For albedo and thermal radiation pressure from the primary body set the following parameters:

Central Body Radiation Parameters | |
---|---|

Parameter | Description |

Albedo |
If true and the central body is the Earth, then Earth albedo is modeled using the Scenario.EarthDefinition.GroundReflectionModel file. For other central bodies, the reflection model is specified in the Scenario.CentralBodiesList. Allows the calculation of acceleration due to reflected sunlight off the primary body as it impinges on the satellite. This calculation uses Ck (below) as a coefficient of reflectivity on the satellite and Area (below) as the surface area of the satellite exposed to that force. Note that this is a computationally intensive model. Time/accuracy tradeoffs can be controlled using the grid spacing in the ground reflection model file. |

ThermalRadiationPressure |
If true and the central body is the Earth, then Earth thermal radiation pressure (emissivity) is modeled using the Scenario.EarthDefinition.GroundReflectionModel file. For other central bodies, the reflection model is specified in the Scenario.CentralBodiesList. Allows the black body (thermal) radiation from the primary body to be used in computing accelerations on the satellite. Note that this is a computationally intensive model. Time/accuracy tradeoffs can be controlled using the grid spacing in the ground reflection model file |

Ck | Thermal radiation pressure coefficient (dimensionless). |

Area | Cross-sectional area of the spacecraft in the selected distance unit squared, for computation of central body radiation. |

**Note:** Albedo and thermal radiation pressure
are not available when the primary body is the Sun.

ODTK 6.5