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Thu, 28 Jul 2016 08:59:00 +0100
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Thu, 28 Jul 2016 08:11:00 +0100
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Wed, 27 Jul 2016 19:00:00 +0100
Astronomers using ESO's Very Large Telescope, along with other telescopes on the ground and in space, have discovered a new type of exotic binary star. In the system AR Scorpii a rapidly spinning white dwarf star powers electrons up to almost the speed of light. These high energy particles release blasts of radiation that lash the companion red dwarf star, and cause the entire system to pulse dramatically every 1.97 minutes with radiation ranging from the ultraviolet to radio. The research will ...
Tue, 26 Jul 2016 16:00:00 +0100
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Tue, 26 Jul 2016 15:00:00 +0100
Space Systems Loral (SSL), a leading provider of innovative satellites and spacecraft systems, today announced that the Intelsat 36 satellite, designed and built for Intelsat S.A (NYSE: I), operator of the world's first Globalized Network, powered by its leading satellite backbone, has arrived at the European Spaceport in Kourou, French Guiana , where it will be launched aboard an Ariane 5 launch vehicle by Arianespace . The satellite will be used to provide media and content distribution serv...
Mon, 25 Jul 2016 14:18:00 +0100
Our RAD750 single-board computer helped the Juno spacecraft travel 2 billion miles to study our biggest planetary neighbor. With a magnetic field 20,000 times stronger than that of Earth, Jupiter presents a hostile environment for any nearby satellite electronics. Despite the challenging conditions, on July 4, 2016, NASA's Juno satellite established orbit around the massive gas giant to study its structure and evolution, thanks in part to our radiation-hardened RAD750(r) single-board computer...
Mon, 25 Jul 2016 10:35:00 +0100
The protective shipping container with Intelsat 33e is unloaded from a chartered An-124 jetliner at Félix Eboué Airport, which was followed by the satellite’s transfer by road to the Spaceport. One of two Intelsat satellites that will be orbited on Arianespace’s next Ariane 5 mission has been delivered to the Spaceport, advancing pre-launch activities for this August 24 heavy-lift flight to the payload preparation phase. Intelsat 33e “touched down” i...
Fri, 22 Jul 2016 08:29:00 +0100
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Fri, 22 Jul 2016 08:19:00 +0100
Cobham will provide motion control technology for the Advanced Technology Microwave Sounder (ATMS) instrument to be flown on the Joint Polar Satellite System 3 (JPSS-3) and 4 (JPSS-4) satellites. Hauppauge, NY - Cobham recently received an award from Northrop Grumman valued at approximately $8 million for motion control technology for the Advanced Technology Microwave Sounder (ATMS) instrument to be flown on the Joint Polar Satellite System 3 (JPSS-3) and 4 (JPSS-4) satellites. The work will ...
Thu, 21 Jul 2016 15:00:00 +0100
Space Systems Loral (SSL), a leading provider of innovative satellites and spacecraft systems, today announced it has received $20.7 million from the Defense Advanced Research Projects Agency (DARPA) to design and build robotic arm flight hardware for the first phase of the agency's Robotic Servicing of Geosynchronous Satellites (RSGS) program. SSL is receiving the funds through MDA US Systems, a division of MDA managed by SSL, and is working with the U.S. Naval Research Laboratory (NRL), which ...
Wed, 20 Jul 2016 22:24:00 +0100
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Wed, 20 Jul 2016 19:08:00 +0100
Using NASA's Hubble Space Telescope, astronomers have conducted the first search for atmospheres around temperate, Earth-sized planets beyond our solar system and found indications that increase the chances of habitability on two exoplanets. Specifically, they discovered that the exoplanets TRAPPIST-1b and TRAPPIST-1c, approximately 40 light-years away, are unlikely to have puffy, hydrogen-dominated atmospheres usually found on gaseous worlds. "The lack of a smothering hydrogen-helium enve...
Tue, 19 Jul 2016 13:58:00 +0100
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Tue, 19 Jul 2016 11:23:00 +0100
