Off the Shelf | Sun Sensors
Bradford's Coarse Sun Sensor delivers information about the position of the sun relative to the spacecraft. This gives a attitude knowledge to the OBC at all times, supporting coarse maneuvering of the spacecraft and to inform the spacecraft about the position of the sun when it is in a safe mode of operation. The Coarse Sun Sensor is a rugged, highly reliable, self-redundant device designed to detect sunlight in a hemispherical field of view, meaning only two devices are needed to provide full-sky sun detection.
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| Parameter | Specification | |
|---|---|---|
FOV | 180 x 180 ° | |
Accuracy | ± 2 ° ( 3σ ) at BoL | |
Resolution | < 0.1 ° | |
Noise Equivalent Angle | Negligible | |
Mass | 215 g | |
Dimensions | 110 x 110 x 30 mm | |
Power Consumption | 0 W | |
Reliability Figure | 41 FIT @ 60 °C per channel | |
Total Ionising Dose Resilience | > 100 kRad | |
Single Event Resistance | Insensitive to SEE | |
Data Interface | Analogue currents or voltages | |
Electrical Interface | Dual 9-pin D-sub connector | |
Mechanical Inferface | 4x M4 mounting holes |
By varying the angle of the sensors a more tailored FoV can be achieved to meet mission needs.
5th top-mounted detector provides additional field of view and allows for sun tracking diagonally.
Strapped on to the unit directly to hide stray light sources.
On-unit conversion of output signals to voltages for direct ADC conversion.
3/30/2024
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