Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p13a1651o&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #P13A-1651
Physics
[5405] Planetary Sciences: Solid Surface Planets / Atmospheres, [5445] Planetary Sciences: Solid Surface Planets / Meteorology, [5464] Planetary Sciences: Solid Surface Planets / Remote Sensing
Scientific paper
The brightness of the Venus dayside has been measured from onboard cameras of the "Akatsuki" spacecraft which has launched by the Japan Aerospace Exploration Agency in 2010. Simultaneous observations using five wavelengths from UV to Mid-IR with four cameras were conducted at a distance of over 10 million kilometers from Venus in March 2011. The observed Venus diameter is only about the size of 4 pixels at a maximum. The phase curve of Venus at 0.90 μm covering phase angle from 1° to 56° has been obtained by the observations using 1 μm camera (IR1) onboard Akatsuki. Temporal variation of the brightness of the Venus dayside at 0.90 μm is examined by comparison between our data and a phase function observed from ground with the broadband I (near infrared) filters [Mallama et al., 2006]. In this presentation, association between the brightness changes and total amount of the Venus clouds is discussed.
Imamura Takashi
Iwagami Naomoto
Ohtsuki Shoko
Yamada Mitsuru
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