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Table 1 Characteristics of two generations of star sensors [10, 13]

From: Optical system design of star sensor and stray light analysis

  1st generation 2nd generation
Field of View Wide not very wide
Power > 20 W < 5 W
Weight > 20 kg < 4 kg
Accuracy 20 arc sec 1 arcsec
Minimum Stars Needed to Track 1 star Minimum 3 stars