Application Of Millimeter-Wave Remote Sensing To The Investigation Of Comets

Robert W. Hobbs; John C. Brandt; Stephen P. Maran; John S. Chitwood; Rudolph K. Larsen; Charles Katz; Stanley Becker; Ronald M. Rudish; Ross K. Hendricks; Paul Swanson

doi:10.1117/12.959657

27 February 1981 Application Of Millimeter-Wave Remote Sensing To The Investigation Of Comets

Robert W. Hobbs, John C. Brandt, Stephen P. Maran, John S. Chitwood, Rudolph K. Larsen, Charles Katz, Stanley Becker, Ronald M. Rudish, Ross K. Hendricks, Paul Swanson

Author Affiliations +

Proceedings Volume 0259, Millimeter Optics; (1981) https://doi.org/10.1117/12.959657
Event: 1980 Huntsville Technical Symposium, 1980, Huntsville, United States

Abstract

Despite years of investigation, the solid, quasi-permanent component of comets, the nucleus, remains largely a mystery. Its composition and thermal properties determine the evolution of the more familiar and often spectacular cometary features, the coma and the tail. Under some circumstances, the (≈200 K) nucleus may be obscured by a dust cloud of much higher temperature. It appears that the most appropriate technology for the investigation of the surface and subsurface layers of the nucleus is millimeter-wave sensing from an interplanetary spacecraft. Simple radiative transfer models, adapted from methods used for the interpretation of remote-sensing data on terrestrial ice and snow fields, are used to predict the millimeter-wave spectra of representative model nuclei. The spectra guide the choice of the minimum set of observing frequencies that is required. An instrument configuration driven by these requirements and guided by available technology and the constraints of a proposed NASA spacecraft, is then derived.

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Robert W. Hobbs, John C. Brandt, Stephen P. Maran, John S. Chitwood, Rudolph K. Larsen, Charles Katz, Stanley Becker, Ronald M. Rudish, Ross K. Hendricks, and Paul Swanson "Application Of Millimeter-Wave Remote Sensing To The Investigation Of Comets", Proc. SPIE 0259, Millimeter Optics, (27 February 1981); https://doi.org/10.1117/12.959657

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KEYWORDS

Comets

Space operations

Radiometry

Monochromatic aberrations

Molecules

Radar

Antennas

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