Showing papers in "Planetary and Space Science in 1966"

TL;DR: MHD equations applied to hypersonic flow of solar plasma around magnetosphere and approximation with simpler equations of gas dynamics were used to simulate the solar plasma in the magnetosphere.

TL;DR: In this article, an investigation has been made of ion collision frequencies and energy transfer for conditions of gaseous thermal nonequilibrium following the methods of a development devoted to electron collisions, the problems of ion-neutral and ion-ion elastic collisions have been considered under the assumption of separate Maxwellian velocity distributions.

TL;DR: In this paper, the problem of elastic collisions and energy transfer between gases which have separate Maxwellian velocity distributions was studied and an analysis was made of the collision frequency in terms of an average momentum transfer cross section which was defined for conditions of thermal nonequilibrium.

TL;DR: In this article, a general review of dayglow excitations which may occur through five types of process: dissociative recombination of molecular ions; fluorescence (including resonance scattering) of sunlight; photodissociation of molecules; chemical reactions and collisions with energetic electrons.

TL;DR: In this paper, the authors investigated the dependence of the frequency distribution of auroral displays in the zenith on latitude and on local time in magnetically quiet (Kp⩽1) and magnetically disturbed (k p⩾5) periods using observational data from the all-sky camera network in the northern hemisphere for 1957-1959.

TL;DR: Auroral oval, auroral substorm and relations with internal magnetospheric structure during growth and decay of ring current and neutral sheet current are discussed in this article, along with a discussion of the relationship between the magnetosphere and magnetosphere.

TL;DR: In this paper, the results of observations of upper atmospheric winds made during the I.Q.S. by the radio-meteor technique are described and discussed, and a comparison is made with other data obtained in the Northern Hemisphere.

TL;DR: In this paper, the authors considered the role of the Chapman-Ferraro boundary current, the tail current, and the ring current in transferring the force of the solar wind to the Earth through their interaction with the geomagnetic field.

TL;DR: In this paper, the vertical luminosity profiles of sixteen auroral arcs have been measured in the light of λ3914 (N2+) by a technique of photometric triangulation.

TL;DR: A scanning ultraviolet spectrometer was flown from Wallops Island, Va. on NASA Aerobee 4.85 on November 17, 1963 at 1:15 p.m. EST to an altitude of 185 km as discussed by the authors.

TL;DR: In this paper, a set of ion-molecule reaction rates and recombination coefficients consistent with recent mass spectrometric data obtained between 120 and 220 km were obtained, and it was shown that the recombination coefficient for NO+ decreases with electron temperature as Te−1.4+0.2.

TL;DR: The behavior of near-circular orbits in the Earth's gravitational potential is discussed in detail in this paper, where the major axis rotates at a non-uniform rate or oscillates about a position of equilibrium, depending on the initial conditions.

TL;DR: In this paper, shock waves in interplanetary medium caused by sudden expansion of solar corona following a solar flare are reported, which is caused by a sudden expansion in the corona.

TL;DR: The Michelson interferometer has been used for the measurement of temperature in the upper atmosphere as mentioned in this paper, which has been shown to be of the order of a thousand times greater luminosity at the same effective resolution than the Fabry-Perot spectrometer.

TL;DR: In this paper, a year's observations of the N 2 + band (3914 A) at Kitt Peak (latitude 32°) are reported, and it is suggested that the additional ionization is produced by photoelectrons from the magnetic conjugate point.

TL;DR: Adiabatic deceleration effect on cosmic ray spectrum, noting particle momentum and energy change, diffusion coefficient independent of energy, etc as mentioned in this paper, and particle acceleration and energy changes.

TL;DR: In this paper, the effect of the identity of the two nuclei is shown to reduce the rate at which the populations of the hydrogen spin-states is changed by HH collisions by a factor of 1 4.

TL;DR: In this article, the rotational speed of the upper atmosphere, mainly at heights of 200-300 km, is evaluated from the changes in the orbital inclinations of thirteen satellites, at dates between late 1962 and early 1966, i.e. when solar activity was low.

TL;DR: In this paper, the altitude and intensity of the nocturnal green line emission resulting from O2+ recombination were discussed and a simple theory was formulated which predicts the profile of this line.

TL;DR: The spin and orbital decays of the Paddlewheel Satellite Explorer VI have been used in conjunction with several models of surface-particle interaction to calculate drag coefficients and absolute densities at altitudes near 270 km in August of 1959.

TL;DR: In this paper, a simple formula for electron loss from fast excited hydrogen atoms passing through a neutral gas is derived with the aid of the classical impulse approximation, and detailed computations relevant to the quenching of hydrogen line emission in auroras are performed.

TL;DR: In this paper, the intensity of the ionospheric radio absorption observed at several sites in the auroral regions has been related to the magnetic activity, indicated by the planetary index Kp.

TL;DR: In this article, the absorption of solar ionizing radiation during twilight was investigated, and the predicted overhead intensity from fluorescence of the O + ( 2 P 2 D ) lines at 7319-7330 was investigated.

TL;DR: Geomagnetic field variations in temperate zone sporadic E layer according to wind-shear theory were studied in this paper, showing that the E layer was not affected by wind shear.

TL;DR: In this paper, the authors discuss the thermal escape of neutral hydrogen and distribution in Earth thermosphere, noting collision in transition regions, and show that neutral hydrogen is stable in the Earth's upper atmosphere.

TL;DR: A critical examination of Akasofu's hypothesis that large amounts of neutral hydrogen emitted from the Sun may be responsible for the main phase of terrestrial magnetic storms is given in this article.

TL;DR: In this paper, a power spectrum analysis of the intensity variations was performed, and from the ratio between the high frequency content (> 0.25 sec−1) and the low frequency content (< 0.5sec−1), the observed pulsations were divided in three different groups.

TL;DR: Kinetic theory-plasma dynamics theory calculations of magnetospheric solar wind proton velocity distribution as function of particle speed were performed in this paper, where the velocity distribution was defined as a function of the particle speed.

TL;DR: Diurnal variation of hydrogen atom concentration at base of exosphere, including effects of lateral flow of gas around Earth is studied in this paper, showing that hydrogen atom concentrations at the exosphere are relatively stable.

TL;DR: In this article, the Injun III passes over the auroral zone stations of College (L=5.5) and Fort Yukon (L =6.3), Alaska, during January 1963-October 1963, are utilized for a comparison of fluxes of precipitating and trapped electrons with the instantaneous values of broad beam radio absorption at 27.6 Mc/s.