NOTE: Preliminary Measurements of the Cryogenic Dielectric Properties of Water-Ammonia Ices: Implications for Radar Observations of Icy Satellites

Details NOTE: Preliminary Measurements of the Cryogenic Dielectric Properties of Water-Ammonia Ices: Implications for Radar Observations of Icy Satellites NOTE: Preliminary Measurements of the Cryogenic Dielectric Properties of Water-Ammonia Ices: Implications for Radar Observations of Icy Satellites

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998icar..136..344l&link_type=abstract

Icarus, Volume 136, Issue 2, pp. 344-348.

Computer Science

15

Scientific paper

I report preliminary measurements of the complex permittivity of frozen aqueous ammonia solutions at liquid nitrogen temperatures, representative of those in the saturnian system. The real part of the dielectric constant of 30% ammonia ice is around 4.5 at near-DC frequencies and at ~1 MHz, compared with around 3.1 for pure water ice. The loss tangents of ammonia-rich ices seem somewhat (~50%) higher than those for water ice, for which the few low-temperature experiments to date indicate values comparable with predictions by Thompson and Squyres (1990, Icarus 86, 336-354) and Maetzler (1998, in Solar System Ices (B. Schmitt, C. DeBergh, and M. Festou, Eds.), pp. 241-257, Kluwer Academic, Dordrecht), but considerably higher than models by Chyba et al. (1998, Icarus, in press). Ammonia-rich ice may reconcile the radar and optical appearance of Titan's surface: the detectability of water-ammonia ice on Titan by the Cassini mission and the implications for Titan's origin and evolution are discussed.

Affiliated with

Also associated with

No associations

Rating

NOTE: Preliminary Measurements of the Cryogenic Dielectric Properties of Water-Ammonia Ices: Implications for Radar Observations of Icy Satellites does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with NOTE: Preliminary Measurements of the Cryogenic Dielectric Properties of Water-Ammonia Ices: Implications for Radar Observations of Icy Satellites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and NOTE: Preliminary Measurements of the Cryogenic Dielectric Properties of Water-Ammonia Ices: Implications for Radar Observations of Icy Satellites will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1293469