IARU Amateur Satellite Frequency Coordination
 
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GuaraniSat-2 Updated: 02 Feb 2026   Responsible Operator Eladio Javier Ferrer Torres ZP6MET
Supporting Organisation Agencia Espacial del Paraguay  
Contact Person zp6met@gmail.com.nospam  
Headline Details: The GuaraniSat-2 is a project developed by the Paraguay Space Agency (AEP) as a successor of the GuaraniSat-1 satellite, which was developed in Kyushu Institute of Technology under the Joint Global Multi-Nation Birds Satellite project. The primary goal of GuaraniSat-2 is to promote amateur radio satellite operations and project-based learning strategies, thereby enhancing awareness of satellite capabilities among the amateur radio community and the general population, and fostering STEM in high school students through amateur radio satellite activities. By developing this 3U CubeSat, we aim to provide a global opportunity for the amateur radio community, as well as hands-on training for students to develop key satellite subsystems domestically, paving the way for a sustainable Paraguayan space program in collaboration with other institutions. This satellite has two main missions objectives, one is regarding Amateur mission in order to provide UHF/VHF band communication services to the amateur radio community using a 3U CubeSat. The other is regarding Educational mission, to foster student engagement in STEM projects through educational missions of interest to the amateur radio community. In our website, it can be viewed about this: https://aep.gov.py/wp-content/uploads/2025/07/GUARANISAT-2_Overview_V2.pdf Now, it is described briefly about them Amateur Mission consists of: 1) APRS digipeater mission: It comprises a communication board payload providing services to the amateur radio community worldwide by relaying (digipeating) APRS (Automatic Packet Report System) packets and storing (Store & Forward) APRS packets for amateur radio contest purposes when required. This system improves APRS coverage and engagement within the amateur radio community. This board is the same as the APRS payload winner of the BIRDS-X APRS payload competition, organized by Kyushu Institute of Technology, and is currently onboard the Dragonfly satellite for the provision of APRS services to the amateur radio community. 2) LoRA mission: A communication board based on LoRa (Long Range) for amateur radio purposes, which utilizes chirp spread spectrum (CSS) modulation, enabling long-distance data transmission with low power consumption and providing strong resistance to interference, allowing amateur radio users to leverage and test the advantages of LoRA on amateur radio bands by sending its packets as a store-and-forward service, with an acknowledgement signal send back to the user once is received onboard. Educational Mission consists of: 3) MUA mission: This mission aboard GuaraniSat-2 is primarily focused on generating scientific data on space radiation in the region of the South Atlantic Anomaly, leveraging Paraguay’s strategic location to engage students, educators, and institutions in authentic space research. This payload aims to monitor the impact of space radiation in the South Atlantic Anomaly region on HF Band Propagation, specifically focusing on the weakening of the magnetic field and its direct effects on the ionosphere, which is responsible for reflecting HF radio waves, such as unexpected reflections occurring on 6 m, 10 m, and 12 m bands. The mission is designed to provide meaningful insight into particle radiation while fostering active participation from the global amateur radio long-range, low-power communication technologies, allowing students and enthusiasts to design, implement, and operate communication in these low-cost networks based on LoRA on amateur radio bands. Upon receiving a packet, it validates it to ensure compliance with the established structure and then stores it in the satellite's memory. Subsequently, the payload transmits a received packet confirmation. The stored packet can later be downloaded on the ground station and will be published on the project website. Similar to the APRS digipeater mission, contests will be held to promote the LoRa mission, raising awareness among the amateur radio community and school students. 3. MUA mission: The M.U.A mission (Monitoring Unit of the South Atlantic Anomaly) aboard the GuaraniSat-2 nanosatellite aims to study the radiation environment inside and outside the South Atlantic Anomaly (SAA), a critical region that affects both satellite systems and radio communications across the southern cone of South America. Through onboard sensors, data on energetic particles penetrating the ionosphere especially over Paraguay will be collected and transmitted. This information, along with satellite telemetry, will be publicly accessible to the global amateur radio community, allowing them to decode signals, analyze propagation effects, and engage in collaborative reception campaigns. Since the information from the payload can be used to evaluate the impact of the South Atlantic Anomaly region on HF Band Propagation, as the specifically focusing on the weakening of the magnetic field and its direct effects on the ionosphere, which is responsible for reflecting HF radio waves, such as unexpected reflections occurring on 6 m, 10 m, and 12 m bands, the data will be available as soon is downloaded from the satellite into the mission website. In any case, amateur radio users can download data from the satellite when it is transmitting in response to ground station commands. 4. SCP mission: This payload enables experimentation with space imagery processed directly onboard by a Snapdragon co-processor, offering students and amateur radio operators a unique opportunity to access real data generated in orbit. The images captured by a FLIR thermal camera are not intended for systematic Earth observation but for technical, educational, and experimental analysis, fostering active learning in image processing, embedded computing, and remote instrumentation. In Paraguay, SCP team will organize events for downlinking image data to promote the use of amateur radio and strengthen engagement with the global amateur radio community. Furthermore, Amateur radio operators worldwide will be able to receive and interpret these images and process data through accessible UHF amateur bands, allowing them to take part in decoding and analysis activities. Amateur radio operators worldwide are invited to receive CW data and UHF telemetry packets and share telemetry with our organization. All GuaraniSat-2 mission data (APRS, LORA, MUA, and SCP) will be accessible, and submitting correct data will earn a GuaraniSat-2 QSL card. For details, visit: https://aep.gov.py/wp-content/uploads/2025/07/GUARANISAT-2_Communication_plan-20250723.pdf Proposing a UHF transmitter for CW beacon and housekeeping,also a LoRA transmitter on UHF plus APRS on VHF. Planning a SpaceX launch from Vandenberg Q4 2026 into a 550 km polar orbit.
Application Date: 15 Oct 2025   Freq coordination completed on 02 Feb 2026

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