Revising the Basal Permittivity of the South Polar Layered Deposits of Mars With a Surficial Dust Cover DOI Creative Commons
C. Grima, W. Kofman, Alain Hérique

и другие.

Geophysical Research Letters, Год журнала: 2024, Номер 51(12)

Опубликована: Июнь 22, 2024

Abstract Bright basal reflections from the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) have been proposed to be consistent with permittivities characteristic of a wet material beneath south polar layered deposits (SPLD). The characterization recently formed impact crater highlight existence several meters thick ice‐poor layer associated unit blanketing large portion SPLD. We revise radar propagation model used invert permittivity by including surficial thin layer. find that inverted is highly sensitive properties such layer, solutions ranging common dry rocks an unambiguously base. advocate toward better cover assess or nature base, possibly reconcile most literature on topic.

Язык: Английский

MRO overview: Sixteen years in Mars orbit DOI Creative Commons
Richard W. Zurek, L. K. Tamppari,

M. Dan Johnston

и другие.

Icarus, Год журнала: 2024, Номер 419, С. 116102 - 116102

Опубликована: Май 22, 2024

Launched on August 12, 2005, the Mars Reconnaissance Orbiter (MRO) entered orbit March 10, 2006. Following a period of aerobraking, MRO completed its entry into primary science in September 2006, initiating program systematic observations that still continues. Five providers, including Italian Space Agency, provided 6 instruments for flight, observing surface, atmosphere, and subsurface with greater spatial resolution coverage than ever before. Two investigations utilized spacecraft accelerometers tracking orbiter via Deep Network to study upper atmosphere densities gravity field planet. The data acquired by have revealed dynamic planet whose change from an ancient wetter climate drier today was complex transition not simple "drying out". Furthermore, continues even today. diversity early habitable environments, ice ages recorded polar cap layering deposits, repeating patterns dust storms, revelation new features at limit are all part scientific return during nearly decade years. story mission, evolution capabilities, contributions our current understanding subject two dozen papers Icarus special issue, MRO: Sixteen Years Observing Changing Mars. Three describe more detail instrument operations products over mission; several analysis techniques radar, construction 3-dimensional views, atmospheric sounder, enabling better retrievals dusty lower atmosphere. Other report recent research including, but limited to, dune movement, roles water carbon dioxide surface change, attempts understand formation fading enigmatic recurring slope lineae. This paper describes general aspects spacecraft, payload, mission as context issue papers; it also summarizes results support events phase basis give time history discovery effort.

Язык: Английский

Процитировано

2
Revising the Basal Permittivity of the South Polar Layered Deposits of Mars With a Surficial Dust Cover DOI Creative Commons
C. Grima, W. Kofman, Alain Hérique

и другие.

Geophysical Research Letters, Год журнала: 2024, Номер 51(12)

Опубликована: Июнь 22, 2024

Abstract Bright basal reflections from the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) have been proposed to be consistent with permittivities characteristic of a wet material beneath south polar layered deposits (SPLD). The characterization recently formed impact crater highlight existence several meters thick ice‐poor layer associated unit blanketing large portion SPLD. We revise radar propagation model used invert permittivity by including surficial thin layer. find that inverted is highly sensitive properties such layer, solutions ranging common dry rocks an unambiguously base. advocate toward better cover assess or nature base, possibly reconcile most literature on topic.

Язык: Английский

Процитировано

1