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Articles 1 - 30 of 444
Full-Text Articles in Systems and Communications
Machine Learning Based Critical Resource Allocation In Mixed-Traffic Cellular Networks, Mohamed Nomeir
Machine Learning Based Critical Resource Allocation In Mixed-Traffic Cellular Networks, Mohamed Nomeir
Theses and Dissertations
The proliferation of cellular networks over the past two decades has encouraged the expansion of their use in many modern applications. These applications involve the use of data traffic of different quality of service (QoS) requirements. Some of these requirements are quite stringent such as in the case of critical Internet of Things (IoT) health care, military and homeland security applications. This situation resulted in imposing a variety of resource allocation requirements on the cellular network operation in a simultaneous manner.
In this thesis, we consider the challenging problem of mixed-traffic resource allocation, or scheduling, in cellular networks. We focus …
Situation-Aware Quality Of Service Enhancement For Heterogeneous Ultra-Dense Wireless Iot Networks, Sabin Bhandari
Situation-Aware Quality Of Service Enhancement For Heterogeneous Ultra-Dense Wireless Iot Networks, Sabin Bhandari
Electronic Thesis and Dissertation Repository
By engaging a massive number of heterogeneous devices, future Internet of Things (IoT) systems are expected to support diverse applications ranging from eHealthcare to industrial control. In highly-dense deployment scenarios such as Industrial IoT (IIoT) systems, meeting the stringent Quality of Service (QoS) requirements such as low-latency and high reliability becomes challenging due to the uncertainty and dynamics within the IoT networks. To enhance the overall QoS performance, this thesis aims to address the technical challenges of IoT networks. Firstly, to enhance the network reliability, a cloud-assisted priority-based channel access and data aggregation scheme is proposed to minimize the network …
Analysis Of Deep Learning Methods For Wired Ethernet Physical Layer Security Of Operational Technology, Lucas Torlay
Analysis Of Deep Learning Methods For Wired Ethernet Physical Layer Security Of Operational Technology, Lucas Torlay
All Theses
The cybersecurity of power systems is jeopardized by the threat of spoofing and man-in-the-middle style attacks due to a lack of physical layer device authentication techniques for operational technology (OT) communication networks. OT networks cannot support the active probing cybersecurity methods that are popular in information technology (IT) networks. Furthermore, both active and passive scanning techniques are susceptible to medium access control (MAC) address spoofing when operating at Layer 2 of the Open Systems Interconnection (OSI) model. This thesis aims to analyze the role of deep learning in passively authenticating Ethernet devices by their communication signals. This method operates at …
Machine Learning For Unmanned Aerial System (Uas) Networking, Jian Wang
Machine Learning For Unmanned Aerial System (Uas) Networking, Jian Wang
Doctoral Dissertations and Master's Theses
Fueled by the advancement of 5G new radio (5G NR), rapid development has occurred in many fields. Compared with the conventional approaches, beamforming and network slicing enable 5G NR to have ten times decrease in latency, connection density, and experienced throughput than 4G long term evolution (4G LTE). These advantages pave the way for the evolution of Cyber-physical Systems (CPS) on a large scale. The reduction of consumption, the advancement of control engineering, and the simplification of Unmanned Aircraft System (UAS) enable the UAS networking deployment on a large scale to become feasible. The UAS networking can finish multiple complex …
Automated Flight Controller Adaptive Compensation For Actuator Failures In Transport Type Aircraft, Daniel James Fresella
Automated Flight Controller Adaptive Compensation For Actuator Failures In Transport Type Aircraft, Daniel James Fresella
Graduate Theses and Dissertations
Aircraft operate over a wide range of conditions including atmospheric, weight, and center ofgravity changes. This presents a substantial challenge to automatic control system designers. When these operating conditions are merged with a partial or full control surface failure, automatic flight control is near impossible with conventional controllers. Additionally, when pilots experience control failure emergencies during flight, workload and fatigue increase drastically. The continued research of automatic flight control systems that can seamlessly adapt to unmodelled failures will enable a new generation of robust aircraft control. In this paper a 9th order 6 degree of freedom aircraft model is used …
Indoor Positioning Using Synchronized Ultrasonic Ofdma Signals, Julian Bartolone
Indoor Positioning Using Synchronized Ultrasonic Ofdma Signals, Julian Bartolone
Master's Theses
