Solar MEMS Technologies S.L.
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Solar MEMS - Model ACSS -Advanced Coarse Sun Sensors
Advanced Coarse Sun Sensor (ACSS) is a device for sun-tracking and attitude determination. This sensor measures the incident angle of sun ray in two orthogonal axes, providing a high sensitivity based on the geometrical dimensions of the design. ACSS sun sensor offers the highest reliability and radiation hardness for the most demanding LEO and GEO missions. ACSS technology has flight heritage since 2019 with hundreds of flight units delivered, and its manufacturing process has been developed and industrialized for mass production requested for satellite constellations.
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- Sensor: Redundant Sun Sensor
- Field of view: ± 60º
- Accuracy: < 1º (3sigma, calibration)
- Electrical interface: Analog, 15 pin micro connector
- Power supply: 15-30Vm (3 mA)
- Operating temperature: -40º to 85 º Celsius
- Mech specs: 65 x 47 x 13 mm, 40 g
- Housing: Aluminum 6082, alodine + black
- Lifetime: > 10 years
- Qualification Temperature: -55 to 105º Celsius
- Radiation tests:
- 200 kRad (gamma)
- 8e11 10 MeV (protons)
- Mechanical tests:
- Shock 2000 g
- 18.3 g @ 20-2000 H
- Endurance tests:
- 600 cycles from -55 to 105ºC
- 2000h at 125ºC
- EMC/ESD:
- ECSS-E-ST-20-07C
- MIL-STD-461F
ACSS is based on the CSS sensor designed and developed for OneWeb Constellation.
- Mass production: Up to more than 100 ss/month
- Quality control: > 50 inspection points/KC
- Acceptance control: Each ACSS is characterized and tested
