Position measurements at GPS station HGRA (Hochgrat)

Measurements at GPS station HGRA in the Bavarian Alps are part of the Geodetic Alpine Integrated Network (GAIN) of the ALPS-GPSQUAKENET project.巴伐利亚阿尔卑斯山脉HGRA GPS监测站的观测数据，是ALPS-GPSQUAKENET项目旗下阿尔卑斯大地测量综合网络（Geodetic Alpine Integrated Network，GAIN）的组成部分。