Christian Zempel Eric Stackpole Gavin Hagiwara Xander Wroblewski Department of Mechanical Engineering IRIS-VIEWS SHOT II 6/11/10 Verification of In-flight Environmental Wear on Subsystems

Mission Overview Purpose – The purpose of this experiment is to test and verify the performance of several key subsystems that will be used on Santa Clara University’s IRIS nanosatellite. – Monitoring satellite in near space conditions: altitude, temperature, and pressure AVR sats – Custom built multi-purpose microcontrollers that will be used on IRIS – Send in-flight temperature and current data – Packets received versus Packets sent Beacon – Similar antenna and ground plane characteristics and link budget to that of IRIS – Measuring signal strength

Structural Design Main Components – ¼ inch Foam Core Poster Board – ¼ inch Packing Foam – Acrylic Baseplate – Screen Material – Hot Glue – Aluminum Tape – Tape Measure – Velcro/Adhesive fasteners Assembly and Design Process – Measured, cut, and assembled outer structure – Coated each wall with two layers of packing foam – Finalized hole layout on acrylic baseplate and installed components – Installed battery pack with velcro – Slid acrylic baseplate into foam notches – Created holes for balloon rope attachement in top and bottom through center of mass – Connected electrical components and installed antenna – Cut access hatch and sealed the lid

Test Program The whip test The drop test The stair pitch test The cooler test The tests performed yielded positive results, suggesting that the survivability of the main structure and components within is likely. User Guide Compliance -Mass -1680g < 1700g -String Attachment

Expected Results Functionality Will everything continue to work? Packets received/ packets sent Are enough good packets being received? Telemetry Are the packets we’re receiving correct?

Packets Received/ Packets sent Empirical data based on GeneSat/ PharmaSat passes. Theoretical data based on link budget. BOE = 1/10000 Link 45° = 26dB Expected number of “good” packets/ min ≈ 5

Telemetry Information sent: Call Sign Time Temperature Current consumption “Dummy data” Of good packets, how many had erroneous data? GeneSat1.org00454B B F0B00147A2A D06

Expected Results Receive signals from the satellite – Ensures the range and quality of the hardware – Ensures proper environment for hardware Receive health data packets from the satellite – Ensures an optimal range of the hardware – Further tests the environment on the hardware Receive useful health data from the satellite – Tests the correctness of the software in a longer term field test. – Tests the capabilities of the satellite to truly monitor itself in a space environment.