IARU Amateur Satellite Frequency Coordination

 
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FossaSat-1 Updated: 27 May 2019   Responsible Operator Julian Ismael Fernandez Barcellona EA4HCD
Supporting Organisation AMSAT-EA  
Contact Person julian.ismael.fernandez@gmail.com.nospam  
Headline Details: The FossaSat-1 Satellite has a 5x5x5cm structure and a total mass of 250gram. It has a variety of objectives/missions that are trying to be accomplished. The first is the general development of miniaturized and inexpensive satellite systems for space applications using off the shelf components. As amateurs, it is a huge step forward for our nation being able to prove that we can successfully design, manufacture & deploy a satellite in orbit for amateur investigation and use with a limited budget. We will also be testing a new solar panel mechanism, making this satellite the smallest to have deployable solar arrays. These solar arrays will additionally increase the radar reflectivity significantly to that of a standard cubesat. The second is the promotion & involvement of students in aerospace development on an international level, giving them the opportunity to test their hardware and software experiments on the satellite. We will be hosting STEM workshops & competitions for secondary students to participate in, a full section of the satellite is dedicated to these experiments for educational research. The third and main mission of the satellite is the testing of a new experimental RF chirp modulation called LoRa, this new modulation hugely increases the link budget, reduces the power consumed and reduces the cost of receivers. It has successfully been tested before in orbit aboard TTNSAT-1 for a short period of time though we are trying to prove it using dedicated hardware. Thanks to LoRa we are able to receive and send telemetry & commands with a ground station using a dipole antenna and a simple SDR or LoRa module. The output power from the transmitter required for the correct reception during a pass is also very low at well under 100mW, being spread spectrum at such low power it poses no interference risk. It operates at a considerable level below the noise level of other systems and would cause no interference to weak narrowband signals. Students & Amateurs will be able to receive telemetry from the satellite with inexpensive hardware, expanding & promoting the amateur satellite community in the youth. Uplink challenges will also be carried out with rewards for amateurs. All we do is completely open source, all information regarding the design of the satellite & how to decode its information will be clearly laid out & hosted by us, promoting its use. Millions of LoRa devices are in use and they are widely available and easy to build by amateurs. We will provide decoding software for SDR use in order to allow anyone to decode LoRa using common existing hardware & host software for users to submit telemetry data, making all data public and rewarding users with certificates & awards. Proposing UHF downlinks using FSK RTTY 45 BAUD ITA2, 100mW 183hz Shift and LoRa 125kHz, Chirp Spread Spectrum Modulation, 180 bps, 100mW. Planning a Q4 2109 launch into a 385km SSO **A downlink on 436.700 MHz has been coordinated**
Application Date: 29 Oct 2018   Freq coordination completed on 27 May 2019

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