This paper proposes a method of short-range indoor localization using differential phase measurements of synchronized two-tone ultrasonic signals in an Orthogonal Frequency Multiple Access (OFDMA) scheme. This indoor positioning system (IPS) operates at an ultrasonic frequency of approximately 40kHz and synchronizes using an infrared signal. The OFDMA scheme allows for a receiver to process the signals from multiple transmitters continuously without the signals interfering with each other. The phases of the signals are measured using Goertzel Filters, allowing for low-complexity frequency content analysis. A MATLAB simulation using the proposed localization method is performed using four transmitter nodes in the corners …
Network Management, Optimization And Security With Machine Learning Applications In Wireless Networks, Mariam Nabil
Network Management, Optimization And Security With Machine Learning Applications In Wireless Networks, Mariam Nabil
Theses and Dissertations
Wireless communication networks are emerging fast with a lot of challenges and ambitions. Requirements that are expected to be delivered by modern wireless networks are complex, multi-dimensional, and sometimes contradicting. In this thesis, we investigate several types of emerging wireless networks and tackle some challenges of these various networks. We focus on three main challenges. Those are Resource Optimization, Network Management, and Cyber Security. We present multiple views of these three aspects and propose solutions to probable scenarios. The first challenge (Resource Optimization) is studied in Wireless Powered Communication Networks (WPCNs). WPCNs are considered a very promising approach towards sustainable, …
Evaluating Deep-Learning Models For Debris-Covered Glacier Mapping, Zhiyuan Xie, Vijayan K. Asari, Umesh K. Haritashya
Evaluating Deep-Learning Models For Debris-Covered Glacier Mapping, Zhiyuan Xie, Vijayan K. Asari, Umesh K. Haritashya
Electrical and Computer Engineering Faculty Publications
In recent decades, mountain glaciers have experienced the impact of climate change in the form of accelerated glacier retreat and other glacier-related hazards such as mass wasting and glacier lake outburst floods. Since there are wide-ranging societal consequences of glacier retreat and hazards, monitoring these glaciers as accurately and repeatedly as possible is important. However, the accurate glacier boundary, especially the debriscovered glacier (DCG) boundary, which is one of the primary inputs in many glacier analyses, remains a challenge even after many years of research using conventional remote sensing methods or machine-learning methods. The GlacierNet, a deep-learning-based approach, utilized the …
Plasmonic Field-Effect Transistors (Terafets) For 6g Communications, Michael Shur, Gregory Aizin, Taiichi Otsuji, Victor Ryzhii
Plasmonic Field-Effect Transistors (Terafets) For 6g Communications, Michael Shur, Gregory Aizin, Taiichi Otsuji, Victor Ryzhii
Publications and Research
Ever increasing demands of data traffic makes the transition to 6G communications in the 300 GHz band inevitable. Short-channel field-effect transistors (FETs) have demonstrated excellent potential for detection and generation of terahertz (THz) and sub-THz radiation. Such transistors (often referred to as TeraFETs) include short-channel silicon complementary metal oxide (CMOS). The ballistic and quasi-ballistic electron transport in the TeraFET channels determine the TeraFET response at the sub-THz and THz frequencies. TeraFET arrays could form plasmonic crystals with nanoscale unit cells smaller or comparable to the electron mean free path but with the overall dimensions comparable with the radiation wavelength. Such …
The Factors Influencing The Acceptance Of Web-Based E-Learning System Among Academic Staffs Of Saudi Arabia, Ikhlas Zamzami
The Factors Influencing The Acceptance Of Web-Based E-Learning System Among Academic Staffs Of Saudi Arabia, Ikhlas Zamzami
Future Computing and Informatics Journal
It is possible to learn more quickly and effectively with e-learning software development because it provides learners with convenient and flexible learning environments. This allows them to progress further in their careers. Reports on web-based e-learning systems for in-service education have frequently neglected to include the viewpoint of the instructor. In order to conduct quantitative research, a sample of 50 academic staff members was selected. The purpose of this study was to investigate various factors that influence the intention to use web-based e-learning, with the theoretical foundation being provided by university lecturers. According to the findings of the study, the …
Enhancing Academic Advising In Credit Hours System Using Dss, Alaa Salah Eldin Ghoneim
Enhancing Academic Advising In Credit Hours System Using Dss, Alaa Salah Eldin Ghoneim
Future Computing and Informatics Journal
Academic advising plays a vital role in achieving higher educational institution’s purposes. Academic advising is a process where an academic advisor decides to select a certain number of courses for a student to register in each semester to fulfil the graduation requirements. This paper presents an Academic Advising Decision Support System (AADSS) to enhance advisors make better decisions regarding their students’ cases. AADSS framework divided into four layers, data preparation layer, data layer, processing layer and decision layer. The testing results from those participating academic advisors and students considered are that AADSS beneficial in enhancing their decision for selecting courses.
