We employed various spectroscopic techniques (hyperspectral, Laser Raman, and Fourier-Transform Infra-Red) combined with X-ray Diffraction (XRD) and Electron Probe Micro Analysis (EPMA) to understand the spectral-compositional relationships of the Cr-spinel (Chromian spinel) present in chromitite bodies associated with Sittampundi Anorthosite Complex (SAC), southern India. The bands/lenses of Cr-spinel are found as layers (few centimeters to 6 meters thick) intercalated with anorthosites and clinopyroxenites of the SAC. Cr-spinels of the SAC exhibit a Fe-, Al-rich composition.

Copiapite (Fe2+Fe3+4(SO4)6(OH)2·20 H2O) and rozenite (Fe2+(SO4)· 4H2O) are secondary hydrous sulfate minerals, mostly formed because of oxygenation and weathering events of primary sulfides on Earth. These secondary sulfate minerals are significant in defining past geological environments on Earth and other rocky planets such as Mars. We discuss here the results of chemical and spectral analyses of copiapite and rozenite found in massive sulfide zones associated with banded iron formations (BIFs) in the Wayanad region in Kerala, southern India.

Protostellar jets serve as the principal signature of ongoing star formation activity. Observations have revealed that the radio emission from protostellar jets arise from a combination of thermal free-free and non-thermal synchrotron emission mechanisms. The observed radio spectra of protostellar jets can be explained with the help of emission models and we have developed, for the first time, a simplistic numerical model that is applicable for narrow as well as wide-angle protostellar jets, and could explain the signatures of synchrotron emission in their radio spectra.

Measurement of particulate matter (PM) constituent such as black carbon (BC) over urban sites is critically important owing to its adverse health and climate impacts. However, the impacts associated with BC are poorly understood primarily because of the scarcity and uncertainties of measurements of BC. Here, we present BC measurement at an urban site of Delhi using a characterized continuous soot monitoring system (COSMOS) for a year-long period, i.e., from September, 2019 to August, 2020.

Aerosols distributed in the troposphere can scatter and absorb solar radiation and modify the Earth's radiation budget and cloud properties. The combined effect of scattering and absorption by particles is defined as aerosol extinction coefficient, is a measure of the alteration of radiant energy as it passes through the atmosphere. The aerosol extinction coefficient was derived with the space-borne lidar Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) aboard the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) over the Indian region during 2008–2018.

In the research paper authored by Mohit Singh et al. in 2024, published in the Journal of Aerosol Science and Technology (AST), the estimation of the mass absorption cross-section (MAC) of black carbon was conducted. This estimation was achieved through simultaneous measurements of black carbon utilizing filter-based instruments, namely a characterized continuous soot monitoring system (COSMOS) and Aethalometer. The study was carried out at four distinct sites: Alert, Barrow, Ny-Ålesund, and Pallas, all situated in the Arctic region.

The systematic study of the EM wave propagation in ON to ON-Body using the twelve-cylinder phantom model which aids in static as well as dynamic system modelling is investigated using systematic simulation and experimental measurements in advancement microwave research Lab at the department of Avionics by Elizabeth George and Dr. Chinmoy Saha.