G23A-1046
A Direct Comparison of Two High Precision Relative Gravity Meters at Optimal Performance
Tuesday, 15 December 2015
Poster Hall (Moscone South)
Derek van Westrum, NOAA National Geodetic Survey, Boulder, CO, United States
Abstract:
NGS has maintained and operated GWR Superconducting Gravimeter #024 since 1995. It has been widely considered one of the most quiet instruments from that era. It was recently upgraded with state of the art electronics and its operating parameters reoptimzied. A Micro‑g LaCoste gPhoneX, installed on a high precision tilt table, was collocated with the SG at the Table Mountain Geophysical Observatory near Boulder, CO and the two instruments operated side by side for approximately two months. Results in both the frequency domain and selected time series from large seismic signals (e.g. earthquakes) will be presented, allowing for a direct comparison between the instruments in identical, ideal conditions.