Intelligent Internet Of Things Frameworks For Smart City Safety, Dimitrios Sikeridis
Intelligent Internet Of Things Frameworks For Smart City Safety, Dimitrios Sikeridis
Electrical and Computer Engineering ETDs
The emerging Smart City ecosystem consists of a vast edge network of Internet of Things (IoT) devices that continuously interact with mobile devices carried by its citizens. In this setting, the IoT infrastructure, apart from the main communications facilitator, acts as a crowdsourcing mechanism that collects massive amounts of user data, and can support public safety applications for the Smart City. In this thesis, we design and analyze learning mechanisms that extract intelligence from crowd interactions with the wireless IoT infrastructure, and optimize its energy efficiency while operating as a public safety network. First, we deploy a multi-story facility testbed …
Improvement On Pdp Evaluation Performance Based On Neural Networks And Sgdk-Means Algorithm, Fan Deng, Houbing Song, Zhenhua Yu, Liyong Zhang, Xi Song, Min Zhang, Zhenyu Zhang, Yu Mei
Improvement On Pdp Evaluation Performance Based On Neural Networks And Sgdk-Means Algorithm, Fan Deng, Houbing Song, Zhenhua Yu, Liyong Zhang, Xi Song, Min Zhang, Zhenyu Zhang, Yu Mei
Publications
With the purpose of improving the PDP (policy decision point) evaluation performance, a novel and efficient evaluation engine, namely XDNNEngine, based on neural networks and an SGDK-means (stochastic gradient descent K-means) algorithm is proposed. We divide a policy set into different clusters, distinguish different rules based on their own features and label them for the training of neural networks by using the K-means algorithm and an asynchronous SGDK-means algorithm. Then, we utilize neural networks to search for the applicable rule. A quantitative neural network is introduced to reduce a server’s computational cost. By simulating the arrival of requests, XDNNEngine is …
Issue 18: Contributors, Don Flournoy
Issue 18: Contributors, Don Flournoy
Online Journal of Space Communication
List of Issue 18 Contributors
Sunsat Design Competition 2015-2016 First Place Winner – Team Space Transport: Power Satellites Beamed Energy Bootstrapping, Keith Henson, Anna Nesterova
Sunsat Design Competition 2015-2016 First Place Winner – Team Space Transport: Power Satellites Beamed Energy Bootstrapping, Keith Henson, Anna Nesterova
Online Journal of Space Communication
This International SunSat Design Competition first-place winner for 2016 describes a beamed energy transport system that will operate in Space above low earth orbit (LEO) as a way to move power satellite parts into high orbits.
This design, entitled “Beamed Energy Bootstrapping,” makes use of small propulsion power satellites to provide the energy for space-based vehicles using electric arcjets. The proposal lays out a scheme to get the first propulsion power satellite in place without damage as it passes through the orbiting space junk below 2000 km.
Click here to see the video: Space Transport for Power Satellites Beamed Energy …
Sunsat Design Competition 2015-2016 Second Place Winner – Team Pathway To Power : Wireless Power Transfer, Javier Tandazo, Ethan Wong, Curtis Waggoner, John Guggenheim, Alexander Carter
Sunsat Design Competition 2015-2016 Second Place Winner – Team Pathway To Power : Wireless Power Transfer, Javier Tandazo, Ethan Wong, Curtis Waggoner, John Guggenheim, Alexander Carter
Online Journal of Space Communication
Solar Power Satellites (SPS) using Wireless Power Transfer (WPT) to beam renewable energy to consumers on earth face three grand challenges: moving parts, heat dissipation, and radio interference. Solutions to each of these “show stoppers” are presented here. Further, a progressively more-complex pathway is described which starts where we are now and leads step-wise to implementation of large-scale Space Solar Power (SSP).
