ResearchPaper communications
Optimizing and increasing the reliability in high power supply using TWTA lamps

Peyman Mohammadi; Mehdi Alemi Rostami

Articles in Press, Accepted Manuscript, Available Online from 19 June 2023

Abstract
  One of the most important issues related to the power supply of TWTA lamps in satellites is to have low ripple, high efficiency, high reliability and optimal volume and weight,. In this article, the efficiency and reliability of high voltage DC/DC electronic-power converter is optimized for use in satellite ...  Read More

ResearchPaper space sciences and exploration
Spacecraft Trajectory Design Regarding Van Allen Belts by Honey Bee Optimisation Algorithm

Iman Shafieenejad

Articles in Press, Accepted Manuscript, Available Online from 25 July 2023

Abstract
  The aim of this research is to optimize the trajectory of a low-trust spacecraft carrying biological cargo. Reducing the radiation stresses of the Van Allen belt is the optimal criterion of the optimal control problem of the orbital transfer from the low orbits to the high orbits. Since the minimum radiation ...  Read More

ResearchPaper GPS and navigation GPS)، GLONASS، GALILEO
Physical Initial Flight Alignment For Stabilized Platform Inertial Navigation system Using State Feedback

Seyed Ali Zahiripour

Articles in Press, Accepted Manuscript, Available Online from 29 August 2023

Abstract
  In this article, a method for increasing the accuracy of the initial alignment process of inertial navigation systems with a stable platform is presented through state feedback control in flight mode. In the presented method, the state feedback controller is designed by using the stable plate deviation ...  Read More

ResearchPaper communications
A Reconfigurable and Steerable Horn Antenna Using Plasma Dielectric Slabs for Controllable Gain and Beam Steering

Jaafar Bazrafshan; Fatemeh Sadeghikia; Ali Karami Horestani; Mohamed Himdi

Articles in Press, Accepted Manuscript, Available Online from 25 September 2023

Abstract
  This paper presents a novel approach for designing a reconfigurable and steerable antenna utilizing plasma dielectric slabs along the aperture of a pyramidal horn antenna. The antenna offers electronic control over both the radiation gain and the direction of the main beam. The proposed configuration ...  Read More

ResearchPaper Space subsystems design: (navigation, control, structure and…)
Design for reliability of a space system in the conceptual design phase

hamid reza ali mohamadi; Hassan Naseh

Articles in Press, Accepted Manuscript, Available Online from 25 September 2023

Abstract
  Achieving to new technologies with high reliability, along with reducing the cost and time of the design cycle, is one of the most important challenges in complex systems. In this paper, reliability based design of a space system is discussed in the conceptual design phase. Normally, there are eight ...  Read More

ResearchPaper Space subsystems design: (navigation, control, structure and…)
Design and Fabrication of High gain Array Antenna for Satellite Data Transmission

Arian Zakiani; Seyed Hassan Sedighy; Razieh Narimani

Articles in Press, Accepted Manuscript, Available Online from 01 October 2023

Abstract
  Due to the limited communication time between LEO satellites and the ground station and large volume of satellite image data, it is necessary to establish a high transmission rate connection. Therefore, the use of a high-efficiency satellite antenna is inevitable. In order to use the limited viewing ...  Read More

ResearchPaper space policy
Explaining the Development Strategy of Space Technology Based on the Developing Models of Countries

Hadi Jalili

Articles in Press, Accepted Manuscript, Available Online from 17 October 2023

Abstract
  In this paper, the models of space technology development in regional countries have been studied first, and the main criteria of each of these models have been classified. In this research, by ignoring the leading countries such as USA, Russia, European Union, China, Japan and India, the prominent countries ...  Read More

ResearchPaper Space subsystems design: (navigation, control, structure and…)
Development of an EKF Based Gyro Calibration Method for High-Precision Attitude Estimation

Amir Labibian

Articles in Press, Accepted Manuscript, Available Online from 18 October 2023

Abstract
  IIn high resolution remote sensing satellites, meeting stability and pointing requirements are very crucial in mission’s success. In this regard, usually, very accurate gyroscopes are utilized as one of the main attitude sensors. In order to avoid decreasing attitude estimation accuracies, gyroscopes ...  Read More