  We present here a low-cost Raspberry Pi (RPi)-based star sensor
StarberrySense using commercial-off-the-shelf (COTS) components, developed and
built for applications in small satellites and CubeSat-based missions. A star
sensor is one of the essential instruments onboard a satellite for attitude
determination. However, most commercially available star sensors are expensive
and bulky to be used in small satellite missions. StarberrySense is a
configurable system -- it can operate as an imaging camera, a centroiding
camera, or as a star sensor. We describe the algorithms implemented in the
sensor, its assembly and calibration. This payload was selected by a recent
Announcement of Opportunity call for payloads to fly on the PS4-Orbital
Platform by the Indian Space Research Organization (ISRO).
