Abstract

Direct measurement of discernible features in the Hubble Space Telescope (HST) imagery has enabled a self-consistent determination to be made of the effective conic constant of HST images taken with planetary camera 6 (PC-6) of the wide field and planetary camera. Before being corrected for the contribution from PC-6, the conic constant is −1.01429 ± 0.0002. The correction for PC-6 is less accurately determined but probably lies between −0.0002 and 0.0004. As a result the HST optics are characterized best by a conic constant of −1.0140 ± 0.0003 as obtained from direct image measurements.

© 1993 Optical Society of America

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