Science Seminars

Re-analysis of up to fifteen years of Pioneer Venus UVS data

Speaker: Kevin McGouldrick
Date: Thursday, Feb 16, 2012
Time: 4:00 PM to 5:00 PM
Location: LSTB-299, Auditorium

Seminar Abstract:

The Laboratory for Atmospheric and Space Physics is carrying on a project to restore and preserve data products from several past missions for archival and use by the scientific community via PDS. This project includes the restoration of data from Mariner 6/7, Pioneer Venus, Voyager 1/2, and Galileo. Here, we present initial results of re-analysis of Pioneer Venus Orbiter Ultraviolet Spectrometer (PVOUVS) data. Using the Discrete Ordinate Radiative Transfer Model (DISORT), we generate a suite of models of I/F as a function of viewing geometry (incidence angle, emission angle, and azimuth angle between those two rays) and vertical distribution of sulfur dioxide (mixing ratio at 40mb and scale height). We calculate best fits to our models for multi-spectral images taken with PVOUVS. We pay special attention to data that include wavelengths longer than 280nm, which were not generally consdiered in the previous work by Esposito et al. (1988), and which provide the opportunity for comparison with current observations using the Visible channel of the mapping mode of the imaging spectrometer (VIRTIS-M-Vis) on Venus Express.