Blended wind fields for wave modeling of tropical cyclones in the South China Sea and East China Sea

A random forest algorithm for nowcasting of intense precipitation events

Prediction of convective events using multi-frequency radiometric observations at Kolkata

Retrieval of atmospheric properties with radiometric measurements using neural network

Anomalies in relative humidity profile in the boundary layer during convective rain

Visible light-induced functionalization of indazole and pyrazole: a recent update.

Visible-light-induced metal-free coupling of C(sp3)-H sources with Heteroarenes

The effects of the convective rain on various atmospheric parameters have been investigated at Kolkata (22.57°N, 88.37°E), India, during pre-monsoon and monsoon period of 2013. Various parameters like cloud base height and depth, liquid water content, rain rate and rain drop size distribution (DSD) are observed concurrently. The atmospheric electric field measured with an electric field monitor and the attenuation and depolarisation of satellite signals measured by a Ku-band receiving system are also studied during rain events. The instability indices obtained from radiometric measurements and the rain height profiles from micro rain radar are used to classify rain into two types, namely, convective and stratiform. The signatures of rain events on multi-technique observations are studied to indicate the various aspects of convective processes at a tropical location.

Multi-technique observations of convective rain events at a tropical location

Study of tropospheric delay over Indian region from MODIS, NCEP/NCAR data and ground based water vapor measurements at Kolkata

Precipitable water vapour (PWV) is an important input for numerical weather prediction model, meteorology and high-precision navigational applications. Conventional methods for the determination of PWV using radiosonde are not sufficient owing to poor temporal resolution, whereas radiometer-derived PWV is reliable only in fair weather conditions. Global positioning system (GPS) is a very useful and cost-effective tool to determine PWV continuously in all weather conditions. The processing of GPS data to extract the PWV information is, however, very complicated due to very small effect of the PWV (~0.5% of total delay) on GPS frequencies than other sources of delay and errors and requires a network of GPS in differential configuration for such purpose. The authors show how the problem can be handled in a standalone dual-frequency GPS receiver in a relatively less complicated manner with reasonable accuracy. The performances of different dry tropospheric delay models are also investigated. The methodology is tested with GPS measurements at Kolkata (22.57°N, 88.37°E) and Bangalore (13.01°N, 77.5°E). The results indicate that the proposed methodology can be implemented for PWV estimation using single GPS receiver with satisfactory performance.

https://ietresearch.onlinelibrary.wiley.com/doi/pdf/10.1049/iet-rsn.2013.0312

Souvik Majumder

Papers

Visible light-induced functionalization of indazole and pyrazole: a recent update.

Visible-light-induced metal-free coupling of C(sp3)-H sources with Heteroarenes

Multi-technique observations of convective rain events at a tropical location

Study of tropospheric delay over Indian region from MODIS, NCEP/NCAR data and ground based water vapor measurements at Kolkata

Simplistic approach for water vapour sensing using a standalone global positioning system receiver