PRESENTATION AT ESA/ESTEC NOORDWIJK, NL, 22 JAN 2008 D-STAR BASED STUDENT CUBESAT OF UNIVERSITY OF LIEGE (LEODIUM) Stefania GALLI Jonathan PISANE, ON7JPD, Belgium ESTEC.1
UNIVERSITY OF LIEGE (ULg) BELGIUM ESTEC.2
LONG-TERM OBJECTIVES (1): HANDS-ON SATELLITE EXPERIENCE FOR STUDENTS ESTEC.3
LONG-TERM OBJECTIVES (2): SERIES OF CUBESATS FOR SCIENTIFIC EXPERIMENTS Granular materials (Prof. Vandewalle) MEMS (ULg - CSL) ESTEC.4
SHORT-TERM PLAN World s first: CubeSat + D-STAR Corresponding D-STAR ground station and ground repeater ESTEC.5
OUTLINE What? How? How much? Who? When? ESTEC.6
MAIN SYSTEM COMPONENTS CubeSat VHF UHF VHF C UHF B Controller Gateway G Internet User ESTEC.7 Ground station Repeater User
MAIN FEATURE OF PROJECT: D-STAR Amateur-radio digital radiocommunications protocol Simultaneous voice & data transmission Complete routing capacity, including roaming Amateur radio over Internet 3 frequencies and 2 data rates - 144 MHz (2 m, VHF), 4.8 kbit/sec - 440 MHz (70 cm, UHF), 4.8 kbit/sec - 1.2 GHz (23 cm, SHF), 4.8 kbit/sec or 128kbit/sec Open protocol Cross-band capability ESTEC.8
COMPARISON BETWEEN D-STAR AND TRADITIONAL - FM AUDIO SIGNALS D-STAR vs. FM ESTEC.9
SITUATION 1: USERS IN CUBESAT S FOOTPRINT CubeSat Uplink: 145 MHz Downlink: 435 MHz User A CubeSat footprint No repeater Anywhere in world: Europe, US, User B ESTEC.10
ICOM IC-E2820 2 receivers 1 transmitter TYPICAL USER RADIO EQUIPMENT (FIXED OR MOBILE) VHF: 144 MHz (2 m) UHF: 440 MHz (70 cm) ESTEC.11
SITUATION 2: USING CUBESAT AND ULG REPEATER CubeSat Uplink: 145 MHz Downlink: 435 MHz User A ESTEC.12 VHF UHF Ground station CubeSat footprint VHF C UHF B Controller Gateway G Repeater D-STAR zone ULg User B
D-STAR GROUND REPEATER ESTEC.13
GROUND EQUIPMENT AT ULG-EECS (MONTEFIORE INSTITUTE) Satellite tracking antennas Montefiore ham radio station (ON4ULG) Antenna tower ESTEC.14 D-STAR repeater (ON0ULG) & antennas
SITUATION 3: USING CUBESAT, ULG REPEATER, & INTERNET CubeSat User A VHF UHF Ground station VHF C UHF B Controller Gateway G Repeater Internet 1.2 GHz A VHF C UHF B Controller Gateway G Repeater User B ESTEC.15 D-STAR zone ULg D-STAR zone Dallas
D-STAR REPEATERS IN THE USA ESTEC.16
FIRSTS! Belgium s first radio contact using D-STAR repeater (3 January 2008) World s first CubeSat using D-STAR ESTEC.17
OUTLINE What? How? How much? Who? When? ESTEC.18
CUBESAT Structures and mechanisms Thermal system ADCS C&DH Power system Communication ESTEC.19
CUBESAT Structures and mechanisms Thermal system ADCS C&DH Power system Communication ESTEC.20
STRUCTURES AND MECHANISMS CubeSat kit Flexible on the deployment system ESTEC.21
CUBESAT Structures and mechanisms Thermal system ADCS C&DH Power system Communication ESTEC.22
ATTITUDE DETERMINATION AND CONTROL SYSTEM ADCS Payload ESTEC.23
ATTITUDE DETERMINATION AND CONTROL SYSTEM ADCS Payload ESTEC.24
CUBESAT Structures and mechanisms Thermal system ADCS C&DH Power system Communication ESTEC.25
POWER SYSTEM (1) POWER GENERATION POWER STORAGE GaAs solar cells Efficiency ~ 27% Lithium-ion battery ESTEC.26
POWER SYSTEM (2) RAAN = 0 Argument of perigee = 0 Enough power ESTEC.27
CUBESAT Structures and mechanisms Thermal system ADCS C&DH Power system Communication ESTEC.28
