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-rw-r--r--libtellurian_meridian_radius_radians.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libtellurian_meridian_radius_radians.c b/libtellurian_meridian_radius_radians.c
index f550289..d5213c1 100644
--- a/libtellurian_meridian_radius_radians.c
+++ b/libtellurian_meridian_radius_radians.c
@@ -9,7 +9,7 @@ libtellurian_meridian_radius_radians(double latitude)
double a = LIBTELLURIAN_EQUATORIAL_RADIUS;
double b = LIBTELLURIAN_POLAR_RADIUS;
double neg_e2 = fma(b / a, b / a, -1.0);
- double s = sin(latitude);
+ double s = sin(geodetic(latitude));
return fma(a, neg_e2, a) / pow(fma(neg_e2, s * s, 1.0), 1.5);
}