An international team of astronomers has discovered and confirmed a treasure trove of new worlds using NASA’s Kepler spacecraft on its K2 mission. Among the findings tallying 197 initial planet candidates, scientists have confirmed 104 planets outside our solar system. Among the confirmed is a planetary system comprising four promising planets that could be rocky. The planets, all between 20 and 50 percent larger than Earth by diameter, are orbiting the M dwarf star K2-72, found 181 l...
Mon, 18 Jul 2016 21:08:00 +0100
NASA's Jet Propulsion Laboratory (JPL) has awarded a contract to Northrop Grumman Corporation (NYSE:NOC) for one of several Next Mars Orbiter (NeMO) conceptual study efforts to develop concepts for a potential future orbiter. In the four-month study, the Northrop Grumman team is thoroughly evaluating a range of potential solutions using a variety of the company's production and heritage spacecraft platforms and designs. The study's focus is NeMO mission objectives and requirements, including ...
Mon, 18 Jul 2016 08:48:00 +0100
NASA’s Juno is now poised to shine a spotlight on the origins and interior structure of the largest planet in our solar system. As we wait for Juno's first close-up images of Jupiter (to be taken Aug. 27 during the spacecraft's next pass by the planet), NASA continues to explore our solar system to help answer fundamental questions about how we came to be, where we are going and whether we are alone in the universe. “Juno is the latest example of the extraordinary scienc...
Fri, 15 Jul 2016 19:04:00 +0100
After an extensive review process and passing a major development milestone, NASA is ready to proceed with final design and construction of its next Mars rover, currently targeted to launch in the summer of 2020 and arrive on the Red Planet in February 2021 . The Mars 2020 rover will investigate a region of Mars where the ancient environment may have been favorable for microbial life, probing the Martian rocks for evidence of past life. Throughout its investigation, it will collect samples of...
Fri, 15 Jul 2016 16:30:00 +0100
Today SpaceX confirmed that the company is targeting the launch of its ninth NASA Commercial Resupply Services mission (CRS-9) aboard a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station, Fla. on Monday, Jul. 18 at 12:45 a.m. EDT. As with prior NASA Commercial Resupply Service (CRS) missions, Falcon-9 will launch with an instantaneous launch window. If needed, a backup launch opportunity is available on Jul. 20 at 12:00 a.m. EDT. In addition to the primary mis...
Thu, 14 Jul 2016 15:00:00 +0100
Jon Weiner 510-486-4014 . July 14, 2016 A team of hundreds of physicists and astronomers have announced results from the largest-ever, three-dimensional map of distant galaxies. The team constructed this map to make one of the most precise measurements yet of the dark energy currently driving the accelerated expansion of the Universe. "We have spent five years collecting measurements of 1.2 million galaxies over one quarter of the sky to map out the structure of the Universe over a volume ...
Wed, 13 Jul 2016 23:00:00 +0100
Space Systems Loral (SSL), a leading provider of innovative satellites and spacecraft systems, today announced that the JCSAT-16 satellite, which it designed and built for SKY Perfect JSAT Corporation, has arrived at the Cape Canaveral Air Force Station in Florida, where it will launch aboard a SpaceX Falcon 9 launch vehicle. The satellite, which is currently being prepared for launch, will function as an in-orbit back-up that will ensure stability for existing services and further strengthen th...
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    Personal information
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    Contact information
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    Candidate Profile
     Date Submitted:21-06-2011
     Last Modified:21-06-2011 (07:05)
    Job information
     Current job:Principal Engineer
     Employment Term:Permanent
     Job location:Anywhere
     Date available:immediately
     Industry:Civil Agencies/International Organizations, Satellite Manufacturers and Subcontractors, Satellite Operators, , , Consulting/Engineering Services, Space Tourism
     KeywordsR&D ,space & satellite systems, network optimization, system design, VSAT, aeronautical communications
    CV

