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Browsing by Author "Sharma, Ameeth"

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Aerosol measurements over South Africa using LIDAR, Satellite and Sun Photometer

Author: Sivakumar, V ; Tesfaye, M ; Alemu, W ; Sharma, Ameeth ; Bollig, C ; Mengistu, G Date: May 2010 In this study, the authors present the climatological picture of aerosols over South Africa using 20 years of Stratosphere Aerosol and Gas Experiment (SAGE-II) satellite, 6–10 years of AErosol RObatic NETwork (AERONET) and ground based mobile ... Read more
Aerosol measurements over Southern Africa using LIDAR, satellite and sun-photometer

Author: Sivakumar, V ; Tesfaye, M ; Alemu, W ; Moema, D ; Sharma, Ameeth ; Bollig, C ; Mengistu, G Date: Aug 2009 This presentation provides aerosol measurement over Southern Africa, using LIDAR, satellite and sun-photometer. Aerosol formation and processes are also given. Read more
Atmospheric aerosol load morphological classification and retrieved visibility based on lidar backscatter measurements

Author: Tesfaye, M ; Sivakumar, V ; Mengistu, G ; Botai, J ; Sharma, Ameeth ; Bollig, C ; Rautenbach, CJdWH Date: 2010 In this paper, the tropospheric aerosol load morphological classification and its impact on temporal variation of visibility are investigated using a continuous 23-hour single channel CSIR-NLC mobile LIDAR backscatter measurement. The trajectory ... Read more
Celebrating the Year of Light….. from medicine to security with Optical Coherence Tomography

Author: Singh, A ; Sharma, Ameeth ; Roberts, T ; Khutlang, Rethabile ; Ramokolo, Lesiba R ; Marome, N ; Webb, L ; Botha, N ; Karsten, A ; Strauss, Hencharl J Date: Oct 2015 This poster Celebrating the Year of Light….. from medicine to security with Optical Coherence Tomography was presented at the CSIR’s 5th Conference, 8-9 October 2015. Read more
CSIR National Laser Centre develops a high speed OCT system

Author: Sharma, Ameeth ; Singh, Ann ; Roberts, Ted ; Ramokolo, Lesiba R ; Van der Westhuizen, Corrie Date: Nov 2016 The optical coherence technique (OCT) technique, which was demonstrated by Fercher and Huang in the early 90s, has made significant strides in bio-medical diagnostic applications in the fields of dermatology, dentistry and ophthalmology. Other ... Read more
CSIR NLC - South Africa - mobile LIDAR - system description

Author: Sivakumar, V ; Sharma, Ameeth ; Moema, D ; Bollig, C ; Van Der Westhuizen, C ; Van Wyk, H Date: May 2008 A mobile LIDAR system is being developed at the Council for Scientific and Industrial Research (CSIR) National Laser Centre (NLC), Pretoria (25°5' S; 28°2' E), South Africa. The system is primarily designed for measuring trace gases/pollutants ... Read more
CSIR NLC mobile lidar observation of cirrus cloud

Author: Sivakumar, V ; Sharma, Ameeth ; Chiloane, K ; Naidoo, S ; Lynch, E Date: Sep 2011 In this paper, the authors present a night-time continuous CSIR-NLC mobile observation of highaltitude cirrus cloud. The LIDAR measurements will also elucidate the aerosol concentration, optical depth, cloud position, thickness and other ... Read more
CSIR South Africa mobile LIDAR - First scientific results: comparison with satellite, sun photometer and model simulations

Author: Sivakumar, V ; Tesfaye, M ; Alemu, W ; Moema, D ; Sharma, Ameeth ; Bollig, C ; Mengistu, G Date: Nov 2009 The authors present the first scientific results from the Council for Scientific and Industrial Research-National Laser Centre (CSIR-NLC) mobile LIght Detection And Ranging (LIDAR) and its validation and comparison with other ground-based and ... Read more
CSIR-NLC mobile LIDAR for atmosphere remote sensing

Author: Sivakumar, V ; Tesfaye, M ; Botai, J ; Moema, D ; Sharma, Ameeth ; Bollig, C ; Hannes Rautenbach, CJ Date: Jul 2009 A mobile LIDAR (LIght Detection And Ranging) system is being developed and employed for atmosphere remote sensing at the Council for Scientific and Industrial Research (CSIR) National Laser Centre (NLC), Pretoria (25.45 S;28.16 E), South ... Read more
CSIR-NLC mobile LIDAR: first scientific results

