Test Payload for the ER-2 experimental plane XCUBE standard. Payload stores environmental data and syncs RTC continually with plane’s flight computer. Followed NASA systems engineering procedures. Designed schematic and layout of DC-DC PMIC, LVDS SPI, RS422 UART, and raspberry pi connection using Altium. Debugged MSP430 code using Code Composer Studio, and added functionality to Iridium packet handler (python). Assembled with Sierra Circuits. Added silkscreen drawings to add to project personality.