GravityEngine2.EarthAtmosphere Class Reference

Computes the acceleration due to drag in the Earth's atmosphere for a given height and velocity. More...

Static Public Member Functions
static int double3 a_out	Accel (ref ExternalAccel.EAStateData eaState, ref ExternalAccel.EADesc eaDesc, NativeArray< double3 > data, double scaleLtoKm, double scaleTtoSec, double scaleAccelToSI)
static double3[]	Alloc (double heightKm, double coeffDrag, double xsecArea, double massKg, uint massLU)
	Create a data[] block for core physics parameters/data and initialize.
static double	Density (double heightKm)
	Compute the density of the atmosphere at a given height in km.

Static Public Attributes
static int	status
	Determine acceleration due to atmospheric drag based on an exponential Earth atmopsphere model with a nominal density table. (Vallado 5th p572).
const int	STATUS_IMPACT = 1
const int	STATUS_NAN = 2
const int	STATUS_OK = 0

Detailed Description

Computes the acceleration due to drag in the Earth's atmosphere for a given height and velocity.

This is a SELF force because it depends on the mass of the specific body.

Member Function Documentation

Alloc()

static double3[] GravityEngine2.EarthAtmosphere.Alloc ( double heightKm, double coeffDrag, double xsecArea, double massKg, uint massLU )

static

Create a data[] block for core physics parameters/data and initialize.

Parameters

heightKm
coeffDrag
xsecArea
massKg
massLU

Returns

Density()

static double GravityEngine2.EarthAtmosphere.Density ( double heightKm )

static

Compute the density of the atmosphere at a given height in km.

Parameters

heightKm

Returns

density in kg/m^3

Member Data Documentation

status

int GravityEngine2.EarthAtmosphere.status

static

Determine acceleration due to atmospheric drag based on an exponential Earth atmopsphere model with a nominal density table. (Vallado 5th p572).

This requires the current mass of the ship. For a re-entering ship this can be configured and remain constant. For ascent the mass will be highly time varying and needs to be linked to the ExtAccel representing the real-time mass. For maximum accuracy this is done on a time-step basis:

• this block can be configured to

Parameters

eaState
eaDesc
data
scaleLtoKm
scaleTtoSec
scaleAccelToSI

Returns

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The documentation for this class was generated from the following file:

• ge2/GE2/Assets/GravityEngine2/Runtime/Core/ExternalAcceleration/EarthAtmosphere.cs