NewGamePhysics.Physics.GravityMarsNormalModel Class Reference

Model of earth's gravity g based on an elliptical shape. More...

List of all members.

Static Public Member Functions

static double Calculate (double latitude)
 Calculate latitude dependent normal gravity of Mars. References: Hofmann-Wellenhof, B. & Moritz, H. (2006), Physical Geodesy, 2nd corr., Springer Wien NewYork. pp. 77-81. Huber, L. & Beebe, R. (2009), Nasa mars data archive. http://atmos.pds.nasa.gov/data_and_services/atmospheres_data/Mars/Mars.html.

Public Attributes

const double EquatorialGravity = 3.71
const double SemiMajorAxis = 3396.0
const double SemiMajorAxisJpl = 3397.0
const double GM = 4.282837519531400e+13
const double GMJpl = 42828.35796
const double RotationRate = 7.088218066303858e-05
const double RotationRateJpl = 7.088218081e-5
const double InverseFlattening = 196.877360
const double Flattening = 5.079304192e-3

Detailed Description

Model of earth's gravity g based on an elliptical shape.

Definition at line 16 of file GravityMarsNormalModel.cs.

Member Function Documentation

static double NewGamePhysics.Physics.GravityMarsNormalModel.Calculate ( double  latitude  )  [static]

Calculate latitude dependent normal gravity of Mars. References: Hofmann-Wellenhof, B. & Moritz, H. (2006), Physical Geodesy, 2nd corr., Springer Wien NewYork. pp. 77-81. Huber, L. & Beebe, R. (2009), Nasa mars data archive. http://atmos.pds.nasa.gov/data_and_services/atmospheres_data/Mars/Mars.html.

Parameters:
latitude The latitude in degrees.
Returns:
The gravity in m/s^2

Definition at line 74 of file GravityMarsNormalModel.cs.

00075         {
00076             // Model gravity for ellipse
00077             double latRad = latitude * Math.PI / 180.0;
00078             double sinLat = Math.Sin(latRad);
00079             double sin2Lat = Math.Sin(2.0 * latRad);
00080             double sinLat2 = sinLat * sinLat;
00081             double sin2Lat2 = sin2Lat * sin2Lat;
00082             double value = 3.7114219 + 0.02400635 * sinLat2 - 4.2212837e-5 * sin2Lat2;
00083             return value;
00084         }

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