Does anyone know what the reference points are for the rotation manoeuvres? The text does not provide any information on how the probe knows that it is off. It needs some kind of reference, no?
- "In flight, the device found and locked on to the star Canopus, providing a reference for guidance and navigation."
https://airandspace.si.edu/collection-objects/star-tracker-a... ("Star Tracker and Hood Assembly Support Equipment, Voyager Spacecraft")
https://airandspace.si.edu/collection-objects/sun-sensor-and... ("Sun Sensor and Hood Assembly Support Equipment, Voyager Spacecraft")
edit: In more detail,
https://space.stackexchange.com/questions/43803/how-did-the-...