fumito
August 28, 2025, 6:37am
1
SC-Sat1a is a 3U-sized CubeSat developed by Space Cubics Inc. for the purpose of long-duration orbital demonstration of its spaceborne computer, the SC-OBC Module A1 . It is equipped with two SC-OBC Module A1 units.
Item
Details
Satellite Name
SC-Sat1a
Sister Satellite
SC-Sat1
Mission
In-orbit operation verification of the spaceborne computer SC-OBC Module A1
Form Factor
3U CubeSat (10 x 10 x 34 cm)
Weight
Approx. 3 kg
Inter-component Communication Bus
Controller Area Network (CAN)
Inter-component Communication Protocol
The Cubesat Space Protocol (CSP)
Developing Company
Space Cubics Inc.
Item
Details
Power Control Board
EPS manufactured by NanoAvionics
Battery Type
Lithium-ion
Battery Rated Voltage
7.2V
Battery Capacity
72Wh
Solar Cell Type
GaAs
Solar Cell Area (per side)
180cm2
Max Solar Cell Output (per side)
7W
Item
Details
Transceiver
SRS-3 manufactured by Satlab
Communication Frequency Band
S-band
Max Uplink Data Rate
128 kbps
Uplink Modulation Scheme
GMSK
Max Downlink Data Rate
512 kbps
Downlink Modulation Scheme
GMSK
Power Consumption (Receive Standby)
550 mW
Power Consumption (Transmit/Receive)
5.0 W
Max Transmit Power
1 W
Antenna Type
Circularly Polarized Patch Antenna
Max Antenna Gain (Main Lobe)
Approx. 6.0 dBi
Item
Details
Transceiver
DSTRX-3 manufactured by DST Technology
Communication Frequency Band
S-band
Max Uplink Data Rate
4 kbps
Uplink Modulation Scheme
PCM-PSK-PM
Max Downlink Data Rate
64 kbps
Downlink Modulation Scheme
BPSK
Power Consumption (Receive Standby)
2.0 W
Power Consumption (Transmit/Receive)
5.0 W
Max Transmit Power
66 mW
Antenna Type
Circularly Polarized Patch Antenna
Max Antenna Gain (Main Lobe)
Approx. 4.5 dBi
Item
Details
OBC for CDH
SC-OBC Module A1 + I/O Board
External Interfaces
CAN (Main inter-component bus)
RS485 (Sub transceiver)
PWM (Magnetorquer)
I2C (Temperature sensor, Magnetometer, SUN sensor)
GPIO (DSW, etc.)
Item
Details
OBC for ADCS
SC-OBC Module A1 + ADCS Board
GNSS Receiver
Supported Satellites: GPS, GLONASS, Galileo, BeiDou, QZSS, NavIC, SBAS
GNSS Antenna
Dual patch antenna, Gain: 4.5 dBic
IMU
3-axis accelerometer, 3-axis gyroscope
SUN Sensor
Standard Accuracy (No Correction): ±1° to ±4°
3-axis Magnetometer
Measurement Range: ±8 Gauss, Resolution: 0.25 mG
3-axis Magnetorquer
Dipole Moment: X/Y-axis 0.30 Am2 , Z-axis 0.34 Am2
3-axis Reaction Wheel
-
Item
Details
Manufacturer
Task Inc.
Material
A5052
Surface Treatment (Rail Surface)
Hard Anodizing
Surface Treatment (Other)
Alodine Treatment
None
Item
Details
OBC for Camera Control
Raspberry Pi Zero 2 W
Camera Module
Global Shutter, RGB, 2.3 MP
Contracted with two ground stations:
FM
EM
