shock wave interaction with turbulent boundary layer
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 541-567
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  • 75
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    A critical evaluation of panel flutter aerodynamics (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Aerodynamic forces in supersonic panel flutter
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 335-353
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  • 76
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    An analysis of Coanda jet flows (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Static laminar Coanda jet flow around circular cylinder with external flow entrainment
    Keywords: AERODYNAMICS
    Type: NASA, WASHINGTON ANAL. METHODS IN AIRCRAFT AERODYN. 1970; P 197-214
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  • 77
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    Empirical method for estimating pressures on elliptic cones (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Correlation method for estimating pressure distribution over elliptic supersonic cones
    Keywords: AERODYNAMICS
    Type: L. METHODS IN AIRCRAFT AERODYN. 1970; P 85-99
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  • 78
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    Calculative techniques for transonic flows (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Calculation methods for predicting transonic aerodynamic characteristics of wing-body combinations
    Keywords: AERODYNAMICS
    Type: NASA, WASHINGTON ANAL. METHODS IN AIRCRAFT AERODYN. 1970; P 53-73
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  • 79
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    Flutter and unsteady lift theory (1971)
    In:  CASI
    Details
    Publication Date: 2009-11-16
    Description: Aeroelasticity and unsteady flow problems of aircraft
    Keywords: AERODYNAMICS
    Type: PERFORMANCE AND DYN. OF AEROSPACE VEHICLES 1971; P 289-374
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  • 80
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    The relevance of recent advances in unsteady aerodynamics to the space shuttle program (1970)
    In:  CASI
    Details
    Publication Date: 2009-11-17
    Description: Prediction of steady and unsteady airloads on space shuttles
    Keywords: AERODYNAMICS
    Type: NASA. LEWIS RES. CENTER SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 223-237
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  • 81
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    Biocore experiment (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The Apollo 17 biological cosmic ray experiment to determine the effect of heavy cosmic ray particles on the brain and eyes is reported. The pocket mouse was selected as the biological specimen for the experiment. The radiation monitors, animal autopsy and animal processing are described, and the radiation effects on the scalp, retina, and viscera are analyzed.
    Keywords: SPACE RADIATION
    Type: NASA. Johnson Space Center Apollo 17 Prelim. Sci. Rept.; 14 p
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  • 82
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    Ultraviolet spectrometer experiment (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The ultraviolet spectrometer (UVS) onboard the Apollo 17 orbiting spacecraft was used to measure emissions from the lunar atmosphere. The UVS and calibration are discussed along with the lunar atmosphere observations and lunar albedo measurements.
    Keywords: SPACE RADIATION
    Type: NASA. Johnson Space Center Apollo 17 Prelimin. Sci. Rept.; 10 p
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  • 83
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    The nature of interplanetary heavy ions with 0.1 less than E less than 40 MeV/nucleon (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The populations of interplanetary particles were studied by examining the energy spectra in a cosmic ray detector placed in the shade, facing away from the sun. Suprathermal ions of solar origin, and low-energy galactic cosmic rays are discussed.
    Keywords: SPACE RADIATION
    Type: NASA. Johnson Space Center Apollo 17 Prelim. Sci. Rept.; 5 p
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  • 84
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    Quiet time energy spectra of heavy nuclei from 20 to 400 keV/amu (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Glass track detectors were exposed to cosmic rays on the moon from December 11 to 13, 1972, during a period of relatively quiet sun activity as inferred from satellite proton counters. From 80 to 400 keV/amu, the differential flux of heavy cosmic ray nuclei decreases roughly as E to the -2nd power; this result together with the greater flux from the solar than the antisolar direction identify these nuclei as solar in origin.
    Keywords: SPACE RADIATION
    Type: NASA. Johnson Space Center Apollo 17 Prelim. Sci. Rept.; 4 p
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  • 85
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    An X-ray experiment for the outer planet grand tour mission (1971)
    In:  CASI
    Details
    Publication Date: 2006-08-20
    Keywords: SPACE RADIATION
    Type: Res. in the Space Sci., v. 2; 10 p
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  • 86
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    Cosmic-ray propagation and containment (1977)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: The cosmic rays are an active gaseous component of the disk of the galaxy, and their propagation and containment is a part of the general dynamics of the disk. The sources of cosmic rays are a matter of speculation. The disk is inflated by the cosmic-ray gas pressure, P, comparable to the magnetic pressure B super 2/ 8 pi, but the rate of inflation is unknown. The time spent by the individual cosmic-ray particles in the disk is inversely proportional to the cosmic-ray production rate and may be anything from 100,000 to more than 10 million years. It is evident from the decay of Be(10) that the cosmic rays circulate through a volume of space perhaps ten times the thickness of the gaseous disk, suggesting a magnetic halo extending out approximately 1 kpc from either face of the disk. The cosmic rays may be responsible for the halo by inflating the magnetic fields of the disk. Extension of the fields to 1 kpc would imply a high production rate and short life of cosmic rays in the dense gaseous disk of the galaxy.
