Physics
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992hst..prop.3899s&link_type=abstract
HST Proposal ID #3899
Physics
Hst Proposal Id #3899
Scientific paper
I propose to obtain a series of high signal-to-noise Titan images spanning the available filter set from violet to the NIR in order to study the mysterious north-south albedo contrast discovered in 1979. It is important to obtain a wide wavelength coverage for several reasons. The haze optical depth decreases rapidly longward of 5000A such that redder light penetrates to deeper and deeper levels within the atmosphere. Hopefully, it will be possible to probe to the surface by 1 micron. Previous observations have shown conclusively that the contrast decreases between 5500A and 6500A. It is also possible that the contrast reverses polarity at some wavelengths, particularly in the strong methane band at 8890A. There has never been a simultaneous set of images taken which compares the violet to the red and NIR as well as the methane band. This data set will be analyzed and the effects of the PSF will be removed for comparison with microphysical models of a haze which is modulated with different incident forcing functions: seasonal and solar cycle periodicities are of foremost importance. Variations of the contrast with altitude and time will be the basis for understanding the complex interaction of Titan's stratospheric hazes with the solar flux.
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