Search Publications
Redistribution of lunar polar water to mid-latitudes and its role in forming an OH veneer
Delory, G. T.; Halekas, J. S.; Farrell, W. M. +4 more
We suggest that energization processes like ion sputtering and impact vaporization can eject/release polar water molecules residing within cold trapped regions with sufficient velocity to allow their redistribution to mid-latitudes. We consider the possibility that these polar-ejected molecules can contribution to the water/OH veneer observed as a…
Young viscous flows in the Lowell crater of Orientale basin, Moon: Impact melts or volcanic eruptions?
Srivastava, N.; Kumar, D.; Gupta, R. P.
Topographical, morphological and spectral reflectance studies have been carried out for a distinct resurface event inside Copernican aged Lowell crater (13.00°S 103.40°W), Orientale basin, using high resolution TC, MI-VIS, LROC-NAC, and M3 data from Kaguya, Lunar Reconnaissance Orbiter (LRO) and Chandrayaan-1 missions. The resurfacing i…
Solar wind reflection from the lunar surface: The view from far and near
Barabash, S.; Wurz, P.; McComas, D. J. +7 more
The Moon appears bright in the sky as a source of energetic neutral atoms (ENAs). These ENAs have recently been imaged over a broad energy range both from near the lunar surface, by India's Chandrayaan-1 mission (CH-1), and from a much more distant Earth orbit by NASA's Interstellar Boundary Explorer (IBEX) satellite. Both sets of observations hav…
Validation of methodology to derive elemental abundances from X-ray observations on Chandrayaan-1
Babu, B. R. S.; Narendranath, S.; Sreekumar, P. +2 more
The Chandrayaan-1 X-ray Spectrometer (C1XS) observed characteristic X-ray fluorescence (XRF) lines of major rock forming elements from the lunar surface during different solar flare conditions. As the Sun was undergoing an unusually low activity cycle during the observing period of C1XS (28th Nov. 2008-29th Aug. 2009), most observations were made …
Experimental validation of XRF inversion code for Chandrayaan-1
Narendranath, S.; Sreekumar, P.; Sudhakar, M. +5 more
We have developed an algorithm (x2abundance) to derive the lunar surface chemistry from X-ray fluorescence (XRF) data for the Chandrayaan-1 X-ray Spectrometer (C1XS) experiment. The algorithm converts the observed XRF line fluxes to elemental abundances with uncertainties. We validated the algorithm in the laboratory using high Z elements (20<Z…
An algorithm for geometric correction of full pass TMC imagery of Chandrayaan-1
Radhadevi, P. V.; Solanki, S. S.; Nagasubramanian, V. +4 more
This paper describes the development of an algorithm for geometric correction of Terrain Mapping Camera (TMC) imagery of Chandrayaan-1 (CH-1). The correction is based on a rigorous sensor model. The algorithm incorporates the camera geometry model, satellite data and lunar control points in a rigorous bundle adjustment updating the satellite model…