a = 638137

= -30

1 - sin = 0.99832640499

Formula for Radius of curvature in the meridian = a(1 - ) / (1 - sin)^(3/2)

I have been told that the value of = 6351377.104 but I can't get close to that given the above values.

Any help with working through is greatly appreciated.

NOTE: From my calculations I get : = 0.00669438002 This makes = 0.0818191910251 Can you please confirm this value or prove me wrong