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Information about 7Mar

Published on January 11, 2008

Author: Rina

Source: authorstream.com

Interplanetary Networking:  Interplanetary Networking Yeah, we mean it. Mars Exploration:  Mars Exploration Internet links, on a big scale! Radios comms on, and to Mars and the Moon:  Radios comms on, and to Mars and the Moon Use FEC: Forward error correct -- redundant information sent to make it easy to recover data when you get an error. Used both on planet and between planets. Often need to be in orbit to do good comms between planets. Sun and planet can get in the way! NASA Haughton-Mars Project 2001:  NASA Haughton-Mars Project 2001 International collaboration Project PlanetNet: Comms for Planetary Exploration, CSA/NASA/SFU/CRC. MADHR: Collaborative Networking for Exploration Mobile Exploration Technologies: NASA Ames HMP PI: Pascal Lee Chief Engineer/Flight Engineer: Steve Braham Collaborators: Peter Anderson, Rick Alena, Brian Glass, Bruce Gilbaugh Mars, on Devon Island:  Mars, on Devon Island Canadian High Arctic Twenty km Crater, 23 Mya Hostile, permafrost, barren, bears Mars-like! Astrobiology Geology Exploration technology studies Mars-like Terrain!:  Mars-like Terrain! Another Planet:  Another Planet Exploration Technology Studies:  Exploration Technology Studies Robotics Telemedicine Mission Control Field operations Human/personal comms. Internal Hab comms System security, robustness, interoperability Mars Arctic Research Station:  Mars Arctic Research Station Simulated Mars Habitat Two deck, landed spacecraft format Built by Mars Society NASA researchers on-board Full “flight” in 2001 Advanced Comms, computing Inside a spaceship:  Inside a spaceship “Biggest Mission in the World”:  “Biggest Mission in the World” Haughton-Mars Base Camp 2000:  Haughton-Mars Base Camp 2000 2000 Field Season: 150 researchers, 30 journalists Communications tent connected to Internet via satellite link, 1999 onwards Science traverses across crater region Exploration technology studies Base Camp Region:  Base Camp Region Arctic/Mars Explorers!:  Arctic/Mars Explorers! Far away from help Far from base Need to talk to other scientists Bears! Comms/Sys on Devon:  Comms/Sys on Devon Expedition/Science support Comms systems and physics experiments Computing experiments Systems integration experiments Protocol studies Mission Support (NASA JSC) High Bandwidth Field Systems:  High Bandwidth Field Systems Physics limits capabilities of conventional wireless network systems in open field, high bandwidth situations. Ground multipath dominates at high speed, and spread spectrum and frequency hopping systems fail. Canyons mean bandwidth must be delivered in the worst multipathing situations! Advanced Radio Technology:  Advanced Radio Technology Systems being tested in BC Mars Analog environments for good multipath behavior. Orthogonal Frequency Division Multiplexing: advanced, but expensive. 4th generation wireless comms. Advanced control and monitoring: close to operational needs for Mars exploration. Radio/SatCom Integrated:  Radio/SatCom Integrated Space Communications:  Space Communications Bandwidth, Bit Error Rate, other Quality of Service: faster, cheaper, and maybe even better! Steerable beams on NASA ACTS: Mars-Sat analog Marginal links, near horizon, large variation Mars Comms Physics:  Mars Comms Physics Ionospheric propagation: data collection through satcom links. Tropospheric propagation effects: through radio link behavior, combined with detailed weather data. MGS data. Multipath performance analysis of radios. Trying to bounce radio signals Spectrum measurement. Trying to see how complex the radio situation is in the field. Base Camp:  Base Camp Geology Tent Biology Tent Kitchen Tent, with Shower! Comms Tent (SFU!) Two Toilet Tents and “Pee Drum” (don’t ask) Village of Personal tents, far from the Kitchen (no Bear midnight snacking!) Building a network for Mars:  Building a network for Mars Spacecraft lands on Mars Astronauts, Robots, set up radio network Hab communicates with spacecraft in orbit Spacecraft relays messages between Earth and Mars. Maybe lasers. Multiple systems:  Multiple systems Satellite phone for emergencies Satellite power amplifier Satellite digital modem Network bridge Digital network radio Day in the life on Mars:  Day in the life on Mars Wake up in morning Receive data from Mission Control Prepare, do EVA Receive data from EVA crew, Hab and Mission Control Transmit data, medical data, to Earth Radio Repeater Network:  Radio Repeater Network Digital packet-level repeating through exploration region System needs to route packets to right place Remote network status monitoring Need for power sources Deployment in a space suit Roving!:  Roving! Global Communication:  Global Communication Interplanetary Networking Protocols:  Interplanetary Networking Protocols IPN: Interplanetary Networking Protocol, based on older concepts for pushing large files from one planet to another. Trades interactivity for reliability UDP: Normal UDP/IP, use commercial technology and build what you need. Telemetry and Robotics:  Telemetry and Robotics Return of data from remote instruments Tend to be commands files to robot, or data files back Earth-control of robotics Tele-operation of robotic rovers from Hab File transfer:  File transfer Reliability Time priority effects protocol MDPv2: broadcast based, multicast capable. Large, low time priority IPN: Relying on FEC. Smaller, higher time priority Applications more than both broadcast or file transfer PolyLAB’s Interplanetary Mailbox:  PolyLAB’s Interplanetary Mailbox Use normal mail client protocols (IMAP, POP3) to deliver and read mail on mail server. Use a special UDP-based (MDPv2) protocol to move messages between Earth and Mars. Connected Intelligence:  Connected Intelligence Extensive communication required for scientific field exploration Mission operations requires complex modalities in Human missions Purely robotic comms solutions don’t work Protocols define capabilities Applications define protocols Transport, then application Videoconferencing:  Videoconferencing Broadcast:  Broadcast Video and Audio Telemetry Can lose frames for humans Robots respond badly to partial data Humans on both sides in human missions UDP fine SCPS is the IPN equivalent. Remote Communication:  Remote Communication Collaborative Software:  Collaborative Software Advanced Services:  Advanced Services Database access: access and update of information. XML standards/translation services: similar to WML/WAP. Distributed computing: systems all over the planet Voice input and output: hands tough to use in a spacesuit! Regional, space, network management Need to be Alive, Need to be Happy!:  Need to be Alive, Need to be Happy! Get dirty, smelly Get to know all the habits of the team limited entertainment 6-9 months TO Mars 18 months ON Mars It’s about people What’s it good for?:  What’s it good for? Disaster communications Remote communities Developing countries Testing advanced systems

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