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Observations in the Asteroid Belt with the Imaging Photopolarimeter of Pioneers F and G

Published online by Cambridge University Press:  12 April 2016

C.E. Kenknight
C.E. Kenknight*
Affiliation:
University of Arizona

Extract

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Astronomical measurements of the brightness, color, and polarization of light from solar system bodies at phases not visible from Earth are planned for Pioneers F and G. An imaging photopolarimeter (IPP) in the scientific payloads will make these measurements and produce line-scan color images of Jupiter. The IPP collects light with a 2.5 cm aperture telescope that is able to turn in the plane containing the spin axis. Data are taken in scans around the spin axis along a cone whose apex angle is periodically changed by stepping the telescope. The light is analyzed for polarization, divided into blue and red components, and detected by four photomultipliers having electron channel multipliers. Appendix A gives a summary of instrument characteristics.

Type
Part III-Possible Space Missions and Future Work
Information
International Astronomical Union Colloquium , Volume 12: Physical Studies of Minor Planets , 1971 , pp. 633 - 637
Copyright
Copyright © NASA 1971

References

Gehrels, T., Suomi, V.E., and Krauss, R.J. 1972, On the Capabilities of the Spin-Scan Imaging Technique. Space Research 12 (ed., Strickland, A.C.). Akad. Verlag. Berlin.Google Scholar
Harris, D. 1961, Photometry and Colorimetry of Planets and Satellites. Planets and Satellites (eds., Kuiper, G. and Middlehurst, B.), pp. 272–342. Univ. of Chicago Press. Chicago.Google Scholar
NASA Ames Research Center. 1970, Pioneer F Asteroid Analysis. Pioneer Program Document PT-204.Google Scholar