Dr. Karnam Raghunath Profile

Dr. Karnam Raghunath

Scientist/Engineer at National Atmospheric Research Lab

SPIE Involvement:

Author

Area of Expertise:

lidar remote sensing

Publications (8)

SPIE Journal Paper | 30 September 2020

Dictionary learning technique and penalized maximum likelihood for extending measurement range of a Rayleigh lidar

Varanasi Satya Sreekanth, Karnam Raghunath, Deepak Mishra

JARS, Vol. 14, Issue 03, 034529, (September 2020) https://doi.org/10.1117/12.10.1117/1.JRS.14.034529

KEYWORDS: Associative arrays, Signal to noise ratio, LIDAR, Photon counting, Chemical species, Denoising, Temperature metrology, Signal processing, Interference (communication), Wavelets

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Proceedings Article | 5 May 2016 Paper

Investigation of tropical cirrus cloud properties using ground based lidar measurements

Reji Dhaman, Malladi Satyanarayana, V. Krishnakumar, V. P. Mahadevan Pillai, G. S. Jayeshlal, K. Raghunath, M. Venkat Ratnam

Proceedings Volume 9876, 98760P (2016) https://doi.org/10.1117/12.2222314

KEYWORDS: Clouds, LIDAR, Optical properties, Atmospheric optics, Scattering, Crystals, Scalable video coding, Lawrencium, Climatology

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SPIE Journal Paper | 26 March 2014

Lidar investigations on the optical and dynamical properties of cirrus clouds in the upper troposphere and lower stratosphere regions at a tropical station, Gadanki, India (13.5°N, 79.2°E)

Vasudevannair Krishnakumar, Malladi Satyanarayana, Soman Radhakrishnan, Reji Dhaman, Glory Jayeshlal, Gopinathan Nair Motty, Vellara Mahadevan Pillai, Karnam Raghunath, Madineni Ratnam, Duggirala Rao, Pindlodi Sudhakar

JARS, Vol. 8, Issue 01, 083659, (March 2014) https://doi.org/10.1117/12.10.1117/1.JRS.8.083659

KEYWORDS: Clouds, LIDAR, Turbulence, Crystals, Lawrencium, Radar, Atmospheric optics, Aerosols, Mass attenuation coefficient, Multiple scattering

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SPIE Journal Paper | 1 January 2011

Investigations on the physical and optical properties of cirrus clouds and their relationship with ice nuclei concentration using LIDAR at Gadanki, India (13.5°N, 79.2°E)

Vasudevannair Krishnakumar, Malladi Satyanarayana, Soman Radhakrishnan, Reji Dhaman, Vellara Mahadevan Pillai, Karnam Raghunath, M. Venkat Ratnam, Duggirala Rao, Pindlodi Sudhakar

JARS, Vol. 5, Issue 1, 053567, (January 2011) https://doi.org/10.1117/12.10.1117/1.3662877

KEYWORDS: Clouds, LIDAR, Crystals, Optical properties, Lawrencium, Aerosols, Atmospheric optics, Backscatter, Analytical research, Signal attenuation

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SPIE Journal Paper | 1 November 2010

Optical properties of cirrus clouds at a tropical Indian station Gadanki, Tirupati (13.5°N, 79.2°E)

Soman Radhakrishnan, Malladi Satyanarayana, Vasudevannair Krishnakumar, Vellara Mahadevan Pillai, Karnam Reghunath, M. Venkat Ratnam, Duggirala Ramakrishna Rao

JARS, Vol. 4, Issue 01, 043559, (November 2010) https://doi.org/10.1117/12.10.1117/1.3525238

KEYWORDS: Clouds, Crystals, LIDAR, Backscatter, Lawrencium, Optical properties, Aerosols, Mass attenuation coefficient, Atmospheric particles, Atmospheric modeling

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SPIE Journal Paper | 1 January 2010

Laser radar characterization of atmospheric aerosols in the troposphere and stratosphere using range dependent lidar ratio

Satyanarayana Malladi, Radhakrishnan Radha, V. P. Mahadevan Pillai, Veerabuthiran Sangipillai, Presennakumar Bhargavan, Murty Vinjanampaty, Reghunath Karnam

JARS, Vol. 4, Issue 01, 043503, (January 2010) https://doi.org/10.1117/12.10.1117/1.3306573

KEYWORDS: LIDAR, Aerosols, Lawrencium, Mass attenuation coefficient, Atmospheric particles, Signal attenuation, Backscatter, Optical properties, Atmospheric modeling, Troposphere

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Proceedings Article | 29 December 2008 Paper

Microphysical parameters of cirrus clouds using lidar at a tropical station, Gadanki, Tirupati (13.5 degrees N, 79.2 degrees E), India

M. Satyanarayana, S-R. Radhakrishnan, V. Krishnakumar, V. Mahadevan Pillai, K. Raghunath

Proceedings Volume 7153, 71530Y (2008) https://doi.org/10.1117/12.806390

KEYWORDS: Clouds, LIDAR, Aerosols, Atmospheric particles, Mass attenuation coefficient, Earth's atmosphere, Optical properties, Troposphere, Signal attenuation, Ocean optics

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Proceedings Article | 29 December 2008 Paper

Influence of inland aerosol loading on the monsoon over Indian subcontinent

M. Satyanarayana, V. Krishnakumar, V. Mahadevan Pillai, S. Radhakrishnan, K. Raghunath

Proceedings Volume 7153, 715314 (2008) https://doi.org/10.1117/12.804935

KEYWORDS: Clouds, Aerosols, LIDAR, Atmospheric particles, Backscatter, Telescopes, Atmospheric monitoring, Atmospheric modeling, Optical properties, Mass attenuation coefficient

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Showing 5 of 8 publications

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