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Faculty of Sciences
Document Details
Document Type
:
Article In Journal
Document Title
:
Air drag effect on the motion of an artificial earth satellite
Air drag effect on the motion of an artificial earth satellite
Document Language
:
Arabic
Abstract
:
Two methods have been used to compute and compare the perturbations in perigee distance for an artificial Earth satellite. The two methods have used different air density models. The first (Helali, 1987) used the TD model, formulated by Sehnel(1986a), which contains terms that describe all the principal changes of the thermospheric density due to solar activity, geomagnetic activity, and the height. The second method (Davis, 1963) used a model of the density which takes into account the rotation of the atmosphere, the bulging atmosphere and the height. For different values of eccentricities from 0.001 to 0.05 we computed the perturbations Delta P-r in the perigee distance at different heights from 200 to 350 km for both methods. The results show a good agreement for the computed values of Delta P-r for different values of e (0 < e less than or equal to 0.02) in both methods at perigee heights from 250 to 350 km. Meanwhile, for perigee heights smaller than about 250 km we found a maximum difference in Delta P-r amounting to 20 metres/revolution for e = 0.005 and 0.01.
Journal Name
:
EARTH MOON AND PLANETS
Volume
:
73
Issue Number
:
2
Publishing Year
:
1996 AH
Added Date
:
Monday, June 16, 2008
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
ياسين بن محمد أحمد المليكي
Researcher
ymleaky@hotmail.com
حسن بن محمد حسين باصرة
Researcher
hbasurah@hotmail.com
عبدالرحمن بن علي سعيد ملاوي
Researcher
amalawi99@yahoo.com
عدنان بن عبدالله جوهرجي
Researcher
ajoharji@hotmail.com
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