1980
Type of resources
Keywords
Publication year
Scale
Topics
-
D53/B1-189 Vertical scale: 100
-
H55/B1-65 Vertical scale: 10
-
These documents have been scanned by the GA Library. Please refer to the document for contents.
-
These documents have been scanned by the GA Library. Please refer to the document for contents.
-
These documents have been scanned by the GA Library. Please refer to the document for contents.
-
These documents have been scanned by the GA Library. Please refer to the document for contents.
-
No abstract available
-
No abstract available
-
No abstract available
-
Gravity meters with a quartz mechanism can be calibrated on tilt tables, on hillside calibration ranges with stations at different altitude, or on level calibration ranges with stations at the same altitude. Twenty Worden, Sharpe, and Scintrex gravity meters have been calibrated in Canberra on a PEG-1 tilt table borrowed from the Soviet Academy of Sciences. These calibrations agree, to within experimental error, with tilt calibrations by the manufacturers in North America, and calibrations based on sea-level stations along the Australian Calibration Line. Calibrations on hillside calibration ranges differ systematically from other calibrations, and indicate a mean altitude effect of (2.5 ± 0.5) X 10^-3 um s^-2 m^-1. This altitude effect is higher than the mean of (1.5 ± 0.3) X 10^-3 micro m s^-2 m^-1 found by pressure-chamber studies in North America and Europe. If quartz-mechanism gravity meters are used either in base station gravity networks, or for field stations in areas with over 500 m of relief, then a correction should be made for this altitude effect, particularly if the anomalies are to be used for geodetic purposes.