Star Catalog Criteria Selection and Mission Catalog Update for a Typical Star Tracker

Jafar Roshanian; Mehdi Hassani; Shabnam Yazdan; Masoud Ebrahimi

Volume 5, Issue 4 , January 2013, Pages 1-8

Abstract
  Star tracker is an attitude determination device which determines the satellite or spacecraft’s attitude using the star position information in inertial and body references. Star information is collected and stored onboard as a “Star or mission catalog”. There are several star catalogs ...  Read More

Software Fault Tolerance Techniques for Dealing with Transient Faults in Satelite Software

Tahereh Broomandnezhad; Mohammad Abdollahi Azgomi; Shahrokh Jalilian

Volume 5, Issue 4 , January 2013, Pages 9-18

Abstract
  Satellite software is a kind of application that are exposed to soft-errors or transient faults because they work in an environment, which is full of radiations. This kind of fault has caused error in the execution of software. Satellite designers have used different methods, such as hardware shielding ...  Read More

Design, Manufacture and Experimental Study of a Hydrogen Peroxide-HTPB Hybrid Rocket Motor

Hojat Ghassemi; Mohammad Nadafi – Pour Meibody; Keyvan Shaabani; Isa Asghari; Ebrahim Zanjirian

Volume 5, Issue 4 , January 2013, Pages 19-28

Abstract
  The application of the hydrogen peroxide as the oxidizer of a HTPB-based prototype hybrid motor is investigated in this paper. First of all, by studying the thermochemical characteristics of the propellant,operation range of different compositions is defined. A prototype hybrid motor is then designed ...  Read More

Satellite Passes Simulation and Calculating the Satellite Rise and Set Times for the Site

Ehsan Daneshnia; Mehrzad Nasirian; S. Mohammad Mahdi Dehghan

Volume 5, Issue 4 , January 2013, Pages 29-38

Abstract
  One of the mostimportant issuesin theproductivityof thesatellites is the mode timingand the automatic writingof thescenarioon-boardof thesatellite with regard environmental conditions. In order to have the capability to make flight scenariosformissionssent fromgroundstationsormissions that aregenerated ...  Read More

Design of an Attitude Control and Power Management System for a Remote Sensing Satellite Considering of Reaction Wheels Saturation Effects

Farhad Fani Saberi; Amir Eslami Mehrjardi

Volume 5, Issue 4 , January 2013, Pages 39-45

Abstract
  In this paper we are going to design an attitude control system for a Stereo-Imaging Remote Sensing Satellite using of four pyramidal reaction wheels. In this method, in order to provide the power requirements of the satellite by the energy stored in the reaction wheels, a power management law will be ...  Read More

Collision-Free Control for Multiple Satellites via Formation Feedback of Virtual Structure

Mohammad Saberi-Tavakoli; Fariborz Saghafi

Volume 5, Issue 4 , January 2013, Pages 47-60

Abstract
  This paper has tried to control for multiple satellite formation flight under a method called Virtual structure. First the algorithm was implemented in the reference coordinate system has no gradient and then we have developed the same algorithm for a circular orbit around the earth within a set of satellites ...  Read More

Attitude Stability Testing of an Agile Satellite Simulator with Single-Gimbal Control-Momentum-Gyros

Alireza Aghalari; Javad Tayebi; Ahmad Kalhor

Volume 5, Issue 4 , January 2013, Pages 61-68

Abstract
  Recently, many space missions have been using small satellites, because small satellites are easier and faster to develop and thereby, provide increased launch opportunities. Some of these missions include tasks that required agile maneuvers. In this paper, attitude stability testing of an agile three-degree-freedom ...  Read More

Designing and Evaluation of an Experimental Attitude Determination System Using Sun Sensor and Magnetometer

Amir Hosein Tavakkoli; Masoud Yazdanian; Yarollah Koolivand; Morteza Shahravi; Morad Momeni; S. Mohammad Mahdi Dehghan

Volume 5, Issue 4 , January 2013, Pages 69-78

Abstract
  Evaluation of the satellite attitude determination system is very complicate because of need to simulate space environment on the ground. In this paper a laboratory Implementation of attitude estimation using sun sensor and magnetometer is reported. The test setup includes a sun simulator installed in ...  Read More