Inversion of the Zodiacal Brightness Integral for an Out-of-Ecliptic Photometer

Dumont, René; Rapaport, M.; Schuerman, D. W.; Levasseur-Regourd, A. C.

doi:10.1016/b978-0-08-023417-5.50084-3

Cited by 8 publications

(5 citation statements)

References 2 publications

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“…An ambitious goal would be to determine the function 7 (ip,(j),r ,6) where ty, $, r are the helio centric longitude, latitude and distance of a random point M with respect to an arbitrary refe rence plane containing the sun (ecliptic or other). Previous results (Dumont et al, 1978 ;Schuerman, 1979) have shown that assuming rotational sym metry, i.e. ruling out the longitude coordinate \p, leads to an inversion formula valid under the con dition that the line-of-sight is in a definite plane, tangent to the or bit.…”

Section: Search For Credible Assumptions Providing More "Invertible" mentioning

confidence: 99%

“…1-c = Rsin e r~Oz/3s) A/£ + Oz/8s) A/ _J/rz A^£ sin(v-£) -Z Af£ sin(v+ef| (5) APPLICATION TO THE DATA OF THE FUTURE "ISPM -ZL" EXPERIMENT In addition to the interest of the special tangent plane pointed out by Dumont et al, 1978, andSchuerman, 1979, a suggested treatment of the data to be obtained in the orbital plane of the OOE spacecraft by the ZL-Experiment (see Schwehm, this volume) will be the following : available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0074180900066493…”

Section: Search For Credible Assumptions Providing More "Invertible" mentioning

confidence: 99%

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Inversion of the Zodiacal Brightness Integral: a new Geometric Approach Suitable for the Out-Of-Ecliptic Zodiacal Light Programme

Dumont¹,

Levasseur-Regourd

1980

Symp. - Int. Astron. Union

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The information provided by measurements of the zodiacal brightness, Z, is discussed as a function of the looking direction, with respect to the velocity vector of the observer through the solar system. In addition to a few directions which allow inversion of the brightness integral completely free of assumptions, it is shown that the orbital plane gives inverting possibilities, based on a single assumption on the heliocentric dependence of the volume scattering efficiency. Important features of the zodiacal cloud distribution, very difficult to obtain from earthbound observations, will easily be derived from the data of the Out-Of-Ecliptic Zodiacal Light Experiment.

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Section: Search For Credible Assumptions Providing More "Invertible" mentioning

confidence: 99%

Section: Search For Credible Assumptions Providing More "Invertible" mentioning

confidence: 99%

Inversion of the Zodiacal Brightness Integral: a new Geometric Approach Suitable for the Out-Of-Ecliptic Zodiacal Light Programme

Dumont¹,

Levasseur-Regourd

1980

Symp. - Int. Astron. Union

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“…En deca de 6 -45°, 0(6) reste mal connue : elle croltrait assez vite quand 6 diminue selon [45](^ 25 pour 6 = 15°), mais cette valeur serait une limite superieure selon Levasseur-Regourd et Dumont [49] qui montrent, autant qu'une incertitude rapidement croissante permette de le dire, qu'il n'y a pas d'indices d'une remontee importante de o jusqu'aux environs de 6 = 15° au moins. Une extension des formules d'inversion utilisees dans I'ecliptique est traitee en vue de la mission "Out-Of-Ecliptic" par Dumont et al [18].…”

Section: Proprietes Optiques Et Essais D'identification Des Grainsunclassified

21. Light of the Night Sky

Dumont¹

1979

Trans. Int. Astron. Union

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L’afflux des résultats, évidemment lié aux techniques spatiales, améne à définir ici de façon plus stricte le champ de la Commission, en continuant d’ailleurs dans la tendance du rapport précédent: le terme “Lumière du Ciel Nocturne” ne s’applique plus qu’aux émissions et diffusions, de l’UV à I’IR, qui recouvrent la sphère cèleste entière. De plus, parmi les composantes telluriques, ne sont prises en consideration que celles dont l’obtention correcte de composantes astronomiques exige la connaissance. Les interpretations sont maintenues, surtout quant aux propriètès optiques des poussieres interplanètaires et interstellaires, mais il n’est plus possible d’inclure, entre autres, les observations non-optiques des grains interplanétaires, leur étude dynamique, ou le rayonnement IR du centre galactique.

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“…Intensities reported for the ecliptic pole cluster around 60 S ] _ o (Dumont 1979) while the ratio of brightness in the ecliptic to that at the same elongation in the helioecliptic meridian (plane containing both Sun and ecliptic pole) is 3.1 to 3.3 for elongations c between 15° and 90° (Weinberg and Sparrow 1978).…”

Section: Observations Near 1 Au (Earth)mentioning

confidence: 99%

“…Here some special directions and the plane determined by the velocity vector and by a vector perpendicular to the helioecliptic meridian as seen by the spacecraft ("inversion plane") are of special interest (Schuerman 1979, Dumont et al 1979 this volume).…”

Section: Figure 2 Principle Of Inversionmentioning

confidence: 99%