Appel, Nicolas

Gutsmiedl, Johannes

Günzel, Patrick

Janke, Florian

Klesbye, Jonis

Langer, Martin

Losekamm, Martin

Perakis, Nikolas

Pöschi, T.

English

DigitalCommons@USU

FKZ 50RM1509www.move2space.deThe Evolution of the CubeSat Program MOVEM. Langer*1, N. Appel1, P. Günzel1, J. Gutsmiedl1, F. Janke1, J. Kiesbye1, M. Losekamm1,2, N. Perakis1, T Pöschl2*Phone: +49 89 289 15995, martin.langer@tum.de1Technische Universität München, Institute of Astronautics, Germany2Technische Universität München, Physics Department E18, GermanyAbstract   The CubeSat program MOVE, for “Munich Orbital Verification Experiment”, was initiated in 2006 at the Institute of Astro-nautics (LRT) of the Technische Universität München (TUM), Germany. The primary objective of the program is the hands-on education of students. The first CubeSat of the program, called First-MOVE, was launched on November 21st, 2013. The programs’ second CubeSat, MOVE-II, is currently under development and shall be a 2U satellite, thus enabling the scientific use of nano-satellites beyond the 1U satellite bus of First-MOVE. MOVE-II will evolve the subsystems that were developed in-house. In terms of the scien-tific payload for the MOVE-II mission, the 1U Multi-purpose Active-target Particle Telescope (MAPT), developed by the Physics Department E18 of TUM, aims to measure the flux of antiprotons trapped in the Earth’s magnetic field at very low energies. The 1U-sized bus of MOVE-II with its flexible interfaces is designed to accommodate a multitude of payloads. MOVE-II is due to be launched into space late 2017.Scientific Objective• Measure the flux of antiprotons trapped in the inner Van Allen belt in the 25 to 100 MeV energy range   (Antiproton Flux in Space mission)• Complementary to measurement of PAMELA experiment [1]• Understanding the interactions of high-energy cosmic rays with Earth’s atmosphere and magnetosphere (trapping, transport mechanisms)The Multi-purpose Active-target Particle Telescope (MAPT)• 900 channel active-target tracking particle detector• Active volume: scintillating plastic fibers• Photodetectors: KETEK silicon photomultipliers• Custom FPGA-based data acquistion electronics• Sensitive to ions in 10 MeV/n to 500 MeV/n range• Identification of ion species using Bragg curve      spectroscopy technique• Successfully tested on BEXUS 18 balloon mission [2]10 100 100010-310-210-1100101102103Particleflux[GeVm2ssr]-1Kinetic energy [MeV]p (x 10-6)pbar Selesnick, 2007SAA PAMELAGCR PAMELAAFISAttitude Determination & Control• Determination with magnetometers and sun sensors• Control based on magnetic torquers, etched into PCBsElectrical Power Supply• Deployable solar panels in X-wing          configuration• Average power 4 W at 600 km / 60°• Active overcurrent and overvoltage protec-tion for each subsystemRe-Usable Deployable StructuresSMARD• Non-destructive & re-usable hold-down and release mechanism based on shape memory alloy technology• Reset by mechanical spring, facilitating quick and easy testing• Successfully tested on REXUS 18 sounding rocket [3]Redundant Antenna Deployment Mechanism• Antennas folded into deployment structure• Nominal deployment via solar panels• Back-up deployment via +Z-movement of structureEvolved Command and Data Handling• Full functionality of MOVE-II’s on-board computer required at all times • High degree of failure tolerance, assuring dependability while using COTS hardware• Centralized system architecture based on an application processor core• Autonomous software-independent debugging and diagnostic functionality• Based on the Linux operating system and strong software-driven error protec-tion• Minimization of error sources through software re-use and error correction [1] Adriani, O. et al. (2011). The Discovery of Geomagnetically Trapped Cosmic-Ray Antiprotons. The Astrophysical Journal, 737(2):L29.[2] M. Losekamm et al., ”AFIS: A New Instrument for Cosmic Radiation Studies on Bexus 18 and Future Nanosatellite Missions”, Proc. ‘22nd ESA Symposium European Rocket & Balloon Programmes and Related Research’, 7–12 June 2015, Tromsø, Norway (ESA SP-730, September 2015).[3] M. Grulich et al. “SMARD-REXUS-18: Development and Verification of an SMA Based CubeSat Solar Panel Deployment Mechanism”, Proc. ‘22nd ESA Symposium European Rocket & Balloon Programmes and Related Research’, 7–12 June 2015, Tromsø, Norway (ESA SP-730, September 2015).Evolved 1U BusAntiproton DetectorGeneric Payload Interface+ZImproved Communications• Full-duplex UHF/VHF transceiver• Experimental S-Band transceiver (half-duplex, up to 1 Mbit/s)• Novel data-link layer protocol     (Nanolink)• Stainless steel half-dipole UHF/VHF     antennas• S-band patch antenna

The Evolution of the CubeSat Program MOVE

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The Evolution of the CubeSat Program MOVE

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