Fine Sun Sensor

The FSS-15 sun sensor is a satellite attitude determination system based on an advanced photodiode quadrant detector shielded by an aperture mask. This design ensures sun incidence measurements up to 0.1-degree accuracy. Equipped with an embedded error correction table—derived from thorough in-house calibration—the FSS-15 delivers top class performance while remaining affordable for all budgets. Consuming 5.5 mA at 16 Hz and compliant with GEVS and ECSS testing standards, the FSS-15 combines reliability and efficiency. Additionally, its compact design ensures easy integration into satellite systems, making it an indispensable asset for a wide range of satellite applications.


High accuracy 2-axis digital sun sensor

Low power consumption design

Small form factor

I2C Bus stuck protection

Environmental test follows NASA GEVS

Albedo mitigation for FSS-30 Series

The FSS-15D and FSS-15M are two variations of fine sun sensors designed for satellite applications. The FSS-15D offers a higher sampling rate compared to the FSS-15, making it well-suited for high-dynamic situations such as rockets or high-altitude vehicles with rapid slew rate requirements. On the other hand, the FSS-15M maintains the same performance as the FSS-15 but incorporates a triaxial magnetometer. Since the fine sun sensor will be positioned away from the ADCS, integrating the magnetometer with the fine sun sensor helps minimize the influence of leakage magnetic flux density from the ADCS. By reducing magnetic interference, the FSS-15M enhances the accuracy and reliability of the fine sun sensor's measurements.




Coarse Sun Sensor

CSS-10 is a coarse sun sensor with a simple and robust design. This sun sensor is suitable for spacecrafts with low pointing requirement or need a robust input for sun-acquisition algorithm. Multiple sun sensors are recommended to be installed on different faces of the satellite to maximize the field of view of the sun sensor array.

1-axis analog coarse sun sensor

< 5 deg (1-sigma) of sun determination accuracy calibration instructions

Hardware protection to prevent short circuit system failures

Six coarse sun sensors can provide a full sky (4π) FOV coverage (± 60 deg for each sensor)

Requires analog to digital converter.

Three pins including Vcc, GND, and output lines.

Field of View (FOV)

± 60 deg

Power Consumption

< 0.1 mA


15.00 x 7.00 x 6.00 mm (< 0.5 g)

Radiation Tolerance

> 10 Krad




ADCS-10m is an integrated ADCS with a variable speed control moment gyroscope (CMG) which is suitable for satellites up to roughly 3U. This module can be installed within the tuna can or the satellite structure.

  • ADCS-10m
  • ADCS-20m
  • ADCS-40m
  • CMG-10m
  • CMG-20m
  • CMG-40m
  • ADCS Testbed