    experience summary

    International Expert on Satellite & Space Communications

    15+ Years of R&D and design experience in space & satellite systems

     

    citizenship

    EU Citizen (Cypriot)

     

    education

     

     

    University of Surrey, (Centre for Satellite Engineering Research), U.K.

    Ph.D., (Elec. Engineering), June 1995

    Dissertation: “Design and Performance Optimization of Multiple Access Protocols for Multi-service VSAT Networks.”

     

    University of California, Irvine, USA

    M.S., (Elec. Engineering), January 1991

     

    University of Cambridge, U.K.

    M.A. (Honours), (Electrical and Information Sciences),June 1989

     

    academic honors

     & awards

     

    • Cambridge Commonwealth Trust Scholarship Award for study at the University of Cambridge (1986-1989)
    • Fulbright Scholarship (CASP Program)for postgraduate research in the United States (1989-91)
    • Research FellowshipAward to conduct research at the University of Surrey, from U.K. Engineering & Physical Sciences Research Council (EPSRC) (1992-95)
    • Visiting FellowshipAward to work for one year at a Government Laboratory, from Canadian National Science and Engineering Research Council (1995-1996)

     

    employment history

        

    Principal Consultant, Celestial Expert, (Sept. 2009 – Present)

    • Providing Consulting services to Telecommunications & Aerospace industry

    • Participating & assisting in Proposal Preparation for EU FP7 programs and related activities

    • Developing Educational Courses on Satellite & Space Systems

     

    Principal Communications Engineer, ITT Industries, AES (Oct. 2007 – July 2009)

    • Leading R&D efforts in the area of wireless and hybrid communication networks for DoD, NASA and FAA clients

    • Leading the technical proposal effort and working on issues related to FAA’s NextGen DataComm program.

    • Participating in capture activities and proposal preparation for federal agency programs.

     

    Adjunct Professor, (Sept. 2006-Present) / Assistant Research Scientist, (Nov. 1996- Sept. 2006)

    University of Maryland, College Park

    • Member of faculty of the Institute for Systems Research,

    Center for Satellite & Hybrid Communication Networks (CSHCN).

    Main Duties:

    • Conducted research on issues related to the performance optimization of satellite and wireless communication networks.

    • Advised and managed research students,participated in teachingof graduate students.

    • Coordinated research activities with industry and government R&D laboratories.

    • Led proposal preparation effort and was responsible for deliverables for funded research.

     

    Visiting Research Scientist, (September 1995-Ocober 1996), CRC Canada

    Communication Systems / Satellite & Space Applications & Projects Division,

    Canadian Government Communications Research Center, Industry Canada.

                     

    Research Fellow, (January 1992 - June 1995), CSER, Un. of Surrey, UK

    Center for Satellite Engineering Research (CSER), University of Surrey, U.K.

     

    professional

    affiliations & recognition

     

     

     

    • Member, Institute of Electrical & Electronic Engineers (IEEE).

          •  Elected Secretary of IEEE Satellite& Space Communications Technical Committee.

    • Member, American Institute of Aerospace & Aeronautics (AIAA).

    • Has been listed in International Who’s Who of Inform. Technology, Who’s Who in Electrical Engineering andWho’s Who in the World


    work experience

    Design and Support of Communication needs of NASA Missions: Studies of intelligent architectures and related networking/coverage/interference/traffic load and security issues in order to support current and future requirements of NASA missions.

    Dynamic Bandwidth Allocation in Broadband Networks: Development of optimal policies for supporting various services with specific QoS.

    • Security and Reliability in Wireless/Hybrid Networks:  Protocol security, authentication / key distribution, threat and vulnerability risk assessments, ensuring resource availability.

    Internet protocols (TCP/IP) over wireless and space systems: Performance analysis, performance enhancement proxies, interconnection of hybrid (wired/wireless) networks.

    Satellite Constellation Design:LEO/MEO/GEO systems, trade-off studies for switching on the ground or on-board switching, network topology options, coverage, hand-off, congestion control, routing and load balancing with inter-satellite links.

    • Delay Tolerant Networks: Routing capable of operating efficiently with frequently disconnected, pre-scheduled, or opportunistic link availability, high link error rates, and networking in environments where round-trip-times may be large.

    Mobile Tactical Communications. Satellite and wireless hybrid architectures for secure information dissemination, ad-hoc networks for tactical units on the move.

    • Networking for Sensor Webs: Energy optimization and routing in distributed wireless (or space) networks; cross-layer issues in sensor networks.

     

    program

    Evaluation

    Experience

     

    Participated in (and on the list of evaluators for) grant award assessment and research program evaluation for:

    •  Canadian Ministry of Industry:  Ka-band Satellite Communication Program

    US Government Programs: US Department of Defense Programs, NASA Communication Computing and Information Technology Program, NASA Commercialization of Space Technology.

