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The measurement of G using the MSL torsion balance

This paper describes the improvements that have been made to our measurement of the Newtonian gravitational constant (G) since our last published value of G in 1995. As a result of a new measurement of G made with the improved apparatus, we have discovered some second-order corrections that were omitted from the previous measurement. New values for G are presented; both from the latest measurement and a recalculated value from our previous measurement. Our latest values are G = 6.6742(7) × 10-11 m3 kg-1 s-2 for the most recent measurement and G = 6.6746(10) × 10-11 m3 kg-1 s-2 for the recalculated 1995 value. These two values agree to within their uncertainties.