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Internship Experience at NASA-GSFC and JHUAPL

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Title: Internship Experience at NASA-GSFC and JHUAPL


1
Internship Experience at NASA-GSFC and JHUAPL
  • Bill Van Besien
  • D.C. Space Grant Consortium Sponsorship Recipient
  • National Science Foundation Cyber Corps Scholar
  • Johns Hopkins University Applied Physics Lab
  • George Washington University (BS 09, MS 10)
  • September 8th, 2008

2
Introduction
  • Educational
  • Computer Science, B.S. from GWU 2009
  • Computer Science (Focus in Computer Security and
    Information Assurance), M.S. from GWU 2010
  • National Science Foundation Cyber Corps Scholar
  • Contributed Projects under D.C. Space Grant
  • NASA Goddard Space Flight Center (2007)
  • Expandable Reconfigurable Instrument Nodes (ERIN)
  • Johns Hopkins University Applied Physics Lab
    (2008)
  • Analysis of CCSDS File Delivery Protocol on
    MESSENGER
  • Continued work in public Space sector
  • Senior Design Secure and Authenticated Deep
    Space Communication
  • Delay Tolerant Networking Protocol Suite
  • Future plans in the Space Industry

3
NASA Goddard Space Flight Center Internship
  • Student Internship Program (SIP), Summer 2007
  • Code 564 Microelectronics and Signals
    Processing Branch
  • Mentor Kenda Newton
  • Expandable Reconfigurable Instrument Node (ERIN)
  • Distributed Sensor Network with terrestrial and
    space applications
  • Generic sensor platform with on-boarddata
    processing capabilities
  • Contributions
  • Developed serial-to-parallel hardwareinterface
    in VHDL
  • Developed custom connector bypassingmanufacturer
    s I/O board saving mass,money and power
    consumption
  • Produced documentation for integratingGPS
    receiver into hardware
  • Debugged flight software for a UAV at Wallops
    Island facility (radiometerdemonstration)

4
JHU Applied Physics Lab Internship
  • APL Student Internship Program, Summer 2008
  • Space Department, Embedded Applications Group
  • Mentor Chris Krupiarz
  • Activities at the Lab
  • MESSENGER
  • Developed application to determine state of CFDP
    from spacecraft telemetry log
  • Results will be used in upcoming publication
    analyzing performance of CFDP on MESSENGER
  • Radiation Belt Storm Probes (RBSP)
  • Gained experience developing flight software with
    CFE and CFDP from Goddard
  • Student Trojan Asteroid Mission Proposal (STAMP)
  • Interns designed mission to Trojan asteroids near
    Jupiter
  • Each intern given specialty (e.g., avionics, FSW,
    propulsion, R/F, systems engineering, etc)

5
CFDP Performance on MESSENGER
  • What is CFDP?
  • Standardization of communication protocols and
    ground systems
  • Requirement to downlink science and telemetry
    data as fast as possible
  • Observed that bitrate can be increased as antenna
    angle from horizon increases
  • Must determine
  • Frequency and distribution of bit errors
  • Optimal configuration of CFDP to maximize
    effective downlink speed
  • CFDP Header Parser makes this investigation much
    simpler

Raw Ground Software Telemetry Dump
PDU Header Parser Architecture
6
Senior Design CFDP Security Layer
  • Provides data authentication and confidentiality
    (encryption) to systems working within a CFDP
    framework
  • Threats to Deep Space Missions, current and
    future
  • Extremely limited telecommand authentication
  • Individuals or organizations may sabotage (or
    otherwise affect) space craft
  • Earth departure/flybys do not require large
    (DSN-caliber) dish or narrow beam-width
  • Independent or foreign government teams may be
    able to uplink to spacecraft
  • Standard ground software for International
    Missions
  • Chinese, Russian, US, and more operating through
    same ground system
  • All communication unencrypted and subject to
    eavesdropping
  • Legal repercussions for proprietary or
    export-controlled instruments
  • Dual use technologies
  • Enforce separation between protocol layers
  • Security layer will encrypt all data to and from
    thespacecraft
  • Authentication layer will ensure that
    telecommandsto the spacecraft are from the MOC
  • Selectable levels of security

7
Delay Tolerant Networking (DTN)
  • Suite of protocols amounting to an
    Interplanetary Internet
  • Interplanetary communication involves
  • Extremely high latency
  • High bit-error rates
  • Asymmetric communication
  • Intermittent communication windows
  • Common protocols in use in the Internet (TCP/IP)
    do not perform on networks with these constraints
  • CFDP has some functionality, but
  • Does not have clear separate levels of
    abstraction like TCP/IP
  • Largely limited to point-to-point (i.e., not
    intended to rout through a complex network)
  • Intended to be phased out within several years
  • Case study of Mars system
  • Agents and routers are rovers on the surface,
    stationary Landers, and orbital relay stations
  • DTN is a joint effort between JHUAPL and NASA JPL

8
Experience with Internship Program
  • Intern Mentoring
  • Highly Supportive mentors who I have kept in
    contact with after internship
  • Real contributions to projects
  • Developed hardware, software, and utilities for
    spaceflight missions
  • Opportunity to explore other areas
  • CS major, but worked in EE
  • Challenging Projects
  • Able to directly apply concepts learned from
    coursework
  • Professional networking
  • Friends in theoretical physics, mission design,
    management, and EE
  • Special thanks to the D.C. Space Grant Consortium
    for sponsoring my internships at GSFC and APL!
  • Thank you!!
  • Any questions?
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