    European Commission Programs: European Commission Information Society and Media Directorate: ICT for Sustainable Growth Program.

     

    Experience in Standards

                           

    Participated and played a leading role in standardization activities and committees such as the IETF, the ATM Forum, IEEE, AIAA, RTCA and the US Telecom Industry Association.

     

    Editorial

    Experience

     

    • Serving on the Editorial Board of the International Journal of Satellite Communications (Published by Wiley).

    • Serving on the Editorial Board of Space Communications (Published by IOS Press).

    • Regularly reviewing papers for IEEE, IEE, ACM and AIAA Journals and Conferences in the area of Communications and Networking

    • Organized and Chaired the IEEE Globecom 06 Satellite & Space Communications Symposium.

     

    TEACHINGexperience

     

    • Extensive (15 years) experience with advising and supervision of research students.

    • Participation in teaching undergraduate, graduate and professional short courses on:

    • Wireless Communications
    • Wireless Sensor Networks
    • Satellite Communications

    for the University of Maryland, College Park.

     

    computer skills

     

    Simulation Packages:

    Extensive experience with discrete event simulation (using OPNET Modeler) for performance modeling and optimization of networks and experience in managing large modeling projects.

    • Experience with satellite coverage/orbit simulation packages such as Satellite Tool Kit, MATLAB.

    Other Software/Programming Skills: Exposure to a number of programming languages and extensive expertise in a wide range of office, engineering and design software.

     

    LANGUAGE

    SKILLS

     

    FLUENT

    ENGLISH

    GREEK

    VERY GOOD

    FRENCH

     

    BEGINNER

    SPANISH

     

     


    Technical Experience

     

    Principal Investigator in Government, Industry and International projects:

     

    Supporting Space Communication Needs of NASA Enterprises (funded by NASA):

     

    1. Flexible and Secure Access to Space

    - Evaluated alternatives for more efficient and dynamic ways to communicate with NASA missions, enabling scientists to access data "anytime, anywhere" through the Internet.

    - Investigated dynamic multiple access techniques for an "on-demand" operational scenario and required modifications of the Ground Network that will enable more efficient access.

    - Looked into security, traffic analysis and QoS support issues for this architecture.

     

    2. Design of Multilayer Architectures for Lunar Exploration

    • Provided technical support to the NASA Space Communications Architecture Working Group, providing analysis, performance evaluation and critiques of proposed communication architectures in support of the Lunar exploration and plans for the Mars exploration.
    • Developed a simulation model for a Hybrid Space Network that consisted of:
      • Networks of Mobile Rovers on planetary surface
      • Sensor Nets on surface and in orbit
      • Orbital Scientific Spacecraft
      • Relay Satellites
      • Ground Gateways (Earth and Planets).
    • Performed availability, coverage, protocol support and traffic multiplexing analysis.
    • Worked with the NASA Network Security subgroup, providing support and architectures for communication and network security in a space environment.

     

    1. Development of a Space Network Simulation Platform

    Developed a networking simulation platform that could enhance NASAs GSFC Distributed Simulation Environment for mission analysis. Our goal was to address specific mission requirements directly and provide solutions that will enable the simplest, most cost-effective delivery of science data when and where needed. For this purpose we

    • Developed a discrete event modular simulation platform based on OPNET Modeler that included:
      • The NASA DSN Network and the TDRS Relay Network
      • Other potential relays using commercial satellite constellations
      • Other potential Direct-to-Ground Relays
      • The International Space Station (ISS)
      • Models of typical mission spacecraft (such as MMS and TERRA) and detailed orbital models using the Satellite Tool Kit (STK) for the above spacecraft.
    • The model includes network elements such as traffic generation, layered protocol support, MAC layer and physical channel and antenna properties.

     

    4. Communication requirements for constellation/formation flying space missions and planetary sensor nets

    -Addressed the communication requirements for constellation space missions and planetary sensor networks.

    -Developed the framework for studying the operational communication trade-offs for typical constellation missions. Developed a simple prototype dynamic routing algorithm for this type of mission.

    - Investigated energy efficiency issues in sensor networks at all levels, from hardware to application level, as well as energy efficient algorithms for maximizing throughput and optimizing other metrics such as mission lifetime.

