Atanas Atanassov - Academia.edu (original) (raw)
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Papers by Atanas Atanassov
Aerospace Research in Bulgaria, 2024
Advances in Space Research, Oct 1, 2014
arXiv (Cornell University), Sep 8, 2012
arXiv (Cornell University), Feb 15, 2010
arXiv (Cornell University), Feb 16, 2010
41st COSPAR Scientific Assembly, Jul 1, 2016
An analytical method is proposed in this work for verification whether an artificial earth satell... more An analytical method is proposed in this work for verification whether an artificial earth satellite during its orbital motion passes over a region of the earth surface. The method is based on undisturbed Keppler’s approximation of the orbit and approximation of the region by a circular segment S. In order to define the situational condition, a conic surface is used with apex in the earth centre, cutting out the circular segment. The tangents of the conical surface with Keppler’s plane determine the time intervals in which the satellite trace on the earth surface occurs inside the segment S. The transformation of these tangents in the plane of Keppler’s orbit and the determination of their crossing points with Keppler’s ellipse lies in the basis of the examined method.
Page 1. International Conference on Computer Systems and Technologies - CompSysTech'2003... more Page 1. International Conference on Computer Systems and Technologies - CompSysTech'2003 - - Approach for Software Realization of Processor for Real Time Control Model of Photometric Systems Complex Atanas Marinov Atanassov ...
arXiv (Cornell University), 2008
The situational analysis lies in the basis of space and ground-based experiment planning. It is c... more The situational analysis lies in the basis of space and ground-based experiment planning. It is connected with the use of complex computation models of environment and with verification of the restricting conditions, due to the character of the conducted experiments and the solved scientific tasks. The present work proposes a formulation of the situational analysis on the basis of the finite abstract automata theory. On this basis, optimization of the situational analysis is suggested by formal schemes for adaptation to the conditions of the model environment. The efficiency enhancement is illustrated by results from the application of the proposed real-time optimization for photometric system control.
arXiv (Cornell University), Jun 4, 2010
arXiv (Cornell University), Feb 11, 2010
An analytical method is proposed in this work for verification whether an artificial earth satell... more An analytical method is proposed in this work for verification whether an artificial earth satellite during its orbital motion passes over a region of the earth surface. The method is based on undisturbed Keppler's approximation of the orbit and approximation of the region by a circular segment S. In order to define the situational condition, a conic surface is used with apex in the earth centre, cutting out the circular segment. The tangents of the conical surface with Keppler's plane determine the time intervals in which the satellite trace on the earth surface occurs inside the segment S. The transformation of these tangents in the plane of Keppler's orbit and the determination of their crossing points with Keppler's ellipse lies in the basis of the examined method.
arXiv (Cornell University), Feb 9, 2010
arXiv (Cornell University), Jun 17, 2010
arXiv (Cornell University), Feb 15, 2010
arXiv (Cornell University), Feb 25, 2010
Advances in Space Research, Nov 1, 2016
Advances in Space Research, Jun 1, 2011
Aerospace Research in Bulgaria, 2024
Advances in Space Research, Oct 1, 2014
arXiv (Cornell University), Sep 8, 2012
arXiv (Cornell University), Feb 15, 2010
arXiv (Cornell University), Feb 16, 2010
41st COSPAR Scientific Assembly, Jul 1, 2016
An analytical method is proposed in this work for verification whether an artificial earth satell... more An analytical method is proposed in this work for verification whether an artificial earth satellite during its orbital motion passes over a region of the earth surface. The method is based on undisturbed Keppler’s approximation of the orbit and approximation of the region by a circular segment S. In order to define the situational condition, a conic surface is used with apex in the earth centre, cutting out the circular segment. The tangents of the conical surface with Keppler’s plane determine the time intervals in which the satellite trace on the earth surface occurs inside the segment S. The transformation of these tangents in the plane of Keppler’s orbit and the determination of their crossing points with Keppler’s ellipse lies in the basis of the examined method.
Page 1. International Conference on Computer Systems and Technologies - CompSysTech'2003... more Page 1. International Conference on Computer Systems and Technologies - CompSysTech'2003 - - Approach for Software Realization of Processor for Real Time Control Model of Photometric Systems Complex Atanas Marinov Atanassov ...
arXiv (Cornell University), 2008
The situational analysis lies in the basis of space and ground-based experiment planning. It is c... more The situational analysis lies in the basis of space and ground-based experiment planning. It is connected with the use of complex computation models of environment and with verification of the restricting conditions, due to the character of the conducted experiments and the solved scientific tasks. The present work proposes a formulation of the situational analysis on the basis of the finite abstract automata theory. On this basis, optimization of the situational analysis is suggested by formal schemes for adaptation to the conditions of the model environment. The efficiency enhancement is illustrated by results from the application of the proposed real-time optimization for photometric system control.
arXiv (Cornell University), Jun 4, 2010
arXiv (Cornell University), Feb 11, 2010
An analytical method is proposed in this work for verification whether an artificial earth satell... more An analytical method is proposed in this work for verification whether an artificial earth satellite during its orbital motion passes over a region of the earth surface. The method is based on undisturbed Keppler's approximation of the orbit and approximation of the region by a circular segment S. In order to define the situational condition, a conic surface is used with apex in the earth centre, cutting out the circular segment. The tangents of the conical surface with Keppler's plane determine the time intervals in which the satellite trace on the earth surface occurs inside the segment S. The transformation of these tangents in the plane of Keppler's orbit and the determination of their crossing points with Keppler's ellipse lies in the basis of the examined method.
arXiv (Cornell University), Feb 9, 2010
arXiv (Cornell University), Jun 17, 2010
arXiv (Cornell University), Feb 15, 2010
arXiv (Cornell University), Feb 25, 2010
Advances in Space Research, Nov 1, 2016
Advances in Space Research, Jun 1, 2011