The 1987 southeastern Alaska gravity calibration range: Absolute and relative gravity measurements

Details The 1987 southeastern Alaska gravity calibration range: Absolute and relative gravity measurements The 1987 southeastern Alaska gravity calibration range: Absolute and relative gravity measurements

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.7661s&link_type=abstract

Journal of Geophysical Research, Volume 94, Issue B6, p. 7661-7666

Physics

Geophysics

7

Geodesy And Gravity: Standards And Absolute Measurements, Geodesy And Gravity: Instruments And Techniques

Scientific paper

In June 1987 a gravimeter calibration range was set up in southeastern Alaska and the Yukon territory, as part of a geophysical determination of the Newtonian gravitational constant. Absolute gravity measurements were made between the range endpoints using the Institute of Geophysics and Planetary Physics absolute gravity meter. The calibration range spans 171.841+/-0.014 mGal, with a midpoint g value of 9.81746500 ms-2. Relative gravity meters, including a LaCoste and Romberg borehole gravity meter, were read along this range. A scale factor correction (SFC) for borehole meter 14 was found to be (8.1+/-1.5)×10-4, and for meter G-349 the correction was (-3.3+/-1.7)×10-4. The SFC for meter D-85 has an upper bound of +/-1.0×10-4.

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