Speaker
Nils Heyer
(Uppsala University)
Description
We present a measurement of the refractive index of firn ice at Summit Station, the site of the Radio Neutrino Observatory in Greenland (RNO-G). The refractive index profile was determined, without relying on density data, by using absolute time-of-flight measurements with sub-nanosecond precision. We establish the consistency of these findings across several locations near Summit Station and both pulse polarizations. From these findings, we derive multiple parametrized models of the firn ice and their respective uncertainties. Furthermore, we test the consistency of the derived models with additional pulser measurements and compare the results to independent measurements of the density.
Author
Nils Heyer
(Uppsala University)