21. Also, he is credited with the invention of a " Gasgravimeter " ( gas gravimeter ). 22. The sensing instruments such as gravimeter , gravitational wave sensor and magnetometers detect fluctuations in the gravitational and magnetic field. 23. Relative pendulum gravimeters were superseded by the simpler LaCoste zero-length spring gravimeter, invented in 1934 by Lucien LaCoste. 24. Relative pendulum gravimeters were superseded by the simpler LaCoste zero-length spring gravimeter , invented in 1934 by Lucien LaCoste. 25. The changing gravity field can be detected by repeated land measurements with absolute gravimeters and recently by the GRACE satellite mission. 26. "' Gravimeter "'- Operation IceBridge also uses a gravity-measuring instrument known as a gravimeter. 27. "' Gravimeter "'- Operation IceBridge also uses a gravity-measuring instrument known as a gravimeter . 28. The LaCoste suspension with zero-length springs is also used in gravimeters because it is very sensitive to changes in gravity. 29. The majority of modern gravimeters use specially-designed metal or quartz noise, increasing the sensitivity and utility of the gravimeter. 30. The majority of modern gravimeters use specially-designed metal or quartz noise, increasing the sensitivity and utility of the gravimeter .
