1. DemoSat V: The Mousetrap August 03, 2007 Matt Hoffman –Team captain, LandSAT construction Devlin Thyne – FieldSAT/GPS SAT construction, testing David Fifield – FieldSAT captain, all programming and code Evan Spitler – Aid in LandSAT construction, FieldSAT testing Jason Igo – Support and testing Matt Hanley- Support and advising

2. 2 Mission Statement & Goals: To compete the LandSAT, FieldSAT, and GPSSAT missions in a creative and efficient manner and to create an intuitive post-flight visualization LandSAT To land, deploy upright and photograph its location FieldSAT To record orientation data during flight GPSSAT To record 4-D positional data during flight

3. 3 Benefits to NASA: LandSAT Provides a reliable, low cost upright delivery method for research vehicles Provides a stable platform for instrumentation FieldSAT Provides an accurate log of craft orientation data GPSSAT Provides a log of global positioning data Integrated Field and GPS data: Allows correlation of short-term inertial data and long-term position data

4. 4 Initial Design: Geometry Tetrahedron consisting of four triangular panels Self-corrects position upon opening Construction Foam core composite with carbon fiber tube reinforcement.

5. 5 Payload size was increased by 50% External framework of pre-cast tube was discarded Carbon fiber reinforcement formed in place during panel construction Pneumatic actuators were used High power-to-weight ratio Low cost Final Design:

6. 6 Electronic package incorporates all components on one board Controls the camera Actuates the pneumatic deployment Records GPS location data Records 3-axis acceleration data Records 3-axis angular velocity data Final Design:

7. 7 The AVR microcontroller firmware is written in C using AVR-Libc actuator control sensor readings records measurements designed for small embedded systems (8 MHz, less than 2 KB RAM) The on-ground analysis programs (3D visualization and others) are written in Python with an emphasis on rapid development and portability All source code is freely available Final Design:

8. 8 Expected Results: The GPS unit receives latitude\longitude\altitude\time data This data can later be imported into map\satellite software that shows the exact position with respect to the Earth

9. 9 Expected Results: Acceleration and angular velocity data is logged This data is later incorporated into a computer simulation demonstrating the object’s orientation at any given time during the mission

10. 10 Expected Results: Upon landing the unit will unlatch and open The geometry of the payload allows it to open right side up regardless of initial landing orientation

11. 11 Expected Results: After opening, the package will take pictures of the landing site

12. 12 Level of Readiness: Finished package was thoroughly abuse tested along with lengthy hardware functionality tests and multiple full cycle operation tests We are ready to launch

13. DemoSat V: Questions?

14. 14Construction: 1. High density foam core. 2. Foam is cut to shape, air tank is installed. 3. Core is wrapped in epoxy glass. 4. Panel is vacuum bagged.

15. 15 5. Finished panel is drilled to accept hinges. 6. Hinges are coated with Teflon tape to control epoxy adhesion. 7. Hinges are installed. 8. Panels are connected with hinges.