Editing Geoffrey A. Landis (section)

===Mars===
Landis has worked on a number of projects related to developing technology of human and robotic exploration of Mars and scientific analysis of the Martian surface,<ref>Link to [https://scholar.google.com/scholar?as_q=Mars&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=Landis&as_publication=&as_ylo=&as_yhi=&btnG=&hl=en&as_sdt=0%2C21 Google scholar references]</ref> including studies of the performance of [[photovoltaic cells]] in the Mars environment,<ref>{{Cite book|doi=10.1109/PVSC.1990.111816|chapter=Design considerations for Mars photovoltaic systems|title=IEEE Conference on Photovoltaic Specialists|pages=1263–1270|year=1990|last1=Landis|first1=G.A.|author2-link=Joseph Appelbaum|last2=Appelbaum|first2=J.|s2cid=119737588}}</ref><ref>{{Cite journal |doi = 10.2514/3.23877|title = Solar radiation on Mars - Stationary photovoltaic array|journal = Journal of Propulsion and Power|volume = 11|issue = 3|pages = 554–561|year = 1995|last1 = Appelbaum|first1 = J.|last2 = Sherman|first2 = I.|last3 = Landis|first3 = G. A.|hdl = 2060/19940010257|hdl-access = free}}</ref><ref>Geoffrey A. Landis, Thomas W. Kerslake, Phillip P. Jenkins and David A. Scheiman, [https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20040191326.pdf Mars Solar Power], NASA/TM—2004-213367, November 2004; paper AIAA–2004–5555</ref> the effect of Martian dust on performance,<ref>{{cite journal | last1 = Landis | first1 = Geoffrey A. | last2 = Jenkins | first2 = Phillip P. | year = 2000 | title = Measurement of the settling rate of atmospheric dust on Mars by the MAE instrument on Mars Pathfinder | doi = 10.1029/1999JE001029 | journal = J. Geophys. Res. | volume = 105 | issue = E1| pages = 1855–1857 | bibcode=2000JGR...105.1855L| doi-access = free }}</ref> and technologies for dust removal from the arrays.<ref>{{cite journal | last1 = Landis | first1 = Geoffrey A. | year = 1998 | title = Mars Dust-Removal Technology | doi = 10.2514/2.5258 | journal = Journal of Propulsion and Power | volume = 14 | issue = 1| pages = 126–128 }}</ref>
He was a member of the Rover team on the [[Mars Pathfinder]] mission,<ref>JPL, [http://mars.jpl.nasa.gov/MPF/bios/#landis Meet The Mars Pathfinder Scientists], Mars Pathfinder Home Page (1997)</ref><ref>{{cite journal |first=Geoffrey A. |last=Landis |title= Adventures in the Mars Business |journal= Analog Science Fiction and Fact|publisher=[[Dell Magazines]]|date=July–August 1998 |url=http://www.analogsf.com}}</ref> and named the Mars rock, "[[Yogi rock|Yogi]]".<ref>{{cite web |url=http://www.geoffreylandis.com/marsmail.htp |title=e-mail from Mars |date=July 1997 |access-date=December 27, 2010}}</ref> He is a member of the science team on the 2003 [[Mars Exploration Rover]]s mission,<ref name="Goddard"/> where his work includes observations of Martian dust devils,<ref>G. A. Landis, ''et al''., [http://www.lpi.usra.edu/meetings/7thmars2007/pdf/3149.pdf "Dust Devils in Gusev Crater: A Second Year of Observations by the Spirit Rover"], 7th International Conference on Mars, Pasadena, CA, LPI Contributions 1353 (2007): 3149. [http://adsabs.harvard.edu/abs/2007LPICo1353.3149L abstract].</ref> atmospheric science measurements, and observation of frost on the equator of Mars.<ref>G. A. Landis and the MER Athena Science Team, [http://www.lpi.usra.edu/meetings/lpsc2007/pdf/2423.pdf observation of frost on the equator of Mars by the Opportunity Rover], Lunar and Planetary Science XXXVIII (2007) abstract 2423.</ref> He was also a member of the Mars ISPP Propellant Precursor experiment team for the [[Mars Surveyor 2001 Lander]] mission, an experiment package to demonstrate manufacture of oxygen from the Martian atmosphere (which was cancelled after the failure of the [[Mars Polar Lander]]).<ref>D. I. Kaplan, et al., [https://ntrs.nasa.gov/search.jsp?R=20000012715 The Mars In-Situ-Propellant-Production Precursor (MIP) Flight Demonstration], Workshop on Mars 2001: Integrated Science in Preparation for Sample Return and Human Exploration; 54-56; NASA Johnson Space Center; Houston, TX  (1999)</ref>

He has also done work on analyzing concepts for future [[Exploration of Mars|robotic]] and [[human mission to Mars]]. These include the [[Mars Geyser Hopper]] spacecraft, a [[Discovery Program|Discovery-class]] mission concept that would investigate the springtime [[carbon dioxide]] [[Martian geyser]]s found in regions around the [[Planum Australe|south pole of Mars]],<ref name="Geyser Hopper">{{cite conference |author=Geoffrey A. Landis |author2=Steven J. Oleson |author3=Melissa McGuire |title=Design Study for a Mars Geyser Hopper |conference=50th AIAA Aerospace Sciences Conference |publisher=Glenn Research Center, NASA |date=January 9, 2012 |id=AIAA-2012-0631 |url=https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20120004036_2012004260.pdf |access-date=July 1, 2012}}; available from NTRS as {{cite journal |url=https://ntrs.nasa.gov/search.jsp?R=20120004036 |title=Design Study for a Mars Geyser Hopper |access-date=July 1, 2012 |date=January 9, 2012 |website=NASA}}</ref> the Human Exploration using Real-time Robotic
Operations ("HERRO") concept for [[telerobotics|telerobotic]] Mars exploration,<ref>G.A. Landis, "Teleoperation from Mars Orbit: A Proposal for Human Exploration", ''Acta Astronautica'', Vol. 61, No. 1, pp 59-65; presented as paper IAC-04-IAA.3.7.2.05, 55th International Astronautical Federation Congress, Vancouver BC, October 4–8, 2004.</ref><ref>Steven R. Oleson, Geoffrey A. Landis, Melissa L. McGuire, and George R. Schmidt, [https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20130011281.pdf HERRO Mission to Mars Using Telerobotic Surface Exploration From Orbit], NASA/TM—2013-217414; paper AIAA–2011–0334, AIAA Space 2011 Conference & Exposition, {{doi|10.2514/6.2011-7343}}</ref> and concepts for use of [[In-situ resource utilization]] for a [[Mars sample-return mission]].<ref>Geoffrey A. Landis, P. Cunio, T. Ishimatsu, J. Keller, Z. Khan, and R. Odegard, [http://www.lpi.usra.edu/meetings/7thmars2007/pdf/3369.pdf "Mars Sample Return with ISRU"], Seventh International Conference on Mars (2007).</ref> In a 1993 paper, he suggested the use of a phased program of Mars exploration, with a series of incremental achievements leading up to human landings on Mars.<ref>David S. F. Porttree, [https://www.wired.com/2014/03/footsteps-mars-1993/ "Footsteps to Mars (1993)"], ''Wired'', March 1, 2014.</ref>