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Acceleration of gravity, function of latitude and altitude

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Acceleration due to gravity g (see 1.3.3.3.1) is given as a function of latitude and altitude:
g = 9.7803 (1+0.0053(sin(¥õ))^2) ? 3 ¡¿ 10^(-6) ¡¿ z
where
¥õ : Latitude (degree)  
z : Altitude (m)  

The international standard value of g is 9.80665 m/s^2.

*** Âü°í¹®Çå[References] ***

60193¨ÏIEC:1999, 165p
g = 9.7803*{1+0.0053*(sin(¥õ))^2}-3*10^(-6)*z
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