     

    4. System Engineering for supporting the International Space Station (ISS)

    • Investigated the feasibility of using existing commercial fixed ground Ka-band terminals for ISS communications in the near future, and performed a trade-off analysis between this option versus building new ground terminals at optimally placed locations.
    • Performed a coverage/availability analysis for terminal location, link budget analysis and traffic analysis for a client in the oil exploration business that needed a particular imaging service support from the ISS.

     

    5. Broadband Support for a Satellite-based Aeronautical Communication Network

    - Studied the current National Air Space communication system and FAA modernization program plans, and worked in defining the communication requirements for a satellite-based solution to broadband aeronautical communications

    - Designed an efficient and reliable transport layer protocol for aeronautical satellite networks that maintains high utilization of the satellite link and improve fairness among competing TCP connections.

     

    6. Development of Standards for Space-friendly TCP in an IPSEC environment

    • Worked with NASA, the US Telecom Industry Association (TIA) committee TR 34.1 and US industry to investigate satellite friendly solutions for TCP support for future IPv6 network supporting IPSEC.

     

    Experience in commercial SATCOM programs:

     

    • Dynamic bandwidth allocation and protocol design for a VSAT network integrating Voice and Data services (funded by UK EPSRC):

    • Design of Dynamic TDMA/TDM Multiple Access solutions.
    • Aloha-Based dynamic bandwidth Allocation for Star topology
    • Voice/Data integration for CELP coded voice over digital network

    • Design and performance optimization of the first European Ka-Band VSAT Network (funded by European Space Agency):

    • OLYMPUS Ka-band satellite link budget and coverage analysis
    • CODE Experimental VSAT Network design and optimization issues
    • CODENET Pan-european VSAT Educational Network design/deployment and traffic analysis for multimedia and Internet traffic.

    Design and Protocol optimization of first European ATM Network implementation – CATALYST Project (funded by European Union RACE, ACTS Programs):

    - Worked with ALCATEL and partners in optimizing traffic performance for data and multimedia service integrating B-ISDN islands across Europe using Satellites.

    Canadian Advanced Satellite Communications Program (funded by Canadian Government/ Ministry of Industry):

    - Worked with Canadian industry in developing requirements and evaluating design options (coverage issues, traffic and protocol support) for a next generation Ka-band satellite system.

    Handover studies for the ODYSSEY MEO Ka-band System (funded by TRW & Teleglobe):

    - Developed a simulation model and performed a handover analysis study of the final design of the ODYSSEY MEO Ka-band System, developed by TRW.

    Gateway and Performance Enhancement Proxy Design for the AstroLink System (funded by Lockheed Martin):

    • Design of TCP/IP enhancements and gateway protocols for an IP-based Ka-band broadband satellite network.
    • Development of a satellite–friendly Performance Enhancement Proxy for Internet over satellite.

    Networking Issues for IP Enabled Spacecraft (funded by NASA Glenn Research):

    • Working with Orbital Sciences, performed a trade study and suggested hardware solutions that will enable NASA to transition to an IP-capable mission spacecraft environment.
    • Performed a coverage, traffic, mobility support and security analysis of the IP network able to support spacecraft with an IP router on board.

    Advanced Telecommunications/Information Distribution Research Program (funded by US Army Research Lab (ARL )):

    • Developed a simulation model of a multi-hierarchical hybrid network consisting of satellites/UAVs/mobile vehicles and tactical units focusing on information dissemination in tactical operations.
    • Performed studies on security, information integrity, service integration, and routing support.

    Tactical support of Mobile Units using commercial satellite bandwidth (funded by CECOM/U.S. Army Space & Terrestrial Communications Directorate):

    - Investigated the development of a prototype Ka-band terminal that could be used to support communications on-the-move and on-the-pause for mobile tactical army units utilizing commercial satellite capacity.

    - Performed security/bandwidth availability/coverage and protocol support analysis.

    Optimization of two-way broadband satellite system (funded by Hughes Networks Systems):

    • Developed solutions dealing with NOC congestion, traffic analysis and PEP optimization for the HNS DirecWay broadband satellite service.
    • Investigated solutions for speed enhancement using caching techniques.
    • Investigated security issues and their implication on end-to-end system performance.

