Satellite Research Centre Reaching for the Stars Kay-Soon Low Centre Director School of Electrical & Electronic Engineering Nanyang Technological University 1
Satellite Programs @SaRC 2013 2014 2015 2016 2011 VELOX-I VELOX-PII VELOX-PIII VELOX-CI X-SAT VELOX-II AOBA- 2 VELOX-PI VELOX-III
3
4
X-SAT was launch on 20/4/11 PSLV-C16 on Launch Pad 5
6
VELOX-P Satellite Program Objectives Train engineers & technology demonstration Fault tolerant power management system Attitude determination & control algorithms Fine sun sensor Flight software and ground station Dimensions Mass Expected lifetime Orbit Attitude determination and control system On-board data handling Communications Power subsystem Structure Thermal control Experiment Ground segment 100 x 100 x 113.5 mm 1330 grams 12 months Sun-synchronous LEO, altitude 600 km 3-axis stabilized: 1 GPS receiver, 2 IMUs, 1 dual-fov sun sensor, 5 coarse sun sensors, and 3 magnetic torquers 100MHz 8051 MCU, 2Gb SD card, UART and I2C data interfaces 9600bps BPSK downlink / 1200bps AFSK uplink, UHF & VHF dipoles 5 GaAs panels for 2.4W peak, 2600mAh Li-ion battery Hard anodized Al. 7075 chassis, with stainless steel load bearing parts Battery heaters Technology demonstration platform, new dual-fov sun sensor, fault tolerant power management system, ADCS Ground station in NTU with UHF/VHF high-gain cross Yagi-Uda antennas 7
VELOX-P FM flat sat Sun sensor testing Power management system Complete pico-satellite 8
Sun simulator setup Solar array setup Solar panel testing Sun simulator setup Air bearing setup 9
VELOX-P FM flat sat Complete pico-satellite 10
11
VELOX-I Satellite Program Mission Objectives Training of undergraduate and postgraduate students in a team based multidisciplinary program Evaluate in-house design and built subsystems in orbit: reaction wheel, multi-layer insulator, sun sensor radiation harden by design imaging sensor extensible telescopic mechanism short range inter-satellite communication using zigbee advanced control algorithm fault tolerant power management system GPS operation 12
VELOX-I Mass Dimension Specifications 4088g (VELOX-I), 193g (VELOX-PIII), total 4281 grams 100mm x 100mm x 340mm (VELOX-I), 60mm x 70mm x 30mm (VELOX-PIII) Structure Hard anodized Al. 7075 Launch Orbit ADCS Power Payloads In orbit since 30 Jun 2014 by PSLV C23 Sun-synchronous LEO, altitude 650km 3-axis stabilized, 3 reaction wheels, torquers, GPS, 2x sun sensors, 2x IMU 5.2 Ah Li-Ion, 3J GaAs 28.8Wp CMOS image sensor with extensible mechanism, ADCS algorithm, GPS, short range communication using zigbee Status Antenna, solar panels and optics deployed after separation. Ground contact established in first ground pass. Completed launch and early operation In-house developed subsystems validated in orbit: reaction wheel, MLI, deployment mechanism, communication system Missions conducted: Whole orbit data download, GPS, short range communication, cmos image sensor. 13
14
15
X-SAT 20 Apr 2011 X-SAT ground station VELOX-P 2014 VELOX-PII 21 Nov 2013 CANSAT-I Feb 2012 CANSAT-II 30 Mar 2012 VELOX ground station VELOX-II 2015 VELOX-I Q1 2014 CANSAT-III @27km 6 Sep 2013 Remote Sensing Camera Weather Satellite 2015 Sounding Rocket, May 2012, 2013 16
Past DIP programs 2014/15 Sem 1 Develop of Radiation-harden-by-design SPI Data Bus 5 Software Define Radio (SDR) Technique in GPS/GNSS Receiver Development 10 Smartphone Satellite 10 Remote control and stabilization of a camera system for near space applications 10 Design and development of a Comeback Cansat 10 2013/14 Sem 2 A Simulator For Satellite And High Altitude Vehicle For Remote Sensing Application 5 Design And Development Of An Imaging System For Near Space Application Using A High Altitude Balloon 10 2013/14 Sem 1 2011/2012 Automate tracking of satellite using a telescope Design and Development of a Cansat Real time tracking of satellite and visualization system Design and Development of a CanSat Nano-satellite ground station 8 8 10 10 10 Software-hardware co-processing imaging subsystem for Nanosatellites 10 17
DIP satellite programs Satellite is a multi-disciplinary team based engineering program. It covers all field of electrical & electronic engineering such as power supply system design, communication system, sensor & actuator design, control engineering, electronic circuit, embedded system etc. In each year, we offer about 5 projects covering several topics. Last year we have some of the following programs: Cansat is an electronic circuit trying to mimics the function of a satellite with its embedded electronics put inside a drinking can with a parachute. High altitude balloon flying at 10-30km height (known as near space) with sensors and camera. Software design radio for GPS Smart phone based pico-satellite development Electronic circuit design for radiation space environment More details can be found here: http://www.sarc.eee.ntu.edu.sg/programmes/usp/pages/design- Innovation-Project.aspx 18
Satellite Ground Station by DIP Ground station software 19
CANSAT, Smart Phone Satellite by DIP CANSAT Smart phone satellite Sun simulator setup Satellite Attitude Control DIP Solar panel testing Sun simulator setup Air bearing setup Making magnetic torquer 20
www.sarc.eee.ntu.edu.sg Supervisors: Low Kay Soon, Chen Shoushun, Ling Keck Voon, Erry Gunawan, Sheel Aditya, Michelle Shao, Wesley Tan, Raymond Tsai 21