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Browsing LPI Contributions by Author "Virkki, Anne K."

Browsing LPI Contributions by Author "Virkki, Anne K."

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  • Arecibo S-band radar characterization of local-scale heterogeneities within Mercury's north polar deposits 
    Rivera-Valentín, Edgard G.; Meyer, Heather M.; Taylor, Patrick A.; Mazarico, Erwan; Bhiravarasu, Sriram S.; Virkki, Anne K.; Nolan, Michael C.; Chabot, Nancy L.; Giorgini, Jon D.; https://orcid.org/0000-0002-4042-003X; https://orcid.org/0000-0002-2493-943X (IOP Publishing, 2022-03-14)
    Ground-based planetary radar observations first revealed deposits of potentially nearly pure water ice in some permanently shadowed regions (PSRs) on Mercury's poles. Later, the MESSENGER spacecraft confirmed the icy nature ...
  • Asteroids Inside Out: Radar Tomography 
    Haynes, Mark; Virkki, Anne K.; Venditti, Flaviane C. F.; Hickson, Dylan; Pinilla-Alonso, Noemí; Brisset, Julie; Benner, Lance A. M.; Raymond, Carol A.; Lazio, Joseph; Freeman, Anthony; Castillo-Rogez, Julie; Asphaug, Erik Ian; Taylor, Patrick A.; Herique, Alain; Kofman, Wlodek; Sava, Paul; Pajola, Maurizio; Lucchetti, Alice; De Pra, Mario Nascimento; Rivera-Valentín, Edgard G.; https://orcid.org/0000-0002-2493-943X; https://orcid.org/0000-0002-4042-003X (2020)
    This white paper summarizes the science opportunities, state of the art, and outstanding knowledge gaps, with a particular emphasis on the 99942 Apophis encounter when it flies by within six Earth radii (near the outer ...
  • The Importance of Ground-Based Radar Observations for Planetary Exploration 
    Rivera-Valentín, Edgard G.; Taylor, Patrick A.; Sanchez-Vahamonde, Carolina Rodriguez; Hickson, Dylan; Neish, Catherine; Brozović, Marina; Whitten, Jennifer; Meyer, Heather M.; Busch, Michael W.; Campbell, Bruce A.; Campbell, Donald B.; Margot, Jean-Luc; Virkki, Anne K.; Venditti, Flaviane C. F.; Nolan, Michael C.; Howell, Ellen S.; Womack, Maria; Pinilla-Alonso, Noemí; https://orcid.org/0000-0002-4042-003X; https://orcid.org/0000-0002-2493-943X; https://orcid.org/0000-0002-6888-9868 (2020)
    A white paper submitted to the Planetary Science and Astrobiology Decadal Survey 2023-2032. Here, we discuss several community-identified priority science questions that ground-based radar studies are particularly suited ...
  • Near-Earth Object Characterization Using Ground-Based Radar Systems 
    Virkki, Anne K.; Taylor, Patrick A.; Busch, Michael W.; Howell, Ellen S.; Rivera-Valentín, Edgard G.; Fernandez, Yanga; Benner, Lance A. M.; Brozović, Marina; Becker, Tracy M.; Marshall, Sean E.; Hickson, Dylan; Masiero, Joseph; Springmann, Alessondra; Paganelli, Flora; Venditti, Flaviane C. F.; Busch, Michael W.; Zambrano Marín, Luisa F.; Lopez Oquendo, Andy; Womack, Maria; Brucker, Melissa J.; Campbell, Bruce A.; Nolan, Michael C.; https://orcid.org/0000-0002-2493-943X; https://orcid.org/0000-0002-4042-003X (2020)
    In the next decade, in addition to continuing as a state-of-the-art astrometric tool for planetary defense, we expect ground-based radar observations to expand our knowledge of the physical characteristics of the near-Earth ...
  • Planetary Radar Astronomy with Ground-Based Astrophysical Assets 
    Taylor, Patrick A.; https://orcid.org/0000-0002-2493-943X; Rivera-Valentín, Edgard G.; https://orcid.org/0000-0002-4042-003X; Bonsall, Amber; Becker, Tracy M.; Benner, Lance A. M.; Bhiravarasu, Sriram S.; https://orcid.org/0000-0003-0019-6261; Brozović, Marina; Busch, Michael W.; Campbell, Bruce A.; Ghigo, Frank D.; Harris, Alan W.; Magri, Christopher; Mainzer, Amy K.; Margot, Jean-Luc; Marshall, Sean E.; Masiero, Joseph; Naidu, Shantanu P.; Nolan, Michael C.; Patterson, Gerald W.; Prockter, Louise; Sizemore, Hanna G.; Swindle, Timothy D.; Venditti, Flaviane C. F.; Virkki, Anne K.; https://orcid.org/0000-0002-3927-1073 (2020)
    Satisfying federal mandates requires continued and expanded support of planetary radar programs, upgrades to the facilities that host the planetary radar systems, and adequate communication between Congress and all relevant ...

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