FUNCTION  fMuNuFromEq

Compute stripe coordinates from Equatorial

Compute mu, nu from @ra,@dec, @node,@incl

Input and output parameters

nametypelengthinoutpnum
@stripeint4input3
@rafloat8input1
@decfloat8input2
@nodefloat8input4
@inclfloat8input5
mufloat8output1
nufloat8output2