Wilbert Smith Archives Files Box 1130 16 1130-16-p052

Document Text (OCR)

160 SMITHSONIAN CONTRIBUTIONS TO ASTROPHYSICS source of uncertainty: the flutter that affected the rotation of the camera shutters. When the trail covered two or more cycles of the flutter, it was possible to eliminate its effect fairly well, but for shorter trails a correction was impossible (Whipple and Jacchia, 1957). Moreover, the elongated and fuzzy form of the dashes, partic- ularly when wake or blending or both together are present, makes it impossible to know ex- actly to what the...