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Diana W. Scott

Bio: Diana W. Scott is an academic researcher from Royal Aircraft Establishment. The author has contributed to research in topics: Atmosphere & Harmonics. The author has an hindex of 11, co-authored 22 publications receiving 328 citations.

Papers
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TL;DR: In this paper, the authors developed the theory for orbits of eccentricity less than 0.2 with a more realistic atmospheric model in which H varies linearly with height y: it is assumed that μ = dH/dy is less than 2.2.

42 citations

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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.

40 citations

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TL;DR: In this article, the odd zonal harmonics in the Earth's gravitational potential were evaluated by analysing the variations in orbital eccentricity of 22 satellites, chosen to give the widest and most uniform possible distribution in semi major axis and inclination.

37 citations

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TL;DR: In this paper, the density of the upper atmosphere at heights between 1080 and 1170 km is evaluated from the change in the orbital period of Echo 2 for dates between February 1964 and December 1965.

27 citations

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TL;DR: In this paper, the odd zonal harmonics in the Earth's gravitational potential were determined by analysing the changes in the eccentricities of six satellites having orbital inclinations spaced as uniformly as possible between 28° and 96°.

27 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, a generalized form of the cross-validation criterion is applied to the choice and assessment of prediction using the data-analytic concept of a prescription, and examples used to illustrate the application are drawn from the problem areas of univariate estimation, linear regression and analysis of variance.
Abstract: SUMMARY A generalized form of the cross-validation criterion is applied to the choice and assessment of prediction using the data-analytic concept of a prescription. The examples used to illustrate the application are drawn from the problem areas of univariate estimation, linear regression and analysis of variance.

7,385 citations

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TL;DR: In this paper, the authors developed equations describing the time evolution of the equatorial ionosphere using flux tube integrated and flux tube weighted quantities, which model the chemistry, dynamics, and electrodynamics of the EI. The resulting two-dimensional set of equations can be used to investigate equatorial electric fields neglecting small-scale phenomena.
Abstract: Companion papers in this series present (1) the role of equatorial E region postsunset ionosphere, (2) the origin of horizontal plasma shear flow in the postsunset equatorial ionosphere (this paper), (3) the Coloured Bubbles experiments results, and (4) computer simulations of artificial initiation of plasma density depletions (bubbles) in the equatorial ionosphere. Within this paper, equations describing the time evolution of the equatorial ionosphere are developed using flux tube integrated and flux tube weighted quantities which model the chemistry, dynamics, and electrodynamics of the equatorial ionosphere. The resulting two-dimensional set of equations can be used to investigate equatorial electric fields neglecting small-scale phenomena (λ < 1 km). An immediate result derived from the integrated current equations is an equation describing the physics of the shear in the horizontal flow of the equatorial plasma during the evening hours. The profile of the horizontal flow has three important contributing terms relating to the neutral wind dynamo, Hall conduction, and the equatorial electrojet current divergence. Using a one-dimensional model of the velocity shear equation and the integrated ionospheric transport equations, a time history of the development of the shear feature during the postsunset hours is presented. The one-dimensional model results are compared to the velocity shear measurements from the Coloured Bubbles experiments.

226 citations

Journal ArticleDOI
TL;DR: In this article, six solutions for tesseral harmonic coefficients of geopotential from satellite determinations compared with gravimetry were proposed. But none of them considered the effect of satellite data.
Abstract: Six solutions for tesseral harmonic coefficients of geopotential from satellite determinations compared with gravimetry

118 citations

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TL;DR: The longitude-dependent part of the geopotential can give rise to significant changes in inclination for a close satellite when its mean motion is commensurable with the Earth's rotation as mentioned in this paper.

88 citations

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TL;DR: In this article, the frequency spectra of signals incoherently scattered by ionospheric electrons often reveal slight shifts caused by macroscopic motions of the ions, and suggest means by which the utility of the incoherent scatter technique could be exploited further.

86 citations