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Integration and Testing The MESSENGER Mission to Mercury

Integration and Testing The MESSENGER Mission to Mercury. Marcelite Jenkins Kenneth Brown South Carolina State University. ME rcury S urface, S pace EN viroment, GE ochemistry, and R anging. Why Mercury?. Mercury is an extreme terrestrial planet The smallest The densest

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Integration and Testing The MESSENGER Mission to Mercury

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  1. Integration and Testing The MESSENGER Mission to Mercury Marcelite Jenkins Kenneth Brown South Carolina State University

  2. MErcury Surface, Space ENviroment, GEochemistry, and Ranging

  3. Why Mercury? • Mercury is an extreme terrestrial planet • The smallest • The densest • The oldest surface • The largest daily variations in surface temperatures • The least explored • To develop a better understanding of how Earth formed, how it evolved, and how it interacts with the Sun

  4. Mariner flyby of Mercury • March 29, 1974 • September 21, 1974 • March 16, 1975

  5. Understanding Mercury • Why is Mercury so dense? • What is the geologic history of Mercury? • What is the structure of Mercury's core? • What is the nature of Mercury's magnetic field? • What are the unusual materials at Mercury's poles? • What volatiles are important at Mercury?

  6. Spacecraft Design • The structure is primarily composed of a graphite epoxy material • Uses a liquid chemical propulsion system • Two large solar panels, supplemented with a nickel-hydrogen battery, provide the power. • The "brains" of the spacecraft are redundant integrated electronics modules (IEMs) that house two processors • Receives commands and sends data primarily through its circularly polarized X-band phased-array antennas

  7. Spacecraft Design • Attitude determination is performed using star-tracking cameras and an Inertial Measurement Unit containing four gyroscopes and four accelerometers, with six Digital Solar Sensors as a backup • Attitude control is mostly accomplished using four reaction wheels inside the spacecraft and small thrusters • Operates at room temperature behind a sunshade made of heat-resistant ceramic cloth

  8. Instruments • Mercury Dual Imaging System (MDIS) • Gamma-Ray and Neutron Spectrometer (GRNS) • X-Ray Spectrometer (XRS) • Magnetometer (MAG) • Mercury Laser Altimeter (MLA) • Mercury Atmospheric and Surface Composition Spectrometer (MASCS) • Energetic Particle and Plasma Spectrometer (EPPS): • Radio Science (RS)

  9. Trajectory • Launch window opens May 11, 2004 • First of three Venus flybys is scheduled on November 2, 2004 from the night side, then flying past the day side of Venus on August 28, 2005, then again on October 22, 2006 • Mercury’s flybys on October 16, 2007, and July 7, 2008 • Yearlong orbit mission begins in July 2009

  10. Integration & Test Kenneth Brown South Carolina State University Willie Caraballo City College of New York Marcelite Jenkins South Carolina State University Alexander Torres City College of New York

  11. Summer Work • EPOCH Display Language (EDL) Pages • Testing Procedures • Satellite Test & Operations Language (STOL) Proc Scripts

  12. Introduction to EDL Pages • EPOCH T&C Software • EDL (EPOCH Display Language) • To display specified telemetry in an organized fashion

  13. Display Panel Coding Database EDL Page Process

  14. Database Retrieval Various Retrieval Processes • Website Telemetry Database • EPOCH User Interface (EUI) Manager Telemetry Database • Application ID (APID) Packet pages

  15. Coding

  16. Marcelite Willie CLCW FPP FPP Boot TRIOS SADA LIMITS RWA G&C Autonomy AST Propulsion Boot MP GC Preburn Alexander Kenneth MLA MAG MASCS MDIS XRS NUS Power SSR PAF Plot Completed EDL Pages

  17. Example Pages • Multiple pages provide clarity • of information • Use of pushbuttons • Diverse layout formats

  18. Testing Procedures • EPS (Energetic Particle Spectrometer) • GRS (Gamma-ray Spectrometer) • MASCS (Mercury Atmospheric and Surface Composition Spectrometer) • MGA (Magnetometer) • MLA (Mercury Laser Altimeter) • NS (Neutron Spectrometer) • XRS (X-ray Spectrometer) • Used for electrical integration of each Instruments

  19. STOL Procedures • STOL (Satellite Test & Operations Language) • Used to configure and control EPOCH T&CTM • Status • Limits

  20. Conclusions • Mercury • Design of MESSENGER and its Instruments • EDL Pages • TEST Procedures • STOL Proc Scripts

  21. Dr. Don Walter & other faculty/staff at South Carolina State University • Dean Ramona Brown & other faculty/staff at City College of New York MU-SPIN Affiliate Schools JHU APL • Dr. James Harrington • Dr. Leon P. Johnson • Dr. Shermane Austin • Beverly Lee • Barbara Northrop • James Leary • SEI Division Grants • NASA/MUSPIN CUNY Network Resource and Training site • NYC Space Science Research Alliance Acknowledgements We would like to thank the following persons and groups for their efforts in making this a successful summer internship.

  22. Acknowledgements • This work was supported by a subgrant from Tennessee State University (TSU) to South Carolina State University (SCSU) under NASA-URC NCCW-0085 awarded to TSU. • Awards to SCSU from NASA OSS grant NNG04GD62G and NASA-MU-SPIN under grants NCC 5-534 and NNG04GC40A.

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