In-Orbit Performance of LoRa for Internet of Things Communication on MicroOrbiter-1 Satellite

The integration of Internet of Things (IoT) technology with satellite communications has reformed global connectivity, especially in remote regions that lack terrestrial infrastructure. Recent advancements in optimizing LoRa parameters for satellite-based IoT communications have boosted research in this field. Building on this foundation, the MicroOrbiter-1 satellite developed by MicroOrbiter Inc. in collaboration with the Kyushu Institute of Technology (Kyutech) enhances LoRa-based IoT capabilities in a 1U CubeSat platform. This paper presents the in-orbit performance evaluation of the MicroOrbiter-1 satellite’s LoRa-based communication system on the 920 MHz frequency band with three Ground Sensor Terminals (GST) located in Kyutech (Japan), Rancabungur (Indonesia) and Vermont (USA). Key performance metrics such as Received Signal Strength Indicator (RSSI), Spreading Factor, and transmission errors, were analyzed across these locations. The results demonstrated the range of -112 dBm to -127 dBm signal strength for successful communication at low spreading factors. Temporal analysis was conducted using the System Tool Kit to categorize the data received from each terminal. While facing the challenges of power limitation and the lack of an attitude control determination system, the findings in the in-orbit performance analysis of the MicroOrbiter-1 satellite provide valuable insights for optimizing LoRa communication for future satellite missions, especially for CubeSats.