Radar images of the Moon at 6-meter wavelength

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dc.contributor.authorVierinen, Juha
dc.contributor.authorTveito, Torbjørn
dc.contributor.authorGustavsson, Björn
dc.contributor.authorKesaraju, Saiveena
dc.contributor.authorMilla, Marco
dc.date.accessioned2018-08-06T18:12:46Z
dc.date.available2018-08-06T18:12:46Z
dc.date.issued2017-11
dc.description.abstractWe present new range-Doppler images of the Moon using 6-mwavelength. The radar images were obtained using the Jicamarca Radio Observatory 49.92  MHz radar. The observations were performed using circular polarization on transmit and two orthogonal linear polarizations on receive, allowing scattering images to be obtained with the polarization matched to the transmitted wave (polarized), and at a polarization orthogonal to the transmitted wave (depolarized). Due to the long wavelength that penetrates efficiently into the subsurface of the Moon, the radar images are especially useful for studies of subsurface composition. Two antenna interferometry on receive was used to remove the Doppler north-south ambiguity. The images have approximately 10  km resolution in range 20  km resolution in Doppler, allowing many large scale features, including maria, terrae, and impact craters to be identified. Strong depolarized return is observed from relatively new larger impact craters with large breccia and shallow regolith. Terrae regions with less lossy surface material also appear brighter in both depolarized and polarized images. A large region in the area near the Mare Orientale impact basin has overall higher than mean radar backscatter in both polarized and depolaried returns, indicating higher than average presence of relatively newly formed large breccia in this region. Mare regions are characterized by lower polarized and depolarized return, indicating that there is higher loss of the radio wave in the subsurface, reducing the echo. We also report unexpected low polarized and depolarized backscatter from an old impact basin in the Schiller–Schickard region, as well as from the region poleward from Mare Imbrium.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationVierinen, J., Tveito, T., Gustavsson, B., Kesaraju, S., & Milla, M. (2017). Radar images of the Moon at 6-meter wavelength.==$Icarus, 297,$==179-188. https://doi.org/10.1016/j.icarus.2017.06.035es_ES
dc.identifier.doihttps://doi.org/10.1016/j.icarus.2017.06.035es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalIcaruses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2273
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.relation.ispartofurn:issn:0019-1035
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_ES
dc.subjectMoones_ES
dc.subjectSynthetic aperture radares_ES
dc.subjectDoppler effectes_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleRadar images of the Moon at 6-meter wavelengthes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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