Annual Meeting
Raymond E. Arvidson, Earth and Planetary Remote Sensing Laboratory, Washington University

Date: Thursday, May 11, 2017
Time Details: 5:30PM Member Business Meeting
6:00PM Cocktail Hour
6:45PM Dinner
7:30PM Program
Location: Location included on invitations mailed to members and friends


Raymond Arvidson

Raymond E. Arvidson has been involved in development and implementation of both orbital and landed missions to the planets, including participation in the Magellan Radar Orbiter Mission to Venus, Team Leader for the Viking Lander Imaging System on Mars, Member of the Project Science Group for the Mars Global Surveyor Mission, Deputy Principal Investigator for the Mars Exploration Rover Missions (Spirit and Opportunity), the Robotic Arm Investigator for the Mars Phoenix Lander Mission, Co-Investigator for the hyper-spectral mappers OMEGA (Mars Express orbiter) and CRISM (Mars Reconnaissance Orbiter), and a Science Team Member for the Mars Science Laboratory Curiosity Rover. He is also the Director of the NASA Planetary Data System Geosciences Node, making available ~300 terabytes of NASA data to the worldwide research community.

The Opportunity rover landed on the Meridiani plains of Mars in 2004 and has been exploring the rim of the ancient Endeavour Crater for the past several years. The Curiosity rover landed on the plains in Gale Crater in 2012 and is currently on the lower slopes of the ~5 km stack of Mount Sharp strata located in the crater’s center. Opportunity measurements show that the plains are underlain by sulfate-rich sandstones that originally formed in shallow acidic lakes, followed by reworking by wind and water to form the layered deposits found today. The rim of Endeavour, based on Opportunity’s measurements, has been subjected to repeated events in which ground water has corroded the crust, forming clays and sulfate minerals (e.g. epsomite), particularly along fractures. Curiosity measurements show that rocks underlying the lower portion of Mount Sharp formed in an ancient river and lake system, consistent with a long-lived lake that filled Gale Crater. Results for the two rover missions unequivocally show that the surface and interior of Mars were once warmer and wetter, and likely provided habitable zones for life.

Reservation Deadline: May 8, 2017
Payment Information: Pre-payment is required for dinner; payments will no longer be accepted at the door.

Mail your check (payable to The Explorers Club - St. Louis Chapter) – with your name and the names of your guests – to:
   The Explorers Club - St. Louis Chapter
   c/o Mr. Benjamin Hulsey
   Thompson Coburn LLP
   One US Bank Plaza
   St. Louis, MO 63101-9702
Member/Spouse Price: $70
Guest Price: $75

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