Introducing Fred Calef III

This week we have Fred Calef III hosting astrotweeps. Fred graduated from the University of Alaska Fairbanks (UAF) in Geological Sciences in 2010. His dissertation was on fresh small rayed impact craters on Mars, looking at ejecta retention rates and what they tell us about the current environment and geomorphic evolution of the surface. He postdoc’d at California Institute of Technology (Caltech) via the Jet Propulsion Laboratory (JPL) doing landing site analysis for the Mars Science Laboratory (MSL, aka Curiosity) as well as trained as an Engineering Camera Payload Uplink Lead (ECAM-PUL) for the Mars Exploration Rover (MER) Opportunity. Towards the end of his postdoc, he was hired at JPL as the Geospatial Information Scientist, aka ‘Keeper of the Maps’, and Co-Localization Scientist for MSL. Besides work on MER and MSL, Fred is on the InSight lander science team as ‘Keeper of the Map’ for placement of a seismometer (SEIS) and heatprobe (HP3) as well as doing landing site analysis for InSight and the Mars2020 rover. You can find Fred on twitter at @cirquelar


Introducing Barbara Cohen

Dr. Barbara Cohen leads the planetary science group at the Marshall Space Flight Center. Originally from upstate New York, Dr. Cohen earned her BS in Geology from the State University of New York at Stony Brook and her PhD in Planetary Science from the University of Arizona. She is now a planetary scientist at NASA’s Marshall Space Flight Center interested in geochronology and geochemistry of planetary samples from the Moon, Mars and asteroids.

Dr. Cohen serves within NASA representing science interests and capabilities within human spaceflight planning. She is a Principal Investigator on multiple NASA research projects, a member of the Mars Exploration Rover mission team still operating the Opportunity rover, and the principal investigator for Lunar Flashlight, a lunar cubesat mission that will be launched in 2018 as an SLS secondary payload. She is the PI for the MSFC Noble Gas Research Laboratory (MNGRL) and is developing a flight version of her noble-gas geochronology technique, the Potassium-Argon Laser Experiment (KArLE), for use on future planetary landers and rovers. She has participated in the Antarctic Search for Meteorites (ANSMET) over three seasons, where she helped recovered more than a thousand pristine samples for the US collection, and asteroid 6186 Barbcohen is named for her.