下記の通り，米国コロラド大学のKristine Larson名誉教授のセミナーを開催します．Larson名誉教授は，GNSSを用いた地殻変動を含む広範囲の研究を行われている方で，名誉教授ではありますが，まだ50代の研究者です．今回は特にGNSSを地震計として用いるときに，様々な誤差源になりうる周辺環境（雪，土壌水分，植生，水位，火山の噴煙）モニタリングへの応用をお話ししていただきますので，是非ご参加下さい．

日時：2019年10月1日 PM1:00-2:30
場所：京都大学宇治キャンパス 防災研究所 地震予知研究センター 本館セミナー室（E-232D）
　　　（地図の情報は末尾に）
講演者：Kristine M. Larson 名誉教授（コロラド大学）
講演タイトル：GPSを地震計として用いる試みの中で得られた新雪，土壌水分，植生，水位，火山灰噴煙センサーとしての発展（仮訳）

Date and Time: Oct. 1, 2019, PM 1:00-2:30
Location: E232D, Main building of Uji Campus, Kyoto Univ.
Speaker: Dr. Kristine M. Larson (Professor Emerita of Aerospace Engineering Sciences, University of Colorado)
Title: How making GPS into a better seismometer led to the development of new snow, soil moisture, vegetation, water level, and ash plume sensors

Abstract:

About fifteen years ago I began working on developing techniques so that GPS could be used to measure ground displacements during large earthquakes.
At the time, almost all geodesists estimated station positions once per day, as this is entirely adequate for tectonic applications. Standard geodetic analysis tools (then and now) ignore the error caused by signals that reflect off the land surface. My group quickly realized that surface reflections were the largest error source in GPS seismology and developed tools to mitigate their impact. That early work in GPS seismology ultimately led us to new work in GPS interferometric reflectometry - where reflected GPS signals are used to turn a GPS antenna into a bi-static radar. The reflected GPS signals can be used to measure soil moisture, snow accumulation, tides and storm surges, permafrost melt, and vegetation water content. In this talk I will explain how GPS interferometric reflectometry works and share environmental products we derived from GPS data. I will also describe a volcanic plume monitoring method we developed based on things we learned from reflectometry.

会場は、以下の地図の27番のE棟の2階です。
http://www.kyoto-u.ac.jp/ja/access/campus/map6r_uji.html