NASA's Surface Biology and Geology Concept Study: Status and Next Steps. - David R. Thompson 001; David S. Schimel; Benjamin Poulter 001; Ian Brosnan; Simon J. Hook; Robert O. Green; Nancy F. Glenn; Liane S. Guild; Christopher Henn; Kerry Cawse-Nicholson; Raymond F. Kokaly; Christine M. Lee; et al. (IGARSS, 2020)