Sensors and actuators of the ALSAT-1 first algerian low earth orbit observation microsatellie in orbit
Cet article présente le contrôle d'altitude et d'orbite du premier microsatellite algérien d'observation de la terre ALSAT-1. Les détecteurs d'altitude utilisés ont été le magnétomètre, le capteur solaire, les actionneurs qui sont les roues de
Atlas ; Earth atmosphere ; Orbit ; Planets ; Scientific program ; Space ; Space shuttle
3 parties: 1) présentation du milieu spatial, des orbites, de l'occupation de l'espace, des traces au sol; 2) infrastructure économique et technique: bases spatiales, lanceurs et navettes, organisation politique et aspects économiques; 3) domaines
d'application: les missions scientifiques circumterrestres, exploration hors des orbites géocentriques, l'observation de la terre, les télécommunications et la localisation.
Pacific sea surface temperature forcing dominates orbital forcing of the Early Holocene monsoon
In this study, a comparison is made between orbital forcing and Pacific sea surface temperature (SST) forcing of the monsoon through a sequence of atmospheric general circulation model experiments configured for 6,000 and 9,000 yr B.P. The results
imply that SSTs are potentially as important as orbital parameters in governing the monsoon and that more data , particularly from the equatorial Pacific, are crucial to deciphering Holocene climate.
Age dating and the orbital theory of the ice ages : development of a high-resolution 0 to 300,000-year chronostratigraphy
Using the concept of orbital tuning , a continuous, high-resolution deep-sea chronostratigraphy has been developed spanning the last 300,000 yr. The chronology is developed using a stacked oxygen-isotope stratigraphy and four different orbital
Un modèle mathématique de bilan énergétique vérifie la théorie astronomique de Milankovitch, selon laquelle les fluctuations glaciaires pléistocènes auraient constitué la réponse du climat aux variations séculaires de différents éléments de l'orbite
Background to the Soviet glaciological studies from the Salyut-6 orbital space station
The A. provides background information on the Soviet Orbital Space Station Earth Observations Project , comparing it with the American Space Shuttle Earth Observations Project . He also provides details on the cameras need by the Soviet cosmonauts
The response of northern extratropical climate and vegetation to orbitally induced changes in insolation during the last interglaciation
This paper presents Atmospheric General Circulation Model (AGCM) simulations of the effect of orbital variations on northern hemisphere extratropical climates. The goal is to use these simulations to help explain observed paleoenvironmental changes
during the last interglaciation. The simulations are offered as sensitivity studies, i.e., the AA. focus on the effects of orbital variations and do not consider the possible further effects of other climatic controls such as atmospheric CO2. Simulated
Three central Arctic Ocean sediment cores were sampled for percentage carbonate, number of foraminifera, and texture. These three parameters were used in spectral analyses to test the idea that the ice-covered Arctic Ocean may respond to orbital
signal confirms that, in spite of ice feedback, the Arctic Ocean has responded to orbital forcing in much the same manner as have ice-free oceans.
Response of a zonal climate-ice sheet model to the orbital perturbations during the Quaternary ice ages
Utilisation d'un modèle climatique relativement simple pour tester la théorie astronomique de Milankovitch. Les variations des éléments de l'orbite terrestre peuvent effectivement expliquer les oscillations secondaires, d'amplitude réduite, qui
The earth's seasonal cycle of insolation, determined by orbital geometry, governs the seasonal cycle of surface temperature. The insolation is zonally symmetric, but the asymmetric land-sea distribution results in a seasonal temperature cycle
with distinct zonal asymmetries. This geographical filtering of the seasonal insolation is of interest in paleoclimate studies because perturbations in insolation, caused by variations in earth's orbital configuration, have been linked to climate fluctuations.
Analyse multivariée ; Corrélation ; Eruption volcanique ; Globe terrestre ; Géomorphogenèse ; Modèle stochastique ; Mouvement orbital ; Séisme ; Série chronologique
Essai pour analyser les séries temporelles des processus volcaniques et sismologiques de formation du relief en relation avec les paramètres du mouvement orbital de la Terre.
Monitoring environmental resources through NOAA's polar orbiting satellites in Remote sensing for resources development and environmental management. Volume 3.