COMMUNICATION 145 MHz Uplink DATA & TC LNA M IF GMSK demodulator D-STAR decoding VOICE + FEC 435 MHz Telemetry µp 435 MHz Downlink PLL D-STAR stream µp CW 100 mw 435 MHz On-board computer TM / TC PA M IF GMSK modulator D-STAR encoding VOICE + FEC ( Unchanged ) FEC = Forward Error Correction ESTEC.29 DATA & TM
CUBESAT Structures and mechanisms Thermal system ADCS C&DH Power system Communication ESTEC.30
COMMAND AND DATA HANDLING Radio amateur data and voice signal D-STAR Command Housekeeping RADIO BEACON ESTEC.31
CUBESAT Structures and mechanisms Thermal system ADCS C&DH Power system Communication ESTEC.32
THERMAL SYSTEM Thermal balance to be studied: exploit available space ESTEC.33
TESTS Electromagnetic compatibility Thermal environnement Vibrations EECS ESTEC.34
OUTLINE What? How? How much? Who? When? ESTEC.35
ESTIMATED COSTS 40,000 Internal funding Industrial sponsorship UHF VHF Ground station VHF B UHF C Controller Gateway G Repeater 400-800 10,000 10,000 ESTEC.36
OUTLINE What? How? How much? Who? When? ESTEC.37
SCHEDULE Ground station and repeater installed at ULg Leodium ready to be built Phase A Phase B1 Phase B2 Phase C & D 11.07 03.08 06.08 12.08 06.09 07.09 Mission defined Critical elements defined ESTEC.38
OUTLINE What? How? How much? Who? When? ESTEC.39
TEAM Liège Science Park (Spacebel, ) ULg - CSL ULg - EECS ULg - LTAS ESTEC.40
TEAM EECS Dept. Prof. Jacques Verly ON9CWD 100 persons Astrophysics Dept. Prof. Jean-Pierre Swings STUDENTS - Jonathan Pisane (EECS), ON7JPD - Stefania Galli (LTAS) - Philippe Ledent (EECS) - Amandine Denis (PhD, LTAS) - Jean-François Vandenrijt (PhD, CSL) Prof. Gaetan Kerschen 120 persons LIEGE ESPACE Prof. Pierre Rochus 100 persons Luc Halbach ON6JY ESTEC.41
TEAM EECS Dept. Prof. Jacques Verly ON9CWD 100 persons Astrophysics Dept. Prof. Jean-Pierre Swings STUDENTS - Jonathan Pisane (EECS), ON7JPD - Stefania Galli (LTAS) - Philippe Ledent (EECS) - Amandine Denis (PhD, LTAS) Prof. Gaetan Kerschen 120 persons LIEGE ESPACE - Jean-François Vandenrijt (PhD, CSL) Prof. Pierre Rochus 100 persons Luc Halbach ON6JY ESTEC.42
TEAM EECS Dept. Prof. Jacques Verly ON9CWD 100 persons STUDENTS - Jonathan Pisane (EECS), ON7JPD - Stefania Galli (LTAS) Astrophysics Dept. Prof. Jean-Pierre Swings - Philippe Ledent (EECS) - Amandine Denis (PhD, LTAS) - Jean-François Vandenrijt (PhD, CSL) Prof. Gaetan Kerschen 120 persons LIEGE ESPACE Prof. Pierre Rochus 100 persons Luc Halbach ON6JY ESTEC.43
TEAM EECS Dept. Prof. Jacques Verly ON9CWD 100 persons Astrophysics Dept. Prof. Jean-Pierre Swings STUDENTS - Jonathan Pisane (EECS), ON7JPD - Stefania Galli (LTAS) - Philippe Ledent (EECS) - Amandine Denis (PhD, LTAS) Prof. Gaetan Kerschen 120 persons - Jean-François Vandenrijt (PhD, CSL) LIEGE ESPACE Prof. Pierre Rochus 100 persons Luc Halbach ON6JY ESTEC.44
CONCLUSION Innovative communications system Simultaneous digital transmission of voice and data Routing and roaming Worldwide connectivity via internet Belgium s first D-STAR repeater World s first D-STAR satellite ESTEC.45
FINAL WORD Challenging schedule but Motivated team Simplicity Strong academic and industrial support ESTEC.46
D-STAR BASED STUDENT CUBESAT OF UNIVERSITY OF LIEGE (LEODIUM) Stefania GALLI Jonathan PISANE, ON7JPD www.leodium.ulg.ac.be Thanks for your attention ESTEC.47