Author: Sivakumar, V ; Tesfaye, M ; Moema, D ; Sharma, Ameeth ; Bollig, C Date: Jul 2009 In this paper, researchers present the obtained first scientific results from CSIR-NLC mobile LIDAR (LIght Detection And Ranging) and its validation/comparison with other ground and space-borne measurements. The LIDAR results are compared ... Read more
Development of 2-channel (532 nm and 355 nm) mobile LIDAR for mapping particulate matter in the atmosphere

Author: Sivakumar, V ; Bollig, C ; Sharma, Ameeth ; Tesfaye, M Date: Sep 2010 In this paper, the authors describe the developmentof 2-Channel (532 nm and 355 nm) mobile LIDAR system for studying atmospheric particulate matter. The system is currently tested in house at the Council for Scientific and Industrial Research ... Read more
Dialogue design for the openphone system

Author: Ndwe, TJ ; Sharma, Ameeth ; Kgampe, M ; Kuun, C Date: Nov 2008 Skilful dialogue design in an interactive voice response system has facilitated the effective use of a telephone-based health information syatem ny caregivers to HIV/AIDS-infected childern in Botswana. The intended users, caregivers, can ... Read more
Evaluating the potential of automated telephony systems in rural communities: Field assessment for project Lwazi of HLT Meraka

Author: Gumede, T ; Plauche, M ; Sharma, Ameeth Date: Nov 2008 The authors describe sociological fieldwork conducted in the autumn of 2008 in two rural communities of South Africa. Tshidilamalomo, in North West Province, and Kgautswane, in Limpopo Province. The goal of the fieldwork was to evaluate the ... Read more
A high speed OCT system developed at the CSIR National Laser Centre

Author: Sharma, Ameeth Date: Jul 2016 Light based techniques continue to gain momentum in different spheres of diagnostic and therapeutic applications as a result of their non-invasive, noncontact properties. One such technique is Optical Coherence tomography (OCT). Since it was ... Read more
A high speed OCT system developed at the CSIR National Laser Centre (paper)

Author: Sharma, Ameeth ; Singh, Ann ; Roberts, Ted ; Ramokolo, Lesiba R ; Strauss, Hencharl J Date: Jul 2016 Light-based techniques continue to gain momentum in different spheres of diagnostic and therapeutic applications due to their non-invasive, non-contact properties. One such technique is Optical Coherence tomography (OCT). Since first being ... Read more
LIDAR for atmosphere research over Africa

Author: Sivakumar, V ; Moema, D ; Bollig, C ; Sharma, Ameeth ; Mbatha, N ; Malinga, S ; Mengistu, G ; Bencherif, H ; Keckhut, P Date: Nov 2008 This paper describes the LIDAR for atmosphere research over Africa and current initiatives being undertaken in South Africa. A mobile LIDAR system is being developed at the Council for Scientific and Industrial Research (CSIR) National Laser ... Read more
Retrieval of atmospheric boundary layer height by CSIR NLC mobile LIDAR, Pretoria (25.5° S; 28.2° E), South Africa

Author: Sivakumar, V ; Sharma, Ameeth ; Bollig, C Date: Jul 2011 In this paper, the authors present the preliminary methods for detection of the boundary layer based on backscattered signals from a mobile LIDAR (LIght Detection And Ranging) developed at Council for Scientific and Industrial Research (CSIR) ... Read more
Retrieval of relative humidity from CSIR-NLC mobile LIDAR backscatter measurements

Author: Tesfaye, M ; Sivakumar, V ; Botai, J ; Moema, D ; Sharma, Ameeth ; Bollig, C ; Hannes Rautenbach, CJ deW ; Mengistu, G Date: Sep 2009 The CSIR-NLC mobile LIDAR has been operated at the University of Pretoria during October 2008 for a better understanding of the atmosphere's boundary layer evolution and aerosol (solid particles suspended in the air) concentrations. The ... Read more
A review of the mobile LIDAR system developed at the CSIR and a proposed improvement of the system

Author: Shikwambana, L ; Sivakumar, V ; Sharma, Ameeth Date: Jul 2012 LIDAR is an acronym for light detection and ranging, it is analogous to radar (radio detection and ranging), except that it is based on discrete light pulses and measured travel times. We report on the mobile LIDAR system developed at the ... Read more
Rugged and compact mid-infrared solid-state laser for avionics applications

Author: Esser, MJD ; Preussler, D ; Sharma, Ameeth ; Jacobs, Cobus ; Bollig, C Date: Nov 2009 In order to demonstrate the feasibility of a helicopter-based application using advanced laser technology, the authors have developed a rugged and compact mid-infrared solid-state laser. The requirement for the laser was to simultaneously ... Read more

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