Research Paper
Space Launch System Family Technology Development Model from Propulsion Aspect with Cost Approach

Hasan Naseh

Volume 9, Issue 4 , April 2017, Pages 1-12

Abstract
  The major purpose of this paper is to present Space Launch System (SLS) family technology development from propulsion system aspect. Thus, the models of cost estimation for two types of propulsion systems (cryogenic and semi-cryogenic) are derived based on the statistical method and are then compared ...  Read More

Research Paper
Optimal Trajectory Design of an Upper Stage for Satellite Injection into Geostationary Orbit Using Limited Thrust

Mojtaba Alavi pour; Amir Ali Nikkhah; Jafar Roshanian

Volume 9, Issue 4 , April 2017, Pages 13-25

Abstract
  In this research, the problem of optimal trajectory design of an upper stage is considered for satellite injection into Geostationary orbit in 3-Dimensional space. The optimal multi-burn trajectory is obtained based on Euler-Lagrange theory with minimum fuel consumption criteria. Instead of using switch ...  Read More

Research Paper
Role of States in Regulating Space Activities in International Law

H. Kazemi; Ali Akbar Golro

Volume 9, Issue 4 , April 2017, Pages 27-37

Abstract
  International regulations consist of rights and obligations of states in relation to space. States should respect the international obligations with all of their public and private sectors. Based on the 1967 outer space treaty, states should control and monitor natural and legal persons involved in space ...  Read More

Research Paper
Integrated Guidance and Control Design by Combining Backstepping and Sliding Mode Control Methods

Reza Yavari; Iman Mohammadzaman; Mohammad Reza Arvan

Volume 9, Issue 4 , April 2017, Pages 39-50

Abstract
  In this paper, a novel integrated guidance and control (IGC) approach is designed using the combination of backstepping and sliding mode control methods. In contrast to the traditional methods combining the kinematic and dynamic equations and deriving a state space model as an integrated unit model, ...  Read More

Research Paper
Reduce Position and Velocity RMS Error of Non-linear Filters in LEO Satellite Radar Tracking

Javad Salem; hossein pilaram; seyyed mohammad alavi

Volume 9, Issue 4 , April 2017, Pages 51-63

Abstract
  For the detection of and tracking thelow earth orbit Satellites (LEO), there are different methods such as optic, laser and radar tracking, among which radar tracking is the best. Since the common linear tracking filters deployed in available radars are not able to estimate the position of the non-linear ...  Read More

Research Paper
The Effects of Simulated Microgravity on Serum Levels of VEGF in Male Wistar Rats

Vahid Nikbakht; Ali Kazemi; Zahra Hajebrahimi; Neda Khaledi; Mohammad Asadi golzar

Volume 9, Issue 4 , April 2017, Pages 63-68

Abstract
  Endothelial cells differently respond to microgravity condition. The evolution of these responses leads to a more clear understanding of cardiovascular diseases in both gravity and micro-gravity conditions. The aim of this study was to investigate the effects of microgravity condition on serum levels ...  Read More