CentralBodyGravityModel#

class ansys.stk.core.stkobjects.astrogator.CentralBodyGravityModel#

IntEnum

Overview#

ZONALS_TO_J4

ZonalsToJ4 - (various) Gravity model for all central bodies except Sun, Earth and Moon.

EARTH_SIMPLE

Earth Simple gravity model.

WGS84

WGS84 - (Earth) World Geodetic System 1984; WGS 84 was created by the Defense Mapping Agency (DMA).

EGM96

EGM96 - (Earth) Earth Gravity Model 1996, a geopotential model of the Earth consisting of spherical harmonic coefficients complete to degree and order 360. Developed jointly by NGA (formerly known as NIMA), NASA Goddard and Ohio State University.

GEMT1

GEMT1 - (Earth) Goddard Earth Model T1.

JGM2

JGM2 - (Earth) Joint Gravity Model version 2, a model that describes the Earth gravity field up to degree and order 70, developed by NASA/GSFC Space Geodesy Branch, the University of Texas Center for Space Research and CNES.

JGM3

JGM3 - (Earth) Joint Gravity Model version 3, a model that describes the Earth gravity field up to degree and order 70, developed by the University of Texas and NASA/GSFC.

WSG84EGM96

WGS84 EGM96 - (Earth) Uses the coefficients from EGM96 with the shape model of WGS84. This model is the recommended gravity model of the WGS84 definition document: NIMA TR8350.2, Third Edition, 4 July 1997.

WGS84_OLD

WGS84 old - (Earth) Old version of WGS84.

GLGM2

GLGM2 - (Moon) GM = 4.9028029535968e+12, reference distance = 1,738,000 m.

LP165P

LP165P - (Moon) GM = 4.902801056E+12, reference distance = 1,738,000.0 m.

ICARUS1987

Icarus1987 - (Mercury) GM = 2.203209e+013, reference distance = 2,439,000 m. Reference: Anderson, J. J., Colombo, G., Esposito, P. B., Lau E. L., and Trager, G. B. ‘The Mass, Gravity Field, and Ephemeris of Mercury’, Icarus 71, 337-349, 1987.

MGNP180U

MGNP180U - (Venus) GM = 3.248585920790000E+14, reference distance = 6,051,000.0 m.

GMM1

GMM1 - (Mars) GM = 4.28283579647735e+13, reference distance = 3,394,200.0 m.

GMM2B

GMM2B - (Mars) GM = 4.28283719012840e+13, reference distance = 3,397,000 m. Reference: These numbers came from the GMM-2B model published at NASA and were gotten from Journal of Geophysical Research, November 2000.

MARS50_C

Mars50c - (Mars) GM = 4.2828370371000e+13, reference distance = 3,394,200 m.

JUP230

JUP230 - (Jupiter) GM = 1.26686535e+017, reference distance = 71,492,000 m. Reference: Jacobson, R. A. The JUP230 orbit solution, 2003.

ASTRON2004

Astron2004 - (Saturn) GM = 3.7931284e+016, reference distance = 60,330,000 m.

ASTRON_ASTRO1991

AstronAstro1991 - (Neptune) GM = 6.835107e+015, reference distance = 25,225,000 m.

ICARUS2001

Icarus2001 - (Callisto) GM = 7.179292e+12, reference distance = 2,410,300 m.

SCIENCE1998

Science1998 - (Europa) GM =3.20272e+012, reference distance = 1,565,000 m.

NATURE1996

Nature1996 - (Ganymede) GM = 9.8866e+12, reference distance = 2,634,000 m.

J_GEO_RES2001

JGeoRes2001 - (Io) GM = 5.96e+12, reference distance = 1,821,600 m.

GGM01C

GGM01C - (Earth).

GGM02C

GGM02C - (Earth).

WGS72_ZONALS_TO_J4

WGS72 ZonalsToJ4 - (Earth).

LP100J

LP100J - (Moon).

LP100K

LP100K - (Moon).

LP150Q

LP150Q - (Moon).

LP75G

LP75G - (Moon).

Import detail#

from ansys.stk.core.stkobjects.astrogator import CentralBodyGravityModel