     

    More details on past projects can be found at: http://www.isr.umd.edu/~michalis/


    PUBLICATIONS

    Thesis & Dissertation

     

    • Hadjitheodosiou, M.H., “An Adaptive Multi-access Protocol for a Land-Mobile Satellite System Using a Free-Access, Multiple Channel Collision Resolution Algorithm”, M.S. Thesis, University of California, January 1992.

     

    • Hadjitheodosiou, M.H., “Design and Performance Optimization of Multiple Access Protocols for Multiservice VSAT Networks”, Ph.D. Dissertation, University of Surrey, June 1995.

     

    Research Papers

     

    More than 100 research paper contributions in books, journals and conference proceedings. (Copies can be supplied upon request).  Publication list can be found in:

    http://www.isr.umd.edu/~michalis/MHPublications.html

     

    LIST of REFEREES

     

    Professor John S. Baras

    Lockheed Martin Chair in Systems Engineering

    Director, Center for Satellite & Hybrid Communication Networks

    Institute for Systems Research, A.V. Williams Building

    University of Maryland, College Park, MD 20742, USA

     

    Professor Anthony Ephremides

    Kim Professor in Information Technology

    Institute for Systems Research, A.V. Williams Building

    University of Maryland, College Park, MD 20742, USA

     

    Professor Barry G. Evans

    Pro-Vice-Chancellor Research & Enterprise,

    Ex-Director, Centre for Communication Systems Research

    School of Electronic Engineering, Information Technology and Mathematics

    University of Surrey, Guildford,

    Surrey, GU2 5XH, UK

     

    Mr. Mario Caron

    Research Manager, Satellite Systems

    Communications Research Centre 


    3701 Carling Avenue 
P.O. Box 11490, Stn. H 


    Ottawa, ON K2H 8S2, CANADA

     

    Dr. Kul Bhasin

    Manager, Space Communications

    NASA Glenn Research Center

    21000 Brookpark Road

    MS 142-1

    Cleveland, Ohio 44135, USA


    BIOGRAPHICAL SKETCH

     

    MH received the M.A. (Honours) in Electrical & Information Sciences from the University of Cambridge, U.K. in 1989, the M.S. in Electrical & Computer Engineering from the University of California, Irvine in 1992, and the Ph.D. in Engineering (specializing in satellite communications) from the Centre for Satellite Engineering Research (CSER) at the University of Surrey, U.K., in 1995.

     

    He worked as a Research Fellow in the Communication Systems group of CSER (1991-1995) and spent a year as a visiting fellow at the Canadian Government Communications Research Center (CRC) (1995-96). In November 1996, he joined the Center for Satellite & Hybrid Communication Networks (CSHCN) at the Institute for Systems Research, University of Maryland, College Park, where he worked as an Assistant Research Scientist and is now Adjunct Professor teaching graduate classes in telecommunications. Since 2007 he has been a Principal Communications Engineer at ITT AES leading R&D activities in the area of next generation communications for FAA, NASA and DoD programs.

     

    Among his awards are: a scholarship award for studies at the University of Cambridge from the Cambridge Commonwealth Trust (1984-86); a Fulbright Scholarship for post-graduate work in the United States (1989-91); a Research Fellowship from the U.K. Engineering and Physical Sciences Research Council (EPSRC) (1992), and the Canadian National Science and Engineering Research Council (NSERC) post-doctoral fellowship award (1995).

     

    Dr. H. is an expert on satellite, space, wireless and hybrid network optimization. He has worked for several years in networking issues for VSAT networks, developed performance evaluation methods for satellite constellations, multiple access schemes for satellite networks and designs for satellite/ATM gateways. He worked on modeling and design of satellite constellations, utilization of commercial satellites for space mission support, and extending Internet services to NASA missions. His research interests include multimedia traffic modeling, service integration for wireless and hybrid networks, end-to-end performance optimization of satellite and mobile networks, protocol support over satellite channels, design optimization of next generation broadband satellite systems and aeronautical system design and optimization. He has published more than 100 papers on these topics in a variety of journals and conference proceedings, organized and chaired conferences and served on the editorial board of technical journals.  He is active in several technical committees and involved with standardization activities in the industry.


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