scholarly journals Spacecraft plume interactions with the magnetosphere plasma environment in geostationary Earth orbit

2016 ◽  
Vol 121 (2) ◽  
pp. 1402-1412 ◽  
Author(s):  
K. A. Stephani ◽  
I. D. Boyd
Keyword(s):  
Earth Orbit ◽  
Geostationary Earth Orbit ◽  
Plasma Environment ◽  
Magnetosphere Plasma

scholarly journals Data association and uncertainty pruning for tracks determined on short arcs

2020 ◽  
Vol 132 (1) ◽  
Author(s):  
Laura Pirovano ◽  
Gennaro Principe ◽  
Roberto Armellin
Keyword(s):  
Optimization Problems ◽  
Data Association ◽  
Earth Orbit ◽  
Orbital State ◽  
Geostationary Earth Orbit ◽  
Multiple Observations ◽  
Observation Strategies

AbstractWhen building a space catalogue, it is necessary to acquire multiple observations of the same object for the estimated state to be considered meaningful. A first concern is then to establish whether different sets of observations belong to the same object, which is the association problem. Due to illumination constraints and adopted observation strategies, small objects may be detected on short arcs, which contain little information about the curvature of the orbit. Thus, a single detection is usually of little value in determining the orbital state due to the very large associated uncertainty. In this work, we propose a method that both recognizes associated observations and sequentially reduces the solution uncertainty when two or more sets of observations are associated. The six-dimensional (6D) association problem is addressed as a cascade of 2D and 4D optimization problems. The performance of the algorithm is assessed using objects in geostationary Earth orbit, with observations spread over short arcs.

scholarly journals Performance evaluation of multi-GNSSs navigation in super synchronous transfer orbit and geostationary earth orbit

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Tao Shi ◽  
Xuebin Zhuang ◽  
Liwei Xie
Keyword(s):  
Global Navigation Satellite System ◽  
Autonomous Navigation ◽  
Satellite System ◽  
Earth Orbit ◽  
Navigation Satellite ◽  
Geostationary Earth Orbit ◽  
Beidou Navigation Satellite System ◽  
Transfer Orbit ◽  
High Orbit ◽  
Global Navigation Satellite

AbstractThe autonomous navigation of the spacecrafts in High Elliptic Orbit (HEO), Geostationary Earth Orbit (GEO) and Geostationary Transfer Orbit (GTO) based on Global Navigation Satellite System (GNSS) are considered feasible in many studies. With the completion of BeiDou Navigation Satellite System with Global Coverage (BDS-3) in 2020, there are at least 130 satellites providing Position, Navigation, and Timing (PNT) services. In this paper, considering the latest CZ-5(Y3) launch scenario of Shijian-20 GEO spacecraft via Super-Synchronous Transfer Orbit (SSTO) in December 2019, the navigation performance based on the latest BeiDou Navigation Satellite System (BDS), Global Positioning System (GPS), Galileo Navigation Satellite System (Galileo) and GLObal NAvigation Satellite System (GLONASS) satellites in 2020 is evaluated, including the number of visible satellites, carrier to noise ratio, Doppler, and Position Dilution of Precision (PDOP). The simulation results show that the GEO/Inclined Geo-Synchronous Orbit (IGSO) navigation satellites of BDS-3 can effectively increase the number of visible satellites and improve the PDOP in the whole launch process of a typical GEO spacecraft, including SSTO and GEO, especially for the GEO spacecraft on the opposite side of Asia-Pacific region. The navigation performance of high orbit spacecrafts based on multi-GNSSs can be significantly improved by the employment of BDS-3. This provides a feasible solution for autonomous navigation of various high orbit spacecrafts, such as SSTO, MEO, GEO, and even Lunar Transfer Orbit (LTO) for the lunar exploration mission.

Development of 400 V Solar Array Technology for Low Earth Orbit Plasma Environment

2006 ◽  
Vol 34 (5) ◽  
pp. 1986-1996 ◽  
Author(s):  
S. Hosoda ◽  
T. Okumura ◽  
J.-H. Kim ◽  
K. Toyoda ◽  
M. Cho
Keyword(s):  
Low Earth Orbit ◽  
Solar Array ◽  
Earth Orbit ◽  
Plasma Environment ◽  
Array Technology

FADSat: A system engineering tool for the conceptual design of geostationary Earth orbit satellites platform

2018 ◽  
Vol 233 (6) ◽  
pp. 2152-2169
Author(s):  
Mehran Mirshams ◽  
Ehsan Zabihian
Keyword(s):  
Conceptual Design ◽  
Statistical Design ◽  
System Engineering ◽  
Design Model ◽  
Earth Orbit ◽  
Geostationary Earth Orbit ◽  
Satellite Design ◽  
Satellite Platform ◽  
Control Command ◽  
Model Approach

With regard to the increasing use of satellites platform in the geostationary orbit, a system engineering tool, FADSat, has been developed to reduce the prohibitive cost and time of their conceptual design phase. The proposed tool effectively conducts the design of the geostationary Earth orbit satellite platform lying in the mass range of 1–7000 kg. The main feature of the FADSat is to determine the conceptual design of the satellite platform with both high time performance and acceptable accuracy. Using this tool, one can readily extract the characteristics of the structure, attitude determination and control, command and data handling, electrical power, and other subsystems of a satellite. The FADSat exploits a statistical design model in the first instance to yield a rough estimation of the satellite design, i.e. a rapid extraction of the budgets for mass, power, and dimensions of the satellite subsystems as well as the cost of the satellite. Then, using a parametric design model approach, it performs subsystems design more accurately and ascertains their component specifications in terms of a catalog of products with corresponding manufacturers. A database of 462 geostationary Earth orbit communication satellites (with 30 different geostationary Earth orbit satellites platforms (launched from 2000 to 2017 has been used in this paper to implement the statistical design model approach. This tool developed in the LabVIEW software is capable of contributing to the satellite production phases as a connection to the hardware simulators of different subsystems. Herein, after describing the general concepts utilized in the satellite design, we have introduced various parts and relations of the FADSat tool. The tool’s accuracy was amply verified through flight prototypes, indicating an average error of 15% in the obtained results.

Sign in / Sign up

Export Citation Format

Share Document