Josué Cardoso dos Santos

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• PhD
• Professor (Assistant) at University of Colorado Colorado Springs

Solar sails are a type of propulsion that uses solar radiation pressure to generate acceleration. The fundamental goal for any solar sail design is to provide a large and flat reflective film which requires a minimum of structural support mass. This research takes into account the non-sphericity of the central body, the perturbation of the third bo...

The present paper studies the lifetime of orbits around a moon that is in orbit around its mother planet. In the context of the inner restricted three-body problem, the dynamical model considered in the present study uses the double-averaged dynamics of a spacecraft moving around a moon under the gravitational pulling of a disturbing third body in...

The purpose of the present study is to test two recently proposed integrable models to study the roto-orbital motion of an axisymmetric rigid body, considering this body under the influence of a central gravitational field. Based on the concept of intermediary, both models are treated in Hamiltonian formalism, as perturbation of the Keplerian–Euler...

Quasi-satellite orbits are of great interest for the exploration of planetary moons because of their dynamical features and close proximity with respect to the surface of scientifically relevant objects like Phobos and Deimos. This paper explores the equations of the elliptical Hill problem, offering a new analytical insight into the long-term evol...

This paper address the past and current efforts of the South American region in the space area. The space activities in the region date back to 1967, and since then South American countries have achieved a relative modest capability through their national programs and sometimes international collaboration, with the space activities in the region le...

Space sails are a continuum of lightweight, thin, large-area, deployable technologies which are pushing forward new frontiers in space mobility and exploration. They encompass solar sails, laser-driven sails, drag sails, magnetic sails, electric sails, deployable membrane reflectors, deployable membrane antennas, and solar power sails. Some have be...

Space sails are a continuum of lightweight, thin, large-area, deployable technologies which are pushing forward new frontiers in space mobility and exploration. They encompass solar sails, laser-driven sails, drag sails, magnetic sails, electric sails, deployable membrane reflectors, deployable membrane antennas, and solar power sails. This databas...

In the Circular Restricted Three-Body Problem (CR3BP), a conserved quantity known as the Jacobi integral defines the zero-velocity curves. However, when considering perturbations such as the pulsation of the Earth-Moon distance and solar gravity, the Jacobi integral-typically constant in the CR3BP-begins to vary over time, leading to a correspondin...

This work deals with the modeling and analysis of different disturbing forces acting over the trajectory of a spacecraft with a low-thrust acceleration model using Fourier Series expansion and differential equations of motion with singularities removed by adoption of equinoctial orbital variables. The focus of the analysis is to present a discussin...

Several non-functional objects are orbiting around the Earth and they are called space debris. In this work, we investigate the process of space debris mitigation from the GEO region using a solar sail. The acceleration induced by the solar radiation pressure (SRP) is the most relevant perturbation for objects in orbit around the Earth with a high...

The present work intends to analyze the type of dynamics under which the spiral trajectory phase of the DESTINY+ mission will evolve considering gravitational perturbations from Earth. The type of motion involved in this phase of the mission deal the continuous raising altitude low-thrust trajectory which will depart from the Earth towards the Moon...

The use of CubeSats is increasing to a wide range of areas in science and technology with some of them requiring an accurate Attitude Determination and Control System (ADCS) and deployable structures such as booms. However, small satellites commonly do not have latching systems to lock their booms, which introduce vibrations and oscillations and mi...

Spacecraft formation flying is a key technology for complex space missions. The main goal of this study is to analyze how the nonlinearities of satellite's actuators and sensors can interfere in a formation flying mission. Simulations were performed varying the sensor's bias and noise as well as a constant of time and time delay of actuators. Resul...

The Moon is considered essential to unlock the evolutionary history of the planets because it preserves a surface record that covers most of the history of the solar system and is easily accessible from the Earth. It is also a key celestial body when one thinks of human exploration of the Solar System and its resources. Among the best methods avail...

The present work intends to analyze the gravitational dynamics under which a formation flying mission as the one proposed by the ITASAT-2 project is subjected. The type of dynamics analyzed here and involving this type of mission considers a low-altitude orbit for the spacecraft and with significant disturbing effects coming from the Earth's irregu...

Este trabalho apresenta uma revisão bibliográfica de alguns dos principais temas referentes a Formações em Voo (FV) de veículos espaciais. São apresentados os diferentes tipos de modelos de dinâmica relativa utilizados para a simulação de FV's, em conjunto com as metodologias de coordenação e topologias de formação comumente utilizadas além de dife...

"A pressão de radiação solar (PRS) é a perturbação mais relevante para objetos com grande razão área massa (A/m). Neste trabalho, desenvolvemos a equação da PRS considerando o modelo de média simples com o Sol em órbita elı́ptica e inclinada. É analisado a evolução orbital de detritos espaciais levando em conta o achatamento da Terra, a perturbação...

