fumito
August 28, 2025, 6:37am
1
SC-Sat1a is a 3U-sized CubeSat developed by Space Cubics Inc. for the purpose of long-term orbital demonstration of its space computer, the SC-OBC Module A1 . It is equipped with two SC-OBC Module A1 units.
Item
Content
Satellite Name
SC-Sat1a
Sibling Satellite
SC-Sat1
Mission
In-orbit verification of the space computer SC-OBC Module A1
Dimensions
3U CubeSat (10 x 10 x 34 cm)
Weight
Approx. 3kg
Inter-component Communication Bus
Controller Area Network (CAN)
Inter-component Communication Protocol
The Cubesat Space Protocol (CSP)
Developing Company
Space Cubics Inc.
Item
Content
Power Control Board
EPS manufactured by NanoAvionics
Battery Type
Lithium-ion battery
Battery Rated Voltage
7.2V
Battery Capacity
72Wh
Solar Cell Type
GaAs
Solar Cell Area (per side)
180cm²
Maximum Solar Cell Output (per side)
7W
Item
Content
Transceiver
SRS-3 manufactured by Satlab
Communication Frequency Band
S-band
Maximum Uplink Data Rate
128kbps
Uplink Modulation Scheme
GMSK
Maximum Downlink Data Rate
512kbps
Downlink Modulation Scheme
GMSK
Power Consumption (Receive Standby)
550mW
Power Consumption (Transmit/Receive)
5.0W
Maximum Transmit Output
1W
Antenna Type
Circularly Polarized Patch Antenna
Maximum Antenna Gain (Main Radiation Direction)
Approx. 6.0dBi
Item
Content
Communication Frequency Band
S-band
Maximum Uplink Data Rate
4kbps
Uplink Modulation Scheme
PCM-PSK-PM
Maximum Downlink Data Rate
64kbps
Downlink Modulation Scheme
BPSK
Power Consumption (Receive Standby)
2.0W
Power Consumption (Transmit/Receive)
5.0W
Maximum Transmit Output
66mW
Antenna Type
Circularly Polarized Patch Antenna
Maximum Antenna Gain (Main Radiation Direction)
Approx. 4.5dBi
Item
Content
CDH OBC
SC-OBC Module A1 + I/O Board
External I/O
CAN (Main Component Bus)
RS485 (Sub Transceiver)
PWM (Magnetorquer)
I2C (Temperature Sensor, Magnetometer, SUN Sensor)
GPIO (DSW, etc.)
Item
Content
ADCS OBC
SC-OBC Module A1 + ADCS Board
GNSS Receiver
Supported Satellites: GPS, GLONASS, Galileo, BeiDou, QZSS, NavIC, SBAS
GNSS Antenna
Dual Patch Antenna, Gain: 4.5dBic
IMU
3-axis Accelerometer, 3-axis Gyroscope
SUN Sensor
Standard Accuracy (No Correction): ±1° ~ ±4°
3-axis Magnetometer
Measurement Range: ±8 Gauss, Resolution: 0.25mG
3-axis Magnetorquer
Dipole Moment: X/Y Axis 0.30Am², Z Axis 0.34Am²
3-axis Reaction Wheel
-
Item
Content
Material
AL5052
Surface Treatment (Rail Surface)
Hard Anodizing
Surface Treatment (Other)
Alodine Treatment
None
Item
Content
Camera Control OBC
Raspberry Pi Zero 2 W
Camera Module
Global Shutter, RGB, 2.3MP
Contracted with two ground stations:
FM
EM
