VELOX-II Nano-satellite
VELOX-II is an advanced nano-satellite [9kg (satellite), 4kg (deployer), total 13kg]. It is also the second nano-satellite built by NTU. This project is in collaboration with Addvalue Innovation Pte Ltd. Besides the primary communication payload, it carries a GPS payload for precision navigation and a fault tolerant electronic circuit.
Objectives
- To design, build and launch the first 6U nano-satellite in the world with inter-satellite communication capability between a LEO and higher orbit satellites
- To demonstrate data downlink anywhere anytime in orbit without passing the ground station.
- To demonstrate precision navigation and fault tolerant electronics
![VELOX-II Nano-satellite VELOX-II Nano-satellite](/images/librariesprovider112/satellite/viip199a81039-7771-4101-8e8d-ea34810a4d44.jpg?sfvrsn=c8014a3c_5)
Dimensions | 120mm x 246mm x 340.5 mm (stowed) |
---|---|
Mass | 9kg (satellite), 4kg (deployer), total 13kg |
Orbit | Near equatorial LEO orbit, 550km altitude |
Attitude determination & control system | 3-axis stabilized and controlled with 1 GPS receiver, 2 IMUs, fine and coarse sun sensors, 3 magnetic torquers and 3 reaction wheels |
On-board data handling | Mainboard with 100 MHz 8051 MCU, 2Gb SD card, UART and I2C data interfaces |
Communication | 9600bps BPSK downlink / 1200bps AFSK uplink, UHF & VHF dipoles ( VELOX-II Beacon Information) |
Power subsystem | 2 deployable GaAs 6U panels (2s5p x 4 channels) for 40.8W peak, 2 fixed 3U panels (6W per channel), 11.6Ah @ 7.2V nominal Li-ion battery |
Structure | Al. 7075/Al. 6082 chassis with stainless steel load bearing parts; solar panel deployment mechanism |
Thermal control | Multi-Layer Insulation (MLI) |
Payloads | Inter-satellite communication system, GPS & fault tolerant electronics |
Ground segment | Ground station in NTU campus with UHF/VHF high-gain cross-yagi antennas |
![](http://www.eee.ntu.edu.sg/research/SaRC/Research/Projects/velox/PublishingImages/VIIP5.jpg)
2015-077F
1 41171U 15077F 15361.70139708 .00005939 00000-0 33642-3 0 9992
2 41171
14.9928 128.6656 0010895 142.0957 340.3297 15.07685517 1659
To celebrate Singapore’s Golden Jubilee, the VELOX-II CW beacon header has been changed to ssg50 from 30 Dec 2015
![](/images/librariesprovider112/velox-ii-image-gallery/vii1b0a93bfc-114f-4ae4-8d79-7bc24db3077a.jpg?sfvrsn=77a75f8_6)
Internal view of VELOX-II
![](/images/librariesprovider112/velox-ii-image-gallery/vii213b48377-d703-4b8f-9368-8d59deb3c3cb.jpg?sfvrsn=3120ca12_4)
GPS payload
![Flat satellite](/images/librariesprovider112/velox-ii-image-gallery/viip3bb4f4de8-f77e-49bc-a22d-2138ad108fff.jpg?sfvrsn=fb31d423_3)
Flat satellite
![](/images/librariesprovider112/velox-ii-image-gallery/vii4f792b8f3-5088-4808-8072-1b6017b18db3.jpg?sfvrsn=f736e211_4)