SP-436 Project Orion: A Design Study of a System for Detecting Extrasolar Planets

Figure 8. Accuracy (o) of a ground-based astrometric observation using the Allegheny Observatory Thaw telescope shown for various integration fumes (t). Data show that the photographic plate introduces significant errors for long integration times (lower curve indicates errors due only to Earth's atmosphere).

Figure 8. Accuracy (o) of a ground-based astrometric observation using the Allegheny Observatory Thaw telescope shown for various integration fumes (t). Data show that the photographic plate introduces significant errors for long integration times (lower curve indicates errors due only to Earth's atmosphere).

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