The first two grand challenges are addressed by a novel SPS design based on a thin-walled cylinder configuration of solar panels. The remaining challenge is tackled through a newly-discovered antenna configuration which allows dramatic reduction in radio/telecom interference …
Sunsat Design Competition 2014-2015 Third Place Winner – Team Martian: Space Solar Power Test Bed, Jeremy Straub, Tristan Plante, Benjamin Kading, Alex Holland, Landon Klein, Jordan Forbord
Sunsat Design Competition 2014-2015 Third Place Winner – Team Martian: Space Solar Power Test Bed, Jeremy Straub, Tristan Plante, Benjamin Kading, Alex Holland, Landon Klein, Jordan Forbord
Online Journal of Space Communication
We propose a four-stage plan to demonstrate the effectiveness and safety of Space Solar Power (SSP) for use on Earth. Our project goal is to achieve Technology Readiness Level (TRL) by means of: 1) a test mission in low Earth orbit using a small spacecraft; 2) that will support a manned mission to Mars; 3) that includes a bent pipe experiment (power supplied from Earth, to a spacecraft and back to Earth), and 4) to complete system deployment.
The primary impediment to SSP implementation is thought to be the acceptance of the system by those on Earth who may be …
Sunsat Design Competition 2014-2015 First Place Winner – Team Cast: Multi-Rotary Joints Sps, Xinbin Hou, Meng Li, Lili Niu, Lu Zhou, Ying Chen, Zhengai Cheng, Haipeng Ji
Sunsat Design Competition 2014-2015 First Place Winner – Team Cast: Multi-Rotary Joints Sps, Xinbin Hou, Meng Li, Lili Niu, Lu Zhou, Ying Chen, Zhengai Cheng, Haipeng Ji
Online Journal of Space Communication
Space Power Satellite (SPS) is a huge spacecraft designed to collect solar energy in space for supplying electric power to the electric grid on the ground. The SPS concept was first proposed by Dr. Peter Glaser in 1968.
Various studies on SPS in various countries have been produced over the past forty years. Today, there are multiple variations on this early concept, both in innovation and in optimization. Because of the huge size, immense mass and high power of these SPS installations, there are many technological difficulties.
Here, a new Multi-Rotary Joints SPS (MR-SPS) concept is proposed. The large solar …
Sunsat Design Competition 2014-2015 Second Place Winner – Team Sunflower: Thermal Power Satellite, Keith Henson, Steve Nixon, Kris Holland, Anna Nesterova
Sunsat Design Competition 2014-2015 Second Place Winner – Team Sunflower: Thermal Power Satellite, Keith Henson, Steve Nixon, Kris Holland, Anna Nesterova
Online Journal of Space Communication
Space-based Solar Power has failed to be competitive on cost in spite of decades of study. A new approach appears to resolve the cost issue, undercutting coal and opening huge markets for low cost solar power from space. There are two parts to the problem. First is the cost of lifting parts to Geosynchronous Earth Orbit (GEO; second is the mass of parts that make up a power satellite.
