high-precision GPS unit

high-precision GPS unit

Detailed Description

A high-precision GPS unit (on white "T" in foreground) records its position at a ground control point along Pohoiki Road. This marker was painted in July 2018 and is visible in numerous aerial photographs taken by USGS Hawaiian Volcano Observatory geologists throughout KÄ«lauea's lower East Rift Zone eruption last summer. GPS data are recorded over a period of four minutes at each location, enabling vertical precision of approximately 18 cm (7 in).


Image Dimensions: 3024 x 3036

Date Taken:

Location Taken: US