Research Paper Space systems design (spacecraft, satellites, space stations and their equipment)
Maximum Likelihood-Based Worst-Case Optimization Design of Hydrazine Propulsion System for aSatellite Orbital Transfer System under Uncertainty

Alireza Toloei; Mohammad Fatehi; Behrooz Keshtegar

Volume 14, Issue 3 , September 2021, Pages 1-14

Abstract
  In this paper, a design of a hydrazine monopropellant system is proposed based on the maximum likelihood for the presentation of uncertainties, without any specific assumptions about the type of distribution and even uncertainty in distribution parameters by the johnson distributions family. The maximum ...  Read More

Research Paper Space subsystems design: (navigation, control, structure and…)
The Turbulence Model in the Spacecraft by using A Moving Pulsed Ball Model

M. Navabi; Ahmad Ebrahimi

Volume 14, Issue 3 , September 2021, Pages 15-22

Abstract
  Turbulence in the spacecraft tanks has undesirable effects during maneuvers. Therefore, considering the importance of the correct orbit maneuver to reach the target orbit, it is necessary to model and select a proper method to control it before performing the orbital maneuvers. In this paper, by using ...  Read More

Research Paper Remote sensing
A method for determining the optimum parameter of the soft filters to image fusion in the frequency domain

Kobra Yaghoubi; Alireza Safdarinezhad; Marzieh Jafari

Volume 14, Issue 3 , September 2021, Pages 23-37

Abstract
  Image fusion is known as a synergetic process for merging multispectral and panchromatic images contents. So far, various methods have been developed in which the usage of the frequency domain is one of them. The frequency-based image fusion techniques are performed using high and low pass filters. So, ...  Read More

Research Paper Space systems design (spacecraft, satellites, space stations and their equipment)
Applying a Novel Comprehensive Preference-based Design (CPD) Approach to Conceptual Design of Space Transportation System

Hojat Taei; Mahmood Haghighat Esfahani; Sajjad Yadegari Dehkordi

Volume 14, Issue 3 , September 2021, Pages 39-50

Abstract
  In this paper, a novel Comprehensive Preference-based Design (CPD) approach is presented which attempts to achieve subjective attributes that are defined in the concept of maximization of designer/customer's satisfaction in addition to objective goals which are formulated in the form of minimization ...  Read More

Research Paper Space subsystems design: (navigation, control, structure and…)
Dynamic and Stability Analysis of a Cracked Rotating Flexible Beam

Milad َAzimi; Samad Moradi

Volume 14, Issue 3 , September 2021, Pages 51-63

Abstract
  The free and forced vibration analysis of a rotating large flexible structure with a single crack is investigated using the Homotopy Perturbation Method (HPM). The crack is modeled with a torsional spring element on a structure that follows the Euler-Bernoulli theory. The nonlinear equations of motion ...  Read More

Research Paper Space systems design (spacecraft, satellites, space stations and their equipment)
Usinge The qEKF Algorithm for Satellite Attitude Estimation with Two Magnetometer & Sun Sensors

Abbas Saeidi; Nasser Rahbar; Mohammad Ali Alirezapouri

Volume 14, Issue 3 , September 2021, Pages 65-73

Abstract
  In recent years, according to progress of aerospace industries particularly satellites it has been paying much attention to attitude determination of satellite. Attitude determination of satellite in various ways, such as: radio, radar, optical methods and using GPS, q and kalman filter is done, that ...  Read More

Research Paper GPS and navigation GPS)، GLONASS، GALILEO
Inertial navigation position error estimation, using vision system

Mohsen Shamirzaei; Mehran Mir Shams

Volume 14, Issue 3 , September 2021, Pages 75-90

Abstract
  The main task of the study is to estimate the position error in an inertial navigation system by integrating it with the visual system. The case study is a spacecraft that must accurately measure its position relative to a predetermined landing point. The spacecraft is assumed to be augmented GNSS navigation. ...  Read More

Research Paper Remote sensing
SAR Ground Moving Target Imaging based on Sparse Representation

S. Andishe Moezzi; Mohamad Ali Masnadi-Shirazi

Volume 14, Issue 3 , September 2021, Pages 91-100

Abstract
  synthetic aperture radar (SAR) for ground moving target indication (GMTI) and imaging (GMTIm) have been gaining increasing interests for both civilian and military applications. Because SAR is generally designed for imaging a stationary scene, the SAR image of a moving target will be both displaced and ...  Read More

Research Paper Remote sensing
Kinematic Standard Point Positioning (SPP) based on Kalman Filter and C/A Code Observations Under Intense Geomagnetic Storm Conditions

Fereydon Nobakht Orsi; Abdolreza Safari; Amir Khodabandeh

Volume 14, Issue 3 , September 2021, Pages 101-108

Abstract
  In this paper, we discussed standard point positioning technique based on the single frequency code-based (C/A) receivers. Then, we presented its performance by means of different measures. However, the use of one single frequency GPS receiver to obtain high-precision positioning make a major challenge ...  Read More