Geophysics

1511 Submissions

[11] viXra:1511.0282 [pdf] submitted on 2015-11-29 13:28:51

The Stereographic Projection

Authors: Abdelmajid Ben Hadj Salem
Comments: 10 Pages. In French.

The paper concerns the streographic projection or mapping. Its proprieties are described.
Category: Geophysics

[10] viXra:1511.0274 [pdf] submitted on 2015-11-28 13:07:15

Détermination D'un Géoide de Haute Précision Par L'approche D'a. Ardalan I: Rappels de la Théorie de Pizzetti-Somigliana

Authors: Abdelmajid Ben Hadj Salem
Comments: 12 Pages. In French.

This paper gives a rappel of the theory of Pizzetti-Somigliana for the determination of a geoid. It is the first part of an investigation to use the approch of A. Ardalan for the calcul of a regional géoid of high resolution to determine a tunisian geoid.
Category: Geophysics

[9] viXra:1511.0253 [pdf] submitted on 2015-11-26 04:31:56

Combinaison of Doppler and Terrestrial Observations in the Adjustment of Geodetic Networks

Authors: Abdelmajid Ben Hadj Salem
Comments: 129 Pages. It is my graduate thesis(numerical version) submitted in October 1986 to obtain the Diploma of "Ingénieur Civil Géographe", ENSG, IGN France. In French.

The investigation concerns the combination of Doppler data and terrestrial classical observations for the adjustment of geodetic networks and the determination of the 7 parameters (translation, rotation and scale) between terrestrial geodetic and Doppler networks. Models of adjustment are presented. They are part of two groups : 1- a combined adjustment, 2- a commun adjustment. Bursa-Wolf’s model and Molodensky formulas are used to determine the parameters. Systematic errors in orientation and scale of geodetic terrestrial networks are studied.
Category: Geophysics

[8] viXra:1511.0231 [pdf] replaced on 2016-01-28 11:33:59

The Second Structure of Constant Current

Authors: Solomon I. Khmelnik
Comments: 12 Pages.

Here we explore the structure of DC and the flow of electromagnetic energy in a wire. We show that the flow of electromagnetic energy is spreading inside the wire along a spiral. For a constant current value the density of spiral trajectory decreases with decreasing remaining load resistivity.
Category: Geophysics

[7] viXra:1511.0224 [pdf] submitted on 2015-11-23 10:09:23

Analyse de Structure D'un Réseau Géodésique de Base:aspect Tridimensionnel

Authors: Abdelmajid Ben Hadj Salem
Comments: 10 Pages. In French.

Cette étude permettra d'analyser les fondements d'un réseau géodésique de base ou primordial et de comparer les déformations que subit le réseau en des points séparés par de longues distances.
Category: Geophysics

[6] viXra:1511.0219 [pdf] submitted on 2015-11-23 01:51:30

Cours de Cartographie Mathématique et Les Transformations de Passage Entre Les Systèmes Géodésiques

Authors: Abdelmajid Ben Hadj Salem
Comments: 86 Pages. in French, with an index.

A course of mathematical cartography and transformations between geodetic systems, given to the students of Geomatic department of the ESAT school, the first semester of 2015.
Category: Geophysics

[5] viXra:1511.0174 [pdf] submitted on 2015-11-20 03:27:09

Note Sur la Méthode Des Référentiels Inverses Régionaux en Géodésie

Authors: Abdelmajid Ben Hadj Salem
Comments: 9 Pages. In French

In this paper, a review of the regional inverse referential is presented with application on geodesy for the determination of the parameters of the passage from a geodetic system to another. An numerical exemple is also given.
Category: Geophysics

[4] viXra:1511.0131 [pdf] submitted on 2015-11-16 05:05:07

Eléments de Géodésie et de la Théorie Des Moindres Carrés

Authors: Abdelmajid Ben Hadj Salem
Comments: 390 Pages. In French.

It is a preliminary version of a book on " Geodesy and the Theory of Least Squares". The book contains two parts. The first part is about geomtric and spatial geodesy. The second part concerns the theory of errors of least squares, we give an idea of the theory when we use non-linear models.
Category: Geophysics

[3] viXra:1511.0062 [pdf] submitted on 2015-11-07 14:02:13

Traduction of the paper "Equilibrium Figures In Geodesy And Geophysics" of Helmut Mortiz (1988)

Authors: Abdelmajid Ben Hadj Salem
Comments: 36 Pages. In French.

Ce papier représente la traduction de la communication du Professeur Helmut Moritz (1988) intitulée " Equilibrium Figures In Geodesy And Geophysics". Il étudie le problème des figures d'équilibre hydrostatique terrestre. L'auteur passe en revue les publications à ce sujet.
Category: Geophysics

[2] viXra:1511.0061 [pdf] submitted on 2015-11-07 11:28:09

Calcul Des Lignes Géodésiques de L'ellipsoide de Révolution

Authors: Abdelmajid Ben Hadj Salem
Comments: 12 Pages.

Après avoir défini les lignes géodésiques d'une surface, on établit les équations des géodésiques pour une surface donnée. Comme application, nous détaillons celles de l'ellipsoïde de révolution. On fera l'intégration de ces équations.
Category: Geophysics

[1] viXra:1511.0010 [pdf] submitted on 2015-11-01 23:55:28

Nonlinear Analysis in Satellite Imagery of India

Authors: Sai Venkatesh Balasubramanian
Comments: 7 Pages.

The development of Satellite Imagery and associated analysis has opened up avenues in applications as diverse as meteorology, navigation, warfare and biodiversity. Motivated by this trend, the present article explores the application of nonlinear analysis tools such as entropy and fractal dimension in satellite imagery of the 29 states of India. It is seen that sharp and rich variations in terrain from green to arid or snow-clad mountainous regions contribute to high entropy, while rich variations in borders and varying scales of vegetation patches correspond to high fractal dimensions. The results obtained thus illustrate the significance and relevance of nonlinear analysis tools such as entropy and fractal dimension in satellite imagery.
Category: Geophysics