J
J. L. Callas
Publications - 1
Citations - 53
J. L. Callas is an academic researcher. The author has contributed to research in topics: Radioactive decay & Neutron temperature. The author has an hindex of 1, co-authored 1 publications receiving 52 citations.
Papers
More filters
Journal ArticleDOI
Science applications of the Mars Observer gamma ray spectrometer
William V. Boynton,Jacob I. Trombka,W. C. Feldman,J. R. Arnold,P. A. J. Englert,Albert E. Metzger,Robert C. Reedy,S. W. Squyres,Heinrich Wänke,Samuel Bailey,J. Brückner,J. L. Callas,D. M. Drake,P. Duke,L. G. Evans,E. L. Haines,F. C. McCloskey,H. Mills,C. Shinohara,R. D. Starr +19 more
TL;DR: The Mars Observer gamma ray spectrometer was used by the Mars Observer spacecraft as discussed by the authors to measure the elemental composition of Mars, which was used to map the depth dependence of hydrogen in the upper meter.