Facilities

There are 4 categories

Traditional geodetic instrument: 1 set of electronic distance meter (EDM), 3 theodolites, 5 precise levels

GPS/GNSS instruments:
(1) Receivers for GPS survey: 8 Trimble 4000 SSi/SSE, 6 Trimble 5700 (Fig.1)

Fig.1 Luzon GPS survey

(2) GPS/GNSS receivers for permanent stations: 40 Leica CRS1000/MC500, 30 Leica GRX1200 pro/1200GG/1200+GNSS, 12 Trimble NetR9

Dual-frequency continuous GPS/GNSS stations: 60 sites in Taiwan (including 4 remote mountain sites in collaboration with Caltech, Fig. 2), 22 sites in Luzon, Philippines (in collaboration with Philippine Institute of Volcanology and Seismology, PHIVOLCS).

Fig.2 Chitsai Lake (CHTS) continuous GPS station in the remote mountain area

Borehole strainmeter: 11 sites in eastern Taiwan (in collaboration with Carnegie Institution of Washington, CIW, Fig.3)

Fig.3 Installation of borehole strainmeter