    Keywords: SPACE RADIATION
    Type: NASA. Goddard Space Flight Center The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 283-299
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  • 87
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    Small scale local gamma ray features (1977)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: In order to draw implications from nearby gamma-ray emission, the different ways that can be used to obtain an estimate of the amount of matter on each line of sight are investigated. It is shown that, within present uncertainties, the cosmic ray intensity inside molecular clouds within 1 kpc from the sun is the same as the cosmic ray intensity measured at the sun. In the last part, what can be learned from a comparison of far infrared and gamma-ray data is discussed.
    Keywords: SPACE RADIATION
    Type: NASA. Goddard Space Flight Center The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 229-236
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  • 88
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    The nonthermal radiation in the galaxy (1977)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: Observations of the distribution of brightness at intermediate latitudes in the galaxy and of the edge-on spiral galaxy, NGC 891, indicate that the emissivity extends to heights of several kpc perpendicular to the plane. In several galaxies, the angular distributions of neutral hydrogen and nonthermal emission are roughly coextensive and show similar features such as spiral structure. If radio galaxies and normal galaxies with strong nuclear radio sources are excluded, there appears to be a proportionality between their total H(I) content and their nonthermal radio luminosity.
    Keywords: SPACE RADIATION
    Type: NASA. Goddard Space Flight Center The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 189-202
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  • 89
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    Very high-energy gamma ray astronomy (1977)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: Recent results in ground-based very high-energy (less than 10 to the eleventh power eV) gamma-ray astronomy are reviewed. The various modes of the atmospheric Cerenkov technique are described, and the importance of cosmic ray rejection methods is stressed. The positive detections (at approximately less than 10 to the 12th power eV) of the Crab pulsar that suggest a very flat spectrum and time-variable pulse phase are discussed. Observations of other pulsars (particularly Vela) suggest that these features may be general. The steady flux upper limits for the Crab Nebula are thus reconsidered, and a new value of the implied (Compton-synchrotron) magnetic field in the Nebula is reported. Evidence that a 4.8-hour modulated effect was detected at E sub gamma is less than 10 to the 12th power eV from Cyg X-3 is strengthened in that the exact period originally proposed agrees well with a recent determination of the X-ray period. The southern sky observations are reviewed, and the significance of the detection of an active galaxy (NGC 5128) is considered for source models and future observations.
    Keywords: SPACE RADIATION
    Type: NASA. Goddard Space Flight Center The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 81-98
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  • 90
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    The time structure of the gamma-ray emission from the Crab and Vela pulsars (1977)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: High resolution data on the pulsed gamma-ray emission from the Crab and Vela pulsars are presented. The light curves of these two pulsars at gamma-ray energies show striking similarities. The measured pulsed intensity from Vela at energies greater than 50 MeV was found to be .000013 sq cm/sec. The energy spectrum is not consistent with a power law.
    Keywords: SPACE RADIATION
    Type: The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 53-64
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  • 91
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    Low- and medium-energy galactic gamma-ray observations (1977)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: Observation of 0.2 to 100 MeV-diffuse gamma-radiation emitted from a galaxy provides information on the intensities of 5 to 50 MeV/nucleon cosmic-rays and approximately less than 50-MeV electrons in interstellar space. Recent measurements of gamma-rays emitted from the galactic center region provide evidence for a diffuse continuum between 10 and 100 MeV, which is dominant over the pi-decay emission generated in high-energy nuclear collisions. The intensities of the recently reported nuclear line gamma-rays, also observed in the direction of the galactic center, require the presence of intense fluxes of low energy cosmic rays in the inner galaxy if the gamma-ray are produced on a galactic scale. Current detection techniques for 0.1 to 100 MeV gamma-ray measurements are summarized, and their capabilities for measuring the diffuse galactic emission are evaluated.
    Keywords: SPACE RADIATION
    Type: NASA. Goddard Space Flight Center The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 65-80
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  • 92
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    COS-B observations of the high-energy gamma radiation from the galactic disk (1977)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: The COS-B experiment has observed approximately one-fourth of the galactic disk, including the galactic-center region, the galactic anticenter, and the Vela region. A completely automatic analysis of the events recorded during these observations reveals a galactic gamma ray emission from the three regions. In the galactic center and Vela regions, the disk emission distribution was measured. From these data, the existence of a local (less than 1 kpc) and a distant (greater than 3 kpc) emitting region is apparent in the general direction of the inner galaxy.
