Methods

Time

C (m/s)

C-error (m/s)

g (m/s²)

Geodimeter

1953

299,792,400

110

9.811856

1953

299,792,200

130

9.818074

1955

299,792,400

400

9.816501

1967

299,792,500

50

9.810565

1971

299,792,375

60

9.819047

Laser

1972

299,792,460

6

9.794161

1974

299,792,459

0.8

9.811856

1978

299,792,458.8

0.2

9.811856

1979

299,792,458.1

1.9

9.80616

1983

299,792,458.6

0.3

9.800849