Uncategorised

atmospheric science

Electronics and Instrumentation Laboratory (EIL)

The electronics and instrumentation facility at NCESS campus support fabrication of equipments such as, Atmospheric Electric Field Mill, Rain Drop Charge Sensor, Air Earth Current Density Sensor and Gerdien Condenser related to atmospheric electricity measurements. The essential components are circuit designing, mechanical designing & drawing and calibration of instruments. The fibre reinforced plastic (FRP) printed circuit board for the input circuits requires special layout design since the insulation of the FRP is insufficient as the circuits are sensitive. Normal electronic layout design softwares cannot be used for designing PCBs for these input circuits. Further the very high value resistances (glass encapsulated resistances) used in these circuits are expensive and require special care. After fabrication of the input circuits along with the sensors need to be calibrated and conduct burn-in test before deployment in the field. The electronics laboratory facility thus caters to the design, fabrication, testing and calibration of extremely high sensitive input circuits at NCESS.

Rain Drop Charge Sensor

Rain Drop Charge Sensor - CropThe Rain Drop Charge Sensor installed in NCESS campus. The sensor assembly is supported by six legs fastened to a triangular platform.The Rain Drop Charge Sensor is an indigenously developed instrument to measure the magnitude and polarity of electric charge in raindrop. Size and fall velocity of raindrop also can be estimated from the measurements. The sensor is mounted vertically and the rain drop is allowed to pass through the cylindrical sensor plate. Current to and fro from the sensor, due to charging and discharging process constitute current of the order of fraction of pico Ampere. This current is converted to voltage for processing and recording. It will measure the charge in drops from about 10 pC to 100 nC.

Atmospheric Electric Field Mill (EFM)

Atmospheric Electric Field Mill CropThe Atmospheric Electric Field Mill is a sensor used for measuring the vertical electric field in the atmosphere. The Field Mill is designed to measure the electric field in the charged Cumulonimbus (Cb) cloud. At the time of convective precipitation, electric field measurements show high field, which ensures the presence of convective clouds. During stratiform precipitation, weak or normal values of field are exhibited. Thereby the presence of stratiform and convective clouds can be confirmed with electric field measurements. In the basic instrument, an earthed metal plate is alternately exposed to and shielded from the vertical electric field using two electrically grounded metal plates with alternately open and closed sectors of which one rotates. The instrument normally mounted at the surface with the collecting plate facing upward.

Atmospheric Science Group (ASG)

asg

Atmospheric Science Group (ASG)

asg
  • Thermodynamical and microphysical processes of clouds
  • Dynamics of thunderstorms and lightning
  • Cloud-aerosol feedback processes and its influence on weather systems

nita sukumar1-100x122

Mrs. Nita Sukumar

Scientific Assistant Gr. B, Atmospheric Processes (AtP)

Email : This email address is being protected from spambots. You need JavaScript enabled to view it., This email address is being protected from spambots. You need JavaScript enabled to view it.

Phone(Off) : 0471-2511671

Phone(Res) : 0471-2730540

Fax : 0471-2442280

Education:

BCA : 2009, Bachelor of Computer Application, University of Kerala.
Diploma : 2001, Diploma in Electronics Engineering, State Board of Technical Education, Kerala.

Professional Career:

2015 - Present Scientific Assistant Gr. B, National Centre for Earth Science Studies.
2010 - 2015 Scientific Assistant Gr. A, National Centre for Earth Science Studies.

Publications:

  1. Sumesh R K, Resmi E A, Unnikrishnan C K, Dharmadas Jash, Sreekanth T S, Mol Resmi M C, Rajeevan K, Nita S, Ramachandran K K, 2019, Microphysical aspects of tropical rainfall during Bright Band events at mid and high-altitude regions over Southern Western Ghats, India. Atmospheric Research, 227 178–197. (IF:3.7).
  2. Sreekanth T. S., Hamza Varikoden, Nita Sukumar, G. Mohan Kumar. Microphysical characteristics of rainfall during different seasons over a coastal tropical station using Disdrometer. Hydrol Process. 2017. doi:10.1002/hyp.11202.
  3. Rubina Shaikh, Vasumathi G. Prabitha, Tapas Kumar Dora, Supriya Chopra, Amita Maheshwari, Kedar Deodhar,Bharat Rekhi, Nita Sukumar, C. Murali Krishna, Narayanan Subhash.. A comparative evaluation of diffuse reflectance and Raman spectroscopy in the detection of cervical cancer. J Biophotonics. 2017;10(2):242-252. doi:10.1002/jbio.201500248.
  4. Raji, S., Subhash, N., Ravi, V., Saravanan, R., Mohanan, C., Nita, S., Kumar T. Detection and Classification of Mosaic Virus Disease in Cassava Plants by Proximal Sensing of Photochemical Reflectance Index. J Indian Soc Remote Sens. 2016;44(6):875-883. doi:10.1007/s12524-016-0565-6.
  5. V. G. Prabitha, S. Suchetha J. J, P. Rema, KV Baiju, Nita Sukumar, Anita Mathews P, Sebastian, N. Subhash. Multi-spectral diffuse reflectance imaging for detection of cervical lesions: a pilot study. Int al J Eng Sci Innov Technol. 2014;3(6):169-177.
  6. Sadasivan Nair Raji, Narayanan Subhashab, Velumani Ravi, Raju Saravanan, Changatharayil N. Mohananan, Sukumar Nita & Thangaraj Makesh Kumar. Detection of mosaic virus disease in cassava plants by sunlight-induced fluorescence imaging: a pilot study for proximal sensing. Int J Remote Sens. 2015;36(11):2880-2897. doi:10.1080/01431161.2015.1049382.
  7. Ragi M S, Muralidharan V, Nita Sukumar, Neethu Sha A P. Short-term assessment of FPM concentration in the urban and rural ambient air environments of an Indian tropical area at Thiruvananthapuram, Kerala. Int J Geol Earth Environ Sci. 2013;3(3):52-60.

M Ismail-100x122

Mr. M. Mohamed Ismail

Scientific Officer Gr 2

Email :This email address is being protected from spambots. You need JavaScript enabled to view it., This email address is being protected from spambots. You need JavaScript enabled to view it.

Phone(Off) : 0471-2511642

Phone(Res) : 0471-2394833 Mobile :+91-8547394833

Fax :

Education:

B.Sc. Degree in Physics, 1978 (Madurai University)

Professional Training:

 

Training on “High reliability interconnection & electronic fabrication technique” at VSSC, Trivandrum

News and Events

Research Updates