Our team is proposing a combination that makes use of Skylon to Low Earth Orbit (LEO), and a 15,000 ton payload ground powered electric propulsion from LEO to GEO. This strategy …
Sunsat Design Competition 2013-2014 Third Place Winner – Team University Of North Dakota: Nano Ssp Satellite, Corey Bergsrud, Robert Bernaciak, Ben Kading, John Mcclure, Jeremy Straub, Subin Shahukhal, Karl Williams
Sunsat Design Competition 2013-2014 Third Place Winner – Team University Of North Dakota: Nano Ssp Satellite, Corey Bergsrud, Robert Bernaciak, Ben Kading, John Mcclure, Jeremy Straub, Subin Shahukhal, Karl Williams
Online Journal of Space Communication
This work presents the conceptualization of a Space-to-Space Microwave Wireless Power Transmission (S2S-MWPT) experimental demonstration mission using small spacecraft. Literature reviews [1, 2] suggest a stepwise procedure for technology demonstrations in support of advancing space solar power satellite (SSPS) systems. These technologies should be verified first on Earth and then in-space using small satellites. This project built its S2S-MWPT demonstration concept within the University NanoSat program restrictions (dimensions of 50cm x 50cm x 60cm and mass of 50kg). The idea is to use these upper limit restrictions to develop the MWPT spacecraft (MicroSat). Contained inside the MicroSat …
Sunsat Design Competition 2013-2014 Second Place Winner – Team Solar Maximum Llc: Sun-Synchronous Orbits, Danny R. Jones, Anna Nesterova
Sunsat Design Competition 2013-2014 Second Place Winner – Team Solar Maximum Llc: Sun-Synchronous Orbits, Danny R. Jones, Anna Nesterova
Online Journal of Space Communication
The orbital location of PowerSats plays a critical role in determining the mass of the solar power satellite (PowerSat) transmitter and the size of the rectenna on the Earth’s surface. These in turn play an important role in the cost of deploying the PowerSat, especially the cost of launching the PowerSat into orbit as the transmitter makes up a large part of the PowerSats mass. We will consider a new approach to PowerSat orbital positioning by considering a circular sun-synchronous orbit at 5,185.3 kilometers with an inclination of 142.1 degrees. Locating the PowerSat at this location offers several benefits and …
Sunsat Design Competition 2013-2014 First Place Winner – Team Rajiv Gandhi University: Helioastra, Akhil Raj Kumar Kalapala, Krishna Bhavana Sivaraju
Sunsat Design Competition 2013-2014 First Place Winner – Team Rajiv Gandhi University: Helioastra, Akhil Raj Kumar Kalapala, Krishna Bhavana Sivaraju
Online Journal of Space Communication
HelioAstra is a creative design and visualization of an advanced Space Solar Power system. Its concept is validated by a credible science and engineering approach and an innovative business plan.
The space and ground receiving segments are made up of high efficiency Fresnel lens concentrator quantum dot solar cells. The solar array in space is sized at 933 m2. It delivers 1 MW (1000 kW) of perennial, clean and eco-friendly solar electric power at the bus-bars on the ground.
A solid state laser system containing Neodymium doped Yttrium Aluminium garnet (Nd: Y3Al5O12) will accurately and efficiently transmit power. A ground …
The Application Of Electronic Certificates For Ships In China: An Ecosystem-Based Approach, Huanhuan Song
The Application Of Electronic Certificates For Ships In China: An Ecosystem-Based Approach, Huanhuan Song
World Maritime University Dissertations
No abstract provided.
Issue 17: Contributors, Don Flournoy
Issue 17: Contributors, Don Flournoy
Online Journal of Space Communication
List of Issue 17 Contributors
A Us-India Power Exchange Towards A Space Power Grid, Brendan Dessanti, Nicholas Picon, Carlos Rios, Shaan Shah, Narayanan Komerath
A Us-India Power Exchange Towards A Space Power Grid, Brendan Dessanti, Nicholas Picon, Carlos Rios, Shaan Shah, Narayanan Komerath
Online Journal of Space Communication
The Space Power Grid (SPG) architecture
described in papers from our group since 2006, is an
evolutionary approach to realizing the global dream of
Space Solar Power (SSP). SPG first concentrates on helping
terrestrial power plants become viable, aligning with public
policy priorities. It enables a real -time power exchange
through Space to help locate new plants at ideal but remote
sites, smooth supply fluctuations, reach high-valued
markets, and achieve baseload status. With retail cost kept
to moderate levels, a constellation grows in 17 years to 100
power relay satellites at 2000 km sun-synchronous and
equatorial orbits and 250 terrestrial …
From Uranium Enrichment To Renewable Energy: Conversion Of The Us-Doe’S Former Portsmouth Gaseous Diffusion Plant (Ports) In Piketon, Ohio, Into A Clean Energy Production Facility Within A Decade, Don Flournoy, Shmuel Roth, Mohammad Ala-Uddin
From Uranium Enrichment To Renewable Energy: Conversion Of The Us-Doe’S Former Portsmouth Gaseous Diffusion Plant (Ports) In Piketon, Ohio, Into A Clean Energy Production Facility Within A Decade, Don Flournoy, Shmuel Roth, Mohammad Ala-Uddin
Online Journal of Space Communication
The large-scale energy production projects described here, of which the
Portsmouth Solar Power Production site at Piketon Ohio is the illustrative
example, are chosen to describe how multi-megawatt quantities of “baseload”
renewable electrical power can be reliably generated from terrestrial solar farms.
