Investigation for water-ice within lunar polar PSR using Chandrayaan-2 DFSAR data.
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| Title: | Investigation for water-ice within lunar polar PSR using Chandrayaan-2 DFSAR data. |
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| Authors: | Shukla, Shital1 hodgeography@gujaratuniversity.ac.in, Shroff, Urvi1, Patel, Piyush1, Mohan, Shiv2 |
| Source: | Current Science (00113891). Apr2026, Vol. 130 Issue 7, p613-622. 10p. |
| Subjects: | Ice, Lunar craters, Synthetic aperture radar, Circular polarization, Polarimetry |
| Abstract: | Multi-frequency polarimetric observations from dual frequency synthetic aperture radar (DFSAR) and miniaturised synthetic aperture radar (Mini-SAR) were used to investigate four craters named as C1–C4 within the permanently shadowed Faustini crater floor, near the lunar south pole. Amongst these four craters, C1 exhibits plausibility of shallow subsurface water ice with enhanced circular polarisation ratio (CPR) at Sband and low mean cross-polarised backscattering coefficient. CPR greater than unity at L-band has been detected in an unnamed sub-km-scale crater (C2). Further, the CPR signature characterising the interior and exterior of the crater at L-band is observed to be unambiguously distinct, non-overlapping, and separated by a margin of 0.63. This distinct CPR signature is not observed at S-band, emphasising the plausibility of water ice in deeper layers. The crater C3 indicates erosion associated with subdued backscatter returns. The penetration ability of the L-band signal reveals buried rocks inside crater C4 associated with depolarised cross-polarisation (VH) returns, enhanced CPR, and high co-polarised backscattering coefficient. Polarimetric decomposition methods were used to emphasise the dominance of volume scattering in the deeper layer. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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