Edited by: Toshitaka Tsuda, Eugenio Realini, Yoshinori Shoji, Akinori Saito, Masanori Yabuki and Masato Furuya
Recent advances in the field of atmosphere and ionosphere sensing by GNSS
and SAR technologies were discussed during three meetings, held in February
2016 and October 2016 in Italy hosted by the GEOlab of Politecnico di Milano,
and in March 2017 at the Research Institute for Sustainable Humanosphere
(RISH) of Kyoto University. This special issue collects high quality papers that
describe the findings reported during the workshop, not limited GNSS and SAR,
but including also ground-based radio and optical atmosphere sensing and
numerical weather predictions models.