Sulfur dioxide in the atmosphere of Venus. 1: Sounding rocket observations

Details Sulfur dioxide in the atmosphere of Venus. 1: Sounding rocket observations Sulfur dioxide in the atmosphere of Venus. 1: Sounding rocket observations

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994icar..112..382m&link_type=abstract

Icarus (ISSN 0019-1035), vol. 112, no. 2, p. 382-388

Computer Science

Sound

11

Irradiance, Radiance, Sounding Rockets, Sulfur Dioxides, Venus Atmosphere, Calibrating, Instrument Errors, Reflectance, Spatial Distribution, Ultraviolet Spectra

Scientific paper

In this paper we present ultraviolet reflectance spectra obtained during two sounding rocket observations of Venus made during September 1988 and March 1991. We describe the sensitivity of the derived reflectance to instrument calibration and show that significant artifacts can appear in the spectrum as a result of using separate instruments to observe both the planetary radiance and the solar irradiance. We show that sulfur dioxide is the primary special absorber in the 190-230 nm region and that the range of altitudes probed by these wavelengths is very sensitive to incidence and emission angles. In a following paper Na et al. (1994) show that sulfur monixide features are also present intese data. Accurate identification and measurement of additional species require observations in which both the planetary radiance and the solar irradiance are measured with the same instrument. The instrument used for these observations is uniquely suited for obtaining large phase angle coverage and for studying transient atmospheric events on Venus because it can observe targets within 18 deg of the Sun while Earth-orbiting instruments are restricted to solar elongation angles greater than or equal to 45 deg.

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