Also to be shown are the steps to be taken in making these energy resources
simultaneously available to local and global power grids, 24-hours-a-day 12-
months-a-year.
This paper focuses attention on The U.S. Department Of Energy’s former
Portsmouth Gaseous Diffusion Plant (PORTS), a Cold War-era uranium
enrichment plant located on a secure 3,700+ acres in a rural area …
Space Solar Power Aids Space Settlement, Gaurav Kumar, Deepak Talwar, Harmanjot Singh Walia, Mahiyal B. Singh, Kaenat Seth, Ishaan Mehta, Navdeep Singh Makkar
Space Solar Power Aids Space Settlement, Gaurav Kumar, Deepak Talwar, Harmanjot Singh Walia, Mahiyal B. Singh, Kaenat Seth, Ishaan Mehta, Navdeep Singh Makkar
Online Journal of Space Communication
The Grand Prize for the 2011 NASA Ames Space Settlement Contest went to a team of 7 students (11-12 grades) from Punjab, India for creating the Hyperion Space Settlement. This year the contest received 355 submissions from 1078 students sponsored by 114 teachers. Entries came from 14 countries: Australia, Bulgaria, Canada, China, India, Ireland, Japan, Pakistan, Romania, Singapore, Turkey, Ukraine, United Arab Emirates, and the United States. The prize was conferred on the students during the International Space Development Conference 2011 (ISDC 2011) held in Huntsville, Alabama, USA.
Advisors: The teachers of Spring Dale Senior School in Amritsar, India. Stephen …
Space Solar Rectifying Antenna On Earth, Corey Bergsrud, Timothy Dito, Matthew Anderson, Matthew Clausing, Chase Freidig
Space Solar Rectifying Antenna On Earth, Corey Bergsrud, Timothy Dito, Matthew Anderson, Matthew Clausing, Chase Freidig
Online Journal of Space Communication
The realization of solar power from space is becoming increasingly closer as a solution to solving the continued growth in energy demand. Space based solar power is also being perceived as an alternative solution for non-renewable energy resources. Future solar power satellites will be positioned in orbit around the Earth where they will collect solar radiation. That radiation will be transformed into a microwave energy beam that is targeted to a receiving rectifying antenna or “rectenna” located on Earth’s surface. The received microwave energy will be converted into direct current electricity.
This presentation focuses on the microwave patch antennas used …
From Uranium Enrichment To Renewable Energy, Harold Bon, Solomon Brown, Michael Cisneros, Kent Engel, Tyler Goldberg, Matt Kissel, Alexa Krivoniak, Brandon Lutz, Zach Reese, Amanda Roberts, Colin Stonerook, Zoe Zeszut, Anthony Zoccola
From Uranium Enrichment To Renewable Energy, Harold Bon, Solomon Brown, Michael Cisneros, Kent Engel, Tyler Goldberg, Matt Kissel, Alexa Krivoniak, Brandon Lutz, Zach Reese, Amanda Roberts, Colin Stonerook, Zoe Zeszut, Anthony Zoccola
Online Journal of Space Communication
The goal of this Science/Engineering visualization is to show how gigawatt quantities of renewable energy can be generated at former nuclear processing sites as they are repurposed into industrial scale electrical power generation stations. The breakthrough product of this research is the design of an integrated terrestrial solar/space energy receiving station that will produce “baseload” electricity 24 hours a day.
This research focuses attention on a Cold War-era uranium enrichment facility located on 3,700 acres of land in a rural area of SE Ohio. This site is judged to be suitable for research leading to the first-ever combination ground-based and …
Space Solar Power With Sunsynchronous Orbits, Michael Blohm, Alan Guy, Kyle Perkins, Adam Roades, Samantha Williams
Space Solar Power With Sunsynchronous Orbits, Michael Blohm, Alan Guy, Kyle Perkins, Adam Roades, Samantha Williams
Online Journal of Space Communication
The basic problem being addressed here is the high initial cost of solar power satellite (SPS) systems. The cost is higher for GEO orbits because of the large solar array and transmitter sizes required from that distance, and the expense of lifting such a mass into the higher orbits. Aperture size is proportional to the distance the power is beamed; thus transmitter apertures can be smaller when nearer to Earth.
Decreasing the distance energy must be beamed through space means that the powersat need not be so large, or as expensive. Implementation of sunsynchronous sunsats will likely be a more …