Microstructure and particulate properties of the surfaces of Io and Ganymede - Comparison with other solar system bodiesThe phase curves of Io and Ganymede between 0 and 40 deg solar phase angle have been compiled from Voyager photopolarimeter and ground-based observations. Modeling the data with the Lumme-Bowell theory made it possible to determine improved estimates of the surface texture and particulate properties. Accurate V-band zero-phase geometric albedos, phase integrals, and Bond albedos are also obtained. The properties of the particles on Io's surface appear to be different from those of other solar system objects whose surfaces are totally controlled by impact cratering processes. Sulfur and SO2 frost, previously identified by spectral analysis, seem to exist in a physical form not commonly found on earth. The agglomeration of volcanic ash into aggregates on Io's surface is postulated.
Document ID
19820048247
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Pang, K. D. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Lumme, K. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bowell, E. (Lowell Observatory Flagstaff, AZ, United States)