Editing Kater's pendulum (section)

===Use===
[[File:Repsold.jpg|thumb|Gravimeter with variant of Repsold pendulum]]

The large increase in gravity measurement accuracy made possible by Kater's pendulum established [[gravimetry]] as a regular part of [[geodesy]]. To be useful, it was necessary to find the exact location (latitude and longitude) of the 'station' where a gravity measurement was taken, so pendulum measurements became part of [[surveying]]. Kater's pendulums were taken on the great historic [[Geodetic surveying|geodetic surveys]] of much of the world that were being done during the 19th century. In particular, Kater's pendulums were used in the [[Great Trigonometric Survey]] of India.

Reversible pendulums remained the standard method used for absolute gravity measurements until they were superseded by free-fall [[gravimeter]]s in the 1950s.<ref name="Torge">{{cite book 
  | last = Torge
  | first = Wolfgang
  | title = Geodesy: An Introduction
  | publisher = Walter de Gruyter
  | year = 2001
  | page = 177
  | url = https://books.google.com/books?id=pFO6VB_czRYC&pg=PA177
  | isbn = 3-11-017072-8}}</ref>