Development of a Low Cost High Alititude Research Platform

Abstract

The development of a low-cost high-altitude platform allows for an increase in high altitude research capabilities for K-12 schools and universities. The High-Altitude Research Platform (HARP) allows for experiments to be launched to an approximate altitude of 110,000 ft (20 miles) allowing for near space environment of extreme temperature change and low-pressure. The system is composed of three main components: the payload, the experiment carriage, and the base station. The payload contains a Raspberry Pi 3 B+ which is used as the main flight computer. The Raspberry Pi is connected to a GPS, temperature, and pressure sensor for datalogging and provides the sensor data to the requesting experiments. The system has multiple types of communication datalinks to maintain connection with the payload. These include a 5.8GHz modem and a 900MHz modem for two-way communication. There is also a one-way low bandwidth APRS tracking system which aids in recovering the payload allowing it to be reusable. The APRS tracking system also allows real-time tracking of the HARP on any internet connected device such as a smartphone. The modems connect to a satellite dish and antenna on the base station with active tracking. This enables high data rate communication up to 30 mile range after the balloon has launched. The experiment carriage accommodates up to twelve 100mm by 100mm ABS cubes, which house individual experiments. These cubes are easily secured into the carriage for launch. The experiments can wirelessly communicate with the base station through a Wi-Fi network hosted on the flight computer. This allows control of the experiments in real time during flight. The re-usability and low cost of the components allows universities and K-12 schools to learn by conducting their own research. The small scale of the system allows for flexibility in the experiments that can be launched. With funding from NASA and the reusable nature of this system, we can offer free launch services to students and researchers. This system brings high altitude research into reach for universities and K-12 schools by being low-cost and rapid. It can be launched at any time allowing for frequent experiments to be conducted. By conducting these experiments, students will be inspired to pursue education and research aligned with NASA�s mission.