On the Weakening of Chromospheric Magnetic Field in Active Regions (2008)
Nagaraju, K., Sankarasubramanian, K., Rangarajan, K. E.
Simultaneous measurement of line-of-sight (LOS) magnetic and velocity fields at the photosphere and chromosphere are presented. Fe I line at $\lambda6569$ and $H_{\alpha}$ at $\lambda6563$ are used...
An efficient modulation scheme for dual beam polarimetry (2007)
Nagaraju, K., Ramesh, K. B., Sankarasubramanian, K., Rangarajan, K. E.
An eight stage balanced modulation scheme for dual beam polarimetry is presented in this paper. The four Stokes parameters are weighted equally in all the eight stages of modulation resulting in...
Ground Based Microwave Radiometric Technique in Remote Sensing (2003)
Rangarajan, K. E, Varghese, B. A
As an important tool of atmospheric remote sensing, microwave radiometers are used for temperature profiling and vapor and liquid column measurements. In addition, ice water path can be retrieved...
Mohan Rao, D., Rangarajan, K. E, Abhyankar, K. D
We consider non-conservative Rayleigh scattering in finite atmospheres and study the polarization in the molecular lines both in the transmitted and reflected sunlight. We first investigate the...
Nagendra, K. N, Rangarajan, K. E, Rao, D. M
The combined effect of partial frequency redistribution by atoms (PRD) and noncoherent electron scattering (NCES) on line formation is studied, taking account of the polarization state of the...
Effects of Velocities on Ca II H and K Lines (1981)
Rangarajan, K. E, Mohan Rao, D, Peraiah, A
Ca II H and K (3968, 3933) and infrared triplet lines lamda lamda lamda 8498, 8662, 8542 were calculated in a very slowly expanding medium. Five level atom with continuum was considered. Radiative...