Scintrex CG-6 AUTOGRAV gravity meter,

Procurement Summary

The National Geodetic Survey (NGS) requires a precise and portable relative terrestrial gravimeter for executing relative gravity surveys in support of gravity field models associated with the National Spatial Reference System (NSRS), which the Office of NGS defines and maintains. The NSRS is a consistent coordinated system that defines latitude, longitude, height, scale, gravity, and orientation throughout the United States. In addition to a network of Continuously Operating Reference Stations (CORS) supporting three-dimensional positioning activities, the NSRS includes a network of permanently marked points; a consistent, accurate, and up-to-date national shoreline; and a set of accurate models describing dynamic, geophysical processes that affect spatial measurements. For this purpose, a portable gravimeter must achieve gravity measurements that are as accurate or are more accurate than our portable absolute gravimeter (Micro-g LaCoste A10 Absolute Gravimeter) that is capable of measuring gravity accurately to 10-7 m/s2 or better (Equivalent to 10 microGal or µGal).

Yes

Yes