https://www.harry-otten-prize.org/wp-content/uploads/2024/09/HOP_header-graphic.png00adminhttps://www.harry-otten-prize.org/wp-content/uploads/2024/09/HOP_header-graphic.pngadmin2023-12-07 19:57:182024-09-25 20:03:24Update from the 2019 Prize Winners – A New Method of Measuring Atmospheric Refractivity