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Active Regions on the Farside of the Sun as Seen from Mars: 3D Visualization with Marie DataFrom March 2002, the MARIE (Martian Radiation Environment Experiment) instrument of NASA-JSC onboard the 2001 Mars Odyssey spacecraft has been providing radiation data from the Martian orbit. During the past two years, the orbit alignment of Mars-Sun-Earth provided a wealth of opportunity between 180 degrees (August 2002) and 0 degrees (October 2003). During this time, the MARIE data included the background GCR (Galactic Cosmic Rays) and several SPE (Solar Particle Events) enhanced radiation dose-rate measurements at Mars. The MARIE instrument provided a unique data set of radiation dose-rate at Mars from the active regions on the solar disk facing the Mars side. The SPE observations of October 2002 at Mars by the MARIE instrument are unique and there were no indications of these events towards the Earth at that time. Nearly 40 times increase in the quiet-time GCR dose-rate was noted from about 25 mradday to nearly 1000 mradday at Mars. Radiation dose-rate enhancement was not observed toward the Earth or in the Low Earth Orbit (LEO) during this time. Understanding the active regions on the Sun that are likely to result into SPE on the far side will also be of concern for future deep space explorations beyond LEO. We present the observations of these SPE enhanced dose rates due to the active regions from the far side of the Sun with the 3D visualization of solar disks facing Mars and Earth.
Document ID
20050217409
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Saganti, P. B.
(NASA Johnson Space Center Houston, TX, United States)
Cueinotra, F. A.
(NASA Johnson Space Center Houston, TX, United States)
Cleghorn, T. F.
(NASA Johnson Space Center Houston, TX, United States)
Zeitlin, C. J.
(California Univ., Lawrence Berkeley National Lab. Berkeley, CA, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2004
Subject Category
Solar Physics
Meeting Information
Meeting: 35th CSOPAR Scientific Assembly
Location: Paris
Country: France
Start Date: July 18, 2004
End Date: July 25, 2004
Distribution Limits
Public
Copyright
Other

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