OLHZN-10 was the tenth high altitude weather balloon flight for Overlook Horizon High Altitude Balloons. This flight launched on March 21, 2018 at 4:00pm ET (20:00 UTC). The focus of this flight was to test our new miniature Arduino Pro Mini radio tracking system. This new micro-system is intended to allow us more flexibility for future flights. We intend to use this system for multiple purposes due to it’s inexpensive nature.