    Keywords: SPACE RADIATION
    Type: The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 41-44
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  • 93
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    The COS-B experiment and mission (1977)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: The COS-B satellite carries a single experiment, capable of detecting gamma rays with energies greater than 30 MeV to study the spatial, energy, and time characteristics of high-energy radiation of galactic and extragalactic origin. The capability to search for gamma ray pulsations is enhanced by the inclusion in the payload of a proportional counter sensitive of X-rays of 2 to 12 keV. The experiment was calibrated using particle accelerators. The results of these measurements are presented, and the performance of the system in orbit is discussed.
    Keywords: SPACE RADIATION
    Type: The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 29-40
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  • 94
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    COS-B observations of localized sources of gamma-ray emission (1977)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: In October 1975, the high-energy gamma-ray flux from the Vela pulsar measured by COS-B was found to be 1.6 to 2.1 times higher than the flux measured by SAS-2 in 1973. This factor is too large to be accounted for by error in the COS-B calibration or analysis. This is supported by a comparison of the COS-B measurement of the narrow-line component from the galactic center region with the flux derived from the measurements of SAS-2; the COS-B flux comes out about 15 percent lower than the SAS-2 figure. It is interesting to note that a glitch in the pulsar period took place about 1 month prior to the COS-B observation; the previous glitch occurred about 1.5 years before the SAS-2 observation. The increased rotational energy loss after the glitch cannot simply explain the increased gamma-ray luminosity. If the two phenomena are related, the gamma-ray emission, absorption, or beaming process must be extremely sensitive to changes in rotational parameters. The existence is confirmed of a second region of enhanced radiation in the galactic anticenter in addition to that from the Crab pulsar.
    Keywords: SPACE RADIATION
    Type: The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 45-52
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  • 95
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    SAS-2 galactic gamma-ray results. 2: Localized sources (1977)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: Gamma ray emission was detected from the radio pulsars PSR 1818-04 and PSR 1747-46, in addition to the previously reported gamma ray emission from the Crab and Vela pulsars. Because the Crab pulsar is the only one observed in the optical and X-ray bands, these gamma ray observations suggest a uniquely gamma ray phenomenon occurring in a fraction of the radio pulsars. PSR 1818-04 has a gamma ray luminosity comparable to that of the Crab pulsar, whereas the luminosities of PSR 1747-46 and the Vela pulsar are approximately an order of magnitude lower. SAS-2 data for pulsar correlations yielded upper limits to gamma ray luminosity for 71 other radio pulsars. For five of the closest pulsars, upper limits for gamma ray luminosity are found to be at least three orders of magnitude lower than that of the Crab pulsar. Gamma ray enhancement near the Milky Way satellite galaxy and the galactic plane in the Cygnus region is also discussed.
    Keywords: SPACE RADIATION
    Type: The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 15-26
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  • 96
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    SAS-2 galactic gamma-ray results. 1: Diffuse emission (1977)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: Continuing analysis of the data from the SAS-2 high energy gamma ray experiment has produced an improved picture of the sky at photon energies above 35 MeV. On a large scale, the diffuse emission from the galactic plane is the dominant feature observed by SAS-2. This galactic plane emission is most intense between galactic longitudes 310 deg and 45 deg, corresponding to a region within 7 kpc of the galactic center. Within the high-intensity region, SAS-2 observes peaks around galactic longitudes 315, 330, 345, 0, and 35 deg. These peaks appear to be correlated with galactic features and components such as molecular hydrogen, atomic hydrogen, magnetic fields, cosmic-ray concentrations, and photon fields.
    Keywords: SPACE RADIATION
    Type: The Struct. and Content of the Galaxy and Galactic Gamma Rays; p 3-14
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  • 97
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    Comments on wind-tunnel-flight correlations for the F-8 supercritical wing configurations (1977)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Keywords: AERODYNAMICS
    Type: Supercritical Wing Technol.: A Report on Flight Evaluation; p 111-120
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  • 98
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    Summary and future plans (1972)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Keywords: AERODYNAMICS
    Type: Supercritical Wing Technol.: A Report on Flight Evaluation; p 121-133
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  • 99
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    Piloting and operational aspets of the F-8 supercritical wing airplane (1972)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Keywords: AERODYNAMICS
    Type: Supercritical Wing Technol.: A Report on Flight Evaluation; p 97-110
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  • 100
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    Status of the F-8 supercritical wing program (1972)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Keywords: AERODYNAMICS
    Type: Supercritical Wing Technol.: A Report on Flight Evaluation; p 49-58
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