The present work presents a test of two Hamiltonians that produce integrable models recently proposed to study the roto-orbital motion of an axisymmetric rigid body in motion under a central gravitational field. The dynamics assumed here is approached by the motion of an axisymmetric rigid body orbiting another massive spherical one. Based on the c...

The Martian Moons eXploration mission is currently under development at JAXA and will be the first spacecraft mission to retrieve pristine samples from the surface of Phobos. In preparation for the sampling operations, MMX will collect observations of Phobos from stable retrograde relative trajectories also known as quasi-satellite orbits or QSOs....

This paper addresses the past and current efforts of the South American region in space. Space activities in the region date back to 1961; since then, South American countries have achieved a relatively modest capability through their national programs, and some international collaboration, with space activities in the region led primarily by the B...

The Near-Earth Asteroid Characterization and Observation (NEACO) mission proposes to explore the fast-rotating asteroid (469219) 2016 HO3 with a SmallSat spacecraft and perform an early scientific investigation to enable future, more indepth missions. The NEACO spacecraft is equipped with a low-thrust, solar electric propulsion system to reach its...

In this research, an analysis of the orbital eccentricity of an artificial satellite in motion around different small bodies of the solar system is performed. It is considered the disturbing effect due to some terms of the gravity potential related to the irregular shape of the central body. Emphasis is given on the impact caused by the C22 sectori...

The Near-Earth Asteroid Characterization and Observation (NEACO) mission proposes to explore the fast-rotating asteroid (469219) 2016 HO3 with a SmallSat spacecraft and perform an early scientific investigation to enable future, more indepth missions. The NEACO spacecraft is equipped with a low-thrust, solar electric propulsion system to reach its...

Several scientific missions have been proposed for a deeper exploration of planetary systems. These missions require a lot of specialized techniques in order to reach a better understanding of the dynamics involved in their planning. In order to help to get important features about each system under study, the present study proposes to use differen...

A classical subject of research in celestial mechanics is the study of the motion of celestial bodies under the influence of non Keplerian gravitational fields. This type of research has become important in planning future space missions that intend to send spacecrafts to orbits around planetary moons. Due to its special characteristics, some of th...

Space missions intending to visit Europa, one of the famous Galilean's moons of Jupiter, are among the most important topics in space activities today. There is an increasing interest in the scientific community to send spacecrafts to be inserted into Europa's orbit, with goals like mapping its surface and gravitational field. From the quality of t...

Several missions that propose to explore systems of planetary moons will require high-inclined orbits for gravity and surface mapping. In this context, this work aims to perform a search for these orbits considering gravitational disturbances on a spacecraft’s orbit around different planetary moons. An analytical model for the third-body perturbati...

The aim of this project is the elaboration of theories and computer programs that will be used in aerospace missions concerning to the stability of orbits of artificial satellites around planetary satellites. The project refers to the translational motion of natural and artificial celestial bodies, taking into account perturbations by polygenic for...

The aim of this project is the elaboration of theories and computer programs that will be used in aerospace missions concerning to the stability of orbits of artificial satellites around planetary satellites. The project refers to the translational motion of natural and artificial celestial bodies, taking into account perturbations by polygenic for...

Nowadays, there are several studies for missions that will place a satellite around Europa. There are many important aspects that deserve to be studied in this natural satellite of Jupiter. It makes the study of orbits around Europa a particular important part of the mission, since a good choice for them will reduce the costs related to station-kee...

In this paper we are searching for frozen orbits around Europa to be used for aerospace tasks as regards the stability of artificial satellite orbits around this planetary satellite. The study is considering orbits of artificial satellites around Europa under the influence of the third-body perturbation (the gravitational attraction of Jupiter) and...

This study at aims performing the stability analysis of the rotational motion to artificial satellites using quaternions to describe the satellite attitude (orientation on the space). In the system of rotational motion equations, which is composed by four kinematic equations of the quaternions and by the three Euler equations in terms of the rotati...

The aim of this work is to analyze the stability of the rotational motion’s artificial satellite using the Routh Hurwitz Algorithm (CRH) and the quaternions to describe the satellite’s attitude. This algorithm allows the investigation of the stability of the motion using the coefficients of the characteristic equation associated with the equation o...

O objetivo principal deste trabalho é fazer uma análise preliminar da estabilidade do movimento rotacional de satélites artificiais utilizando o critério de Routh-Hurwitz, com as equações do movimento rotacional descritas pelas equações cinemáticas dos quatérnions e pelas equações dinâmicas da velocidade de rotação do satélite, incluindo o Torque d...