Research Paper Space systems design (spacecraft, satellites, space stations and their equipment)
Two-dimensional numerical simulation of pyrolysis and erosion in a solid rocket motor diverging-converging nozzle

Mohammad Razmjooei; Mohammad Shahbazi; Fathollah Ommi

Volume 14, Issue 2 , June 2021, Pages 1-26

Abstract
  In this paper, the heat transfer and ablation thermal insulators in solid rocket motor are investigated. Therefore, by collecting and solving the thermal ablation equations, a computer program, using MATLAB software, is developed which can predict the thermal response of insulators in different operating ...  Read More

Research Paper Remote sensing
Improvement of the forest canopy density model based on the addition of the FCC index and the average kernel implementation

Masoud Taefi Feijani; Saeed Azadnejad; Masoud Moradi

Volume 14, Issue 2 , June 2021, Pages 27-36

Abstract
  Awareness of the trend of forest canopy density classification requires an operational exact model for forest crown classification. The preliminary challenge is the separation of the forest crown from other non-warlike vegetation coverings. In the following, previous attempts to improve the performance ...  Read More

Research Paper Space systems design (spacecraft, satellites, space stations and their equipment)
Investigation of a Bi-propellant Thruster by a Developed Space Engine’s Thrust Chamber Analysis Code

Masoud EidiAttarZade; Atiyeh SarAbadani; Ghazal Davarnia; Hamed Khosrobeygi; Mohammad Farshchi; Alireza Ramezani

Volume 14, Issue 2 , June 2021, Pages 47-37

Abstract
  Numerical modeling of space engines aside the experimental test is routine. In the design step of such engines, low-cost softwares are vital. In this paper, small-scale space engine thrust chamber analysis code will be developed. In this code, propellant injection and evaporation distribution will be ...  Read More

Research Paper GPS and navigation GPS)، GLONASS، GALILEO
Localization of Aerial Robot Based on Fisheye Cameras in a Virtual Lab

MohammadAli Amiri Atashgah; Seyyed Mohammad-Jafar Tabib

Volume 14, Issue 2 , June 2021, Pages 49-59

Abstract
  This research represents localization of an aerial robot using fisheye cameras on walls in a simulation environment. The virtual testbed in this work is a quadrotor that is simulated in MATLAB Simulink. Subsequently, the simulation outputs as flight records are used in a virtual lab, which is developed ...  Read More

Research Paper Infrastructure (labs, sensors, software,…)
The magnetic cleanliness of a satellite Based on optimum placement of equipment using PSO

Bahman Ghorbani Vaghei; Alireza Shahri Razlighi

Volume 14, Issue 2 , June 2021, Pages 61-69

Abstract
  Magnetometer is one of the most sensors due to its lightness and low power consumption in satellites. Therefore, the magnitude of the magnetic field at the location of the magnetometer should be less than the magnetic cleanliness characteristics defined for the satellite. One of the best solutions is ...  Read More

Research Paper recognition, evaluation, and detection of space radiation
Analysis, Design and Optimization of the Multi Layer Radiation Shielding of Satellite Electronic Components

Kavoos Ghordoyi Milan; Ali Sadr; S. Hasan Sedighy; Hamideh Daneshvar

Volume 14, Issue 2 , June 2021, Pages 71-76

Abstract
  In this paper, multi layer radiation shield is designed for electrons and protons space environments to protect in all satellite orbits. The designed shield layer material and thickness is analyzed and optimized by MCNPX linked with Matlab. In Matlab, genetic algorithm is employed for optimization where ...  Read More

Research Paper Space subsystems design: (navigation, control, structure and…)
Kinematic Modelling Without Singularity and Nonlinear Control of Satellite Attitude Using Direct Adaptive and Fuzzy PD Control Methods

M. Navabi; Nazanin Safaei Hashekvaei

Volume 14, Issue 2 , June 2021, Pages 77-88

Abstract
  Adaptive control technique is taken into consideration because of overcoming the problem of existence of uncertainties in the space missions. In this paper, a novel optimal direct adaptive control technique which is based on Markov parameters is presented. In this technique, the system's performance ...  Read More

Research Paper space law
States' Responsibility to Operate Small Satellites in International Space Law

Hamid Kazemi

Volume 14, Issue 2 , June 2021, Pages 89-102

Abstract
  Many of the space applications that previously required the use of large, complex and expensive satellites have now been made possible by very small satellites due to the development of technology. The applicable international laws and regulations, which typically govern large satellite operations with ...  Read More

Research Paper space sciences and exploration
Determination of the density of scattered spherical data for use in star catalog uniformity

Farshad Somayehee; Amir Ali Nikkhah; Jafar Roshanian

Volume 14, Issue 2 , June 2021, Pages 103-110

Abstract
  In this paper, a new algorithm for determining the density of scattered data at the surface of the sphere is presented and then the proposed algorithm along with Geodesic Weighted K-Means clustering and Deluany triangulation are used to make uniform star catalogs. Comparison of the results with the results ...  Read More