Disputation: Jon Håvard Hartveit Eriksrød

Doctoral candidate Jon Håvard Hartveit Eriksrød at the Department of informatics, Faculty of Mathematics and Natural Sciences, is defending the thesis Ultra-wideband In-situ Bi-static Snow SAR for Water and Stratigraphy Assessment for the degree of Philosophiae Doctor.

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The PhD defence and trial lecture are fully digital and streamed using Zoom. The host of the session will moderate the technicalities while the chair of the defence will moderate the disputation.

 

Ex auditorio questions: the chair of the defence will invite the audience to ask ex auditorio questions either written or oral. This can be requested by clicking 'Participants -> Raise hand'. 

 

Trial lecture

"Spaceborne and/or airborne SAR/radiometer sea-ice measurements"

 

Main research findings

The proposed radar snow sensing system is upward-looking and deployed stationary on the ground before snowfall. As snow is building up, structure and layers are continuously measured using microwaves over the entire snow season, capturing short term weather changes as well as seasonal changes.

The radar-based snow sensor is capable of directly measuring the individual permittivity and height of different snow layers from a single acquisition, without any additional assumptions or estiamtions. The  system was verified by measuring a stack of two different phantom materials. Successful dry snow permittivity measurements were conducted under NASA SnowEx 2017. The proposed instrument is also capable to measure the complex permittivity of the combined snowpack, providing true wet and dry snow measurements allowing for accurate assessment of equivalent water content.

 

 

 

Contact information to Department: Pernille Adine Nordby 

Published Sep. 4, 2020 10:56 AM - Last modified Sep. 15, 2020 9:17 AM