Fine (Digital) Sun Sensor
The front surface of the sensor is a synthetic sapphire window with a reflective metal coating beneath. Slits are etched in the metal and sunlight passes through them and through an optical filter onto a sensor. The charge on the photo-sensors are read by the microcontroller which processes the image and computes the sun vector. The vector and other telemetry is returned to the spacecraft through the serial interface.
The NewSpace Fine Sun Sensor accecpts configuration commands and outputs digital angles and telemetry over a serial interface on the on-board computer. The unit can be powered from unregulated DC power from the spacecraft.
Accurate determination of sun-angle
Four sensors can achieve full sky coverage
Can be used as safe-mode sensors on gyro or star-mapper controlled systems
Used in conjunction with a magnetometer for simple attitude control
Mass: 35 grams
Power: 7.5 mA average, 26 mA peak
Size: 34 mm x 32 mm x 21 mm
Operating temperature: -25°C to + 50°C
15g rns random, 1000g shock (qualification levels)
10krad total dose (component level)
Power Supply: 28V DC nominal ( 5V to 50V)