ResearchPaper Space subsystems design: (navigation, control, structure and…)
Miss Distance analysis of First-Order Explicit Guidance Law with/without radome effect

Amirhossein Mirzaei; S. Hamid Jalali Naieni; Ali Arabian Arani

Volume 15, Issue 4 , January 2023, Pages 1-19

  The miss distance analysis of the first-order explicit guidance law (EGL) is carried out using linearized equation of motion in the normalized form in order to obtain normalized miss distance curves. The initial heading error, constant target, acceleration limit, radome refraction error, and fifth-order ...  Read More

ResearchPaper Space systems design (spacecraft, satellites, space stations and their equipment)
Effects of Injector Pressure Drop on the Performance of a Monopropellant Hydrazine Thruster

Alireza Rajabi; Noordin Qadiri Massoom; Mohammadali Amirifar; Seyyed Rashad Rouholamini; Pouria Mikaniki; Mohammad Ghorbi; Majid Kamranifar

Volume 15, Issue 4 , January 2023, Pages 21-32

  The effects of injector pressure drop on the performance of a catalytic reactor are studied experimentally. The injectors were simple orifices. Dynamic interactions between the injector and the reactor determine the transient behavior of the system. Results showed that the injector pressure drop affected ...  Read More

ResearchPaper Space New Technologies
A Method for Determining Design Parameters of Space Umbrella Antenna

Sadjad Samipour; Alireza Toloui; Vladimir Batrakoff

Volume 15, Issue 4 , January 2023, Pages 33-45

  Development in the aerospace industry is linked to the continuous pursuit of lightweight designs. Open-architecture composite structures are a new and novel use of composites for minimal-weight component design. It is reasonable to use efficient and advanced techniques such as radial braiding in the ...  Read More

ResearchPaper Space Ground Segment: receiving, transmitting, controlling and data processing
Design and Implementation of Transparent Pseudo-Noise Satellite Ranging Relay

Afshin Eskandari; S. Hassan Sedighi

Volume 15, Issue 4 , January 2023, Pages 47-58

  In this paper, Design, optimization, and implementation of a Transparent Pseudo-Noise satellite Ranging relay are presented. CCSDS and DSN standards were studied for requirements of on board hardware for LEO satellites and ground station. To optimize the performance of the relay, a ground station for ...  Read More

ResearchPaper space law
Military use and arms race in space from the perspective of international law

Negar Mofakham Naser Eslami; Ahmad Momeni rad; Seyed Ahmad Tabatabai

Volume 15, Issue 4 , January 2023, Pages 59-73

  Today, one of the main concerns of the Committee for the Peaceful Use of Outer Space (COPUOS) and its subcommittees is the issue of militarization in space law. Top space countries such as the United States, Russia and China have added to this concern by using advanced space military equipment. Therefore, ...  Read More

ResearchPaper communications
Extensive Regional Telecommunications Coverage in Emergency Condition using Satellite and Tethered-Balloon Equipped with Antenna Pointing Mechanism – Part 2: Operation Modes and Controller Design

Javad Ranjbar; Mohammad Fathi

Volume 15, Issue 4 , January 2023, Pages 75-93

  In this paper, in order to provide telecommunication coverage for a wide geographical area, the use of a network consisting of an LEO satellite and a Tethered-Balloon equipped with antenna pointing mechanism is proposed. The proposed telecommunication network is able to send the collected data to a mission ...  Read More

ResearchPaper physiology and space medicine (astrobiology)
Study of the effect of the microgravity on the expression of angiogenesis marker in endothelial progenitor cells

Vajihe Zarrinpour; Zahrs Hajebrahimi

Volume 15, Issue 4 , January 2023, Pages 95-101

  A study of the effect of microgravity on the endothelial progenitor cells is useful both in understanding cardiac changes in astronauts and in using microgravity as angiogenic stimuli. The aim of the present study was to investigate the effect of microgravity on VEGFR-2 and CD34 angiogenesis markers. ...  Read More

ResearchPaper physiology and space medicine (astrobiology)
Heterologous Expression of Shiga-Like Toxin Type 2 in Microgravity Condition

Maryam Salavatifar; Nilofar Mosallaei; Ali Hatef Salmanian

Volume 15, Issue 4 , January 2023, Pages 103-113

  Gravity is an influential force on living organisms on earth, including microorganisms. E. coli O157: H7 causes complications such as bloody diarrhea and hemolytic uremic syndrome in humans and immunization is the main way to fight it. Subunit B of Shiga-like toxin type 2 (STX2B), binding agent of bacterial ...  Read More

ResearchPaper Space Science and Technology
Numerical study on the effects of nozzle geometry and creating swirly flow inside the injector nozzle on the performance of an engine

Amirhamzeh Farajollahi; Reza Firuzi; Mohammad Reza Salimi; Mohsen Rostami

Volume 15, Issue 4 , January 2023, Pages 115-130

  In this study, the effects of geometry and spiral rifling like guides inside the injection nozzle on the performance of an engine are investigated, using AVL Fire software. To do so, firstly injectors with different nozzle geometries and their resultant spray patterns were simulated. Numerical results ...  Read More