Hossein Nahavandchi er professor i geodesi og geofysikk. Hans forskningsinteresser er klimaendringer/overvåking av jorden ved hjelp av satellittdata.

Biography:  Hossein Nahavandchi holds a PhD degree (1998) from Royal Institute of Technology in Stockholm. His primary research interest is satellite Gravimetry, Altimetry and GPS. He has been lecturing in the Geomatics and Geodesy fields since 1990. Hossein’s career includes being a member of staff at Isfahan University (as Senior Lecturer and Head of Department), Royal Institute of Technology in Stockholm (as Research Associate), Tehran University (as Assistant Professor), and Norwegian University of Science and Technology (as Associate Professor and Professor). He also worked for Iranian National Mapping Authority and National Cartographic Center (NCC)  in several functions. He has been vice-Dean, Dean, and the Rector of the College of Engineering, Division Director, Chair of the Borad and Board member of Research and Planning Division, and Education Department in Iran. His research projects and activities in Civil Engineering  (BOA activities) have attracted more than 120 million NOK to the university sector since 1991. They have also resulted in a strong international network. Over 155 publications and presentations are the results of his research projects.  

Mine forskningsområder

Nåværende forskning: Monitoring Ocean Microplastics using GPS Signals

We use spaceborne observations from a novel remote sensing technique. The technique utilizes reflected signals of Global Navigation Satellite Systems (GNSS) and is called GNSS-Reflectometry (GNSS-R). The project aims to provide a regularly updated worldwide map of microplastics distribution on the ocean surface. The observations used in the analysis are collected using bistatic sensors onboard the NASA CYGNSS mission over the equatorial and part of the mid-latitudes regions. More than four years of GNSS-R observations are used so far. An overall verification of the results is performed using three available global microplastics models. The overall microplastic concentration map produced from GNSS-R observations shows a noticeably good agreement with the models. The promising results suggest that the GNSS-R technique can be an effective geodetic tool for the constant monitoring of microplastics on the ocean surface.