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http://institute.nsta.org/web_seminars.asp

LIVE INTERACTIVE LEARNING @ YOUR DESKTOP. NASA/NSTA Web Seminar: Lunar Exploration: Mapping the Moon. http://institute.nsta.org/web_seminars.asp. Mapping the Moon. Anuradha Koratkar, Susan Hoban Albert Hill, Brendan Shaughnessy. Why do we need maps?. To locate something

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  1. LIVE INTERACTIVE LEARNING @ YOUR DESKTOP NASA/NSTA Web Seminar: Lunar Exploration: Mapping the Moon http://institute.nsta.org/web_seminars.asp

  2. Mapping the Moon Anuradha Koratkar, Susan Hoban Albert Hill, Brendan Shaughnessy

  3. Why do we need maps? • To locate something • To navigate to a certain location • To explore a region • To build something in an area • To determine the boundaries of an area We need maps for multiple reasons

  4. Why map the Moon? • Longest Apollo mission was 12 days. Now this time around we plan to go for months to the Moon. • We need to land safely, find a site for a habitat, and explore the surface. • Need to know the lay of the land, or scientifically we need to know the lunar topology. Accurate maps are essential for exploration activities.

  5. How do we see an object? Talk on the telephone. Unmute by using *6

  6. To “see” an object, radiation has to be reflected or transmitted from that object. • To “see” an object, it must be about the same size or larger than thewavelength of the radiation that is used to see it. Light source Detector/Eye

  7. How do we map something? • Draw a picture • Take a photograph

  8. Can you estimate the size and height of some of the features by just looking at this picture?

  9. How do we generate topographic maps? • Laser Imaging Detection And Ranging (LIDAR) is a technique used to determine the distance to an object or surface. • LIDAR typically uses UV, visible or IR pulses.

  10. Basic operation of a LIDAR altimeter Laser pulse transmitter (T0) Receiver telescope (Tr) Satellite orbit Range = c*(Tr-T0)/2 Scattered light Scattered light Reference level

  11. 3 clicks 6 clicks

  12. MOLA Topographic map of Mars

  13. Poll question The average elevation of the southern highlands is? • 1-2 m • 1-2 km • 5-8 km • 5-8 m

  14. Poll question (T/F) The nearside of the moon has less variation than the far-side of the moon. • True • False

  15. We defined a matrix which helps us decide which site best fits our needs. • We need to do a similar analysis to find a site to land on the Moon.

  16. Factors that affect choice of site on the Moon Talk on the telephone. Unmute by using *6

  17. Factors that affect choice of site • Orbital mechanics • Landing safety • Mobility • Power • Communication • In situ resources

  18. Independent of the choice of site we will need accurate maps essential for landing safely and for exploration

  19. Lunar Orbiter Laser Altimeter (LOLA) on the Lunar Reconnaissance Orbiter (LRO) mission will determine global topography. • Accuracy of <3m in elevation and <30m in the horizontal. • The landing sites will be at a better accuracy (<1m vertical)

  20. If you have any questions let us discuss them on the discussion listserv. Flavio will send everyone a link to subscribe to it. For those of you working on earning two credits, there is homework. Flavio will send you a message with a link to it. Please send it in by 14th Nov. 2006 See you at the next session on the 14th of Nov. which will be: Water, Water Everywhere?

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