initial upload

lib/constants.h

@@ -0,0 +1,44 @@
+/*
+Define constants used, like the gravitational constant and unit conversions.
+
+Values are assigned in file constants.c
+
+All values are in SI units!
+*/
+
+#ifndef _TESSEROIDS_CONSTANTS_H_
+#define _TESSEROIDS_CONSTANTS_H_
+
+/* Mean Earth radius [\f$ m \f$] */
+extern const double MEAN_EARTH_RADIUS;
+
+/* The gravitational constant [\f$ m^3*kg^{-1}*s^{-1} \f$] */
+extern const double G;
+
+/* Conversion factor from SI units to Eotvos
+[\f$ \frac{1}{s^2} = 10^9\ Eotvos \f$] */
+extern const double SI2EOTVOS;
+
+/* Conversion factor from SI units to mGal
+[\f$ 1 \frac{m}{s^2} = 10^5\ mGal \f$] */
+extern const double SI2MGAL;
+
+/* Pi */
+extern const double PI;
+
+/* Minimum distance-to-size ratio for potential computations to be accurate */
+extern const double TESSEROID_POT_SIZE_RATIO;
+/* Minimum distance-to-size ratio for gravity computations to be accurate */
+extern const double TESSEROID_GX_SIZE_RATIO;
+extern const double TESSEROID_GY_SIZE_RATIO;
+extern const double TESSEROID_GZ_SIZE_RATIO;
+/* Minimum distance-to-size ratio for gravity gradient computations to be
+accurate */
+extern const double TESSEROID_GXX_SIZE_RATIO;
+extern const double TESSEROID_GXY_SIZE_RATIO;
+extern const double TESSEROID_GXZ_SIZE_RATIO;
+extern const double TESSEROID_GYY_SIZE_RATIO;
+extern const double TESSEROID_GYZ_SIZE_RATIO;
+extern const double TESSEROID_GZZ_SIZE_RATIO;
+
+#endif