IARU Amateur Satellite Frequency Coordination
 
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Estelle Updated: 11 May 2015   Responsible Operator Tõnis Eenmäe ES5TF
Supporting Organisation QB50 & University of Tartu  
Contact Person es5ec@estcube.eu.nospam  
Headline Details: The 2U ESTELLE will accommodate the QB50 scientific payload and our experimental miniaturized cold gas thruster module. This mission is a partnership between Estonia, Sweden, Latvia and Slovenia. The general hardware design will improve upon the single unit ESTCube-1, launched on 7th of May 2013.Cold gas propulsion system is seen as a very attractive solution for the CubeSats, as the standard limits the use of pyrotechnics and high-pressure systems. The propulsion module, developed by NanoSpace, uses butane under 2-5 bar pressure. This should be in accordance with the next CubeSat standard revision. The 0.3 unit module will be located at the opposite end from the QB50 payload. It contains four thrusters, which are placed on the same side for maximum delta-v capability (40 m/s). This delta-v capability can be used to alternate the orbit in order to enhance the scientific return of the QB50 mission by extending the satellite’s lifetime. An experimental high data rate transmitter (HDRT) is envisaged if it fits within the system margins to include it on-board the satellite. It would operate on S, C or X band amateur radio frequencies and use BPSK modulation. Up to 10 Mbit/s data rates can be achieved with 3 W of operating power. Proposing a UHF GMSK/BPSK downlinks up to 19k2,bps and a series of HDRT experiments including a 2.4GHz downlink using GFSK/BPSK at up to 1Mbps, a 5.8GHz downlink using GFSK and BPSK at up to 10Mbps and a 10GHz downlink at up to 10Mbps **** This project has been cancelled**
Application Date: 04 Dec 2013   Freq coordination completed on

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