User Manual 3.3 Semi-analytical propagation - Historique des versions

Admin : /* Force Model */

2018-03-01T14:20:43Z

Force Model

← Version précédente		Version du 1 mars 2018 à 14:20
Ligne 269 :		Ligne 269 :
	===Force Model===		===Force Model===

	The code example here after follows the creation of the propagator and adds different forces. When giving the PotentialCoefficientsProvider provider (see the [[User Manual 3.3 Environment Models\|Earth Potential]] section for more information) with Stela Software values, this is a normal Stela Software propagation, meaning that the partial derivatives of the state elements are not computed. Please look at the Javadoc associated with every [[User Manual 3.3 Semi-analytical propagation\|Force Model]] constructors to have an overall look at the offered possibilities.		The code example here after follows the creation of the propagator and adds different forces. When giving the PotentialCoefficientsProvider provider (see the [[User Manual 3.3 Environment Models\|Earth Potential]] section for more information) with Stela Software values, this is a normal Stela Software propagation, meaning that the partial derivatives of the state elements are not computed. Please look at the Javadoc associated with every [[User Manual 3.3 Semi-analytical propagation#Force Model\|Force Model]] constructors to have an overall look at the offered possibilities.

	<syntaxhighlight lang="java">		<syntaxhighlight lang="java">

Admin : /* Force Model */

2018-03-01T14:19:36Z

Force Model

← Version précédente		Version du 1 mars 2018 à 14:19
Ligne 269 :		Ligne 269 :
	===Force Model===		===Force Model===

	The code example here after follows the creation of the propagator and adds different forces. When giving the PotentialCoefficientsProvider provider (see the [~~ORB_PHY_Home#HEarthpotential~~ Earth Potential] section for more information) with Stela Software values, this is a normal Stela Software propagation, meaning that the partial derivatives of the state elements are not computed. Please look at the Javadoc associated with every [~~ORB_GTO_Home#HForcesModel~~ Force Model] constructors to have an overall look at the offered possibilities.		The code example here after follows the creation of the propagator and adds different forces. When giving the PotentialCoefficientsProvider provider (see the [[User Manual 3.3 Environment Models\|Earth Potential]] section for more information) with Stela Software values, this is a normal Stela Software propagation, meaning that the partial derivatives of the state elements are not computed. Please look at the Javadoc associated with every [[User Manual 3.3 Semi-analytical propagation\|Force Model]] constructors to have an overall look at the offered possibilities.

	<syntaxhighlight lang="java">		<syntaxhighlight lang="java">

Admin : /* Central Body */

2018-03-01T14:17:35Z

Central Body

← Version précédente		Version du 1 mars 2018 à 14:17
Ligne 139 :		Ligne 139 :

	'''Tesseral terms'''		'''Tesseral terms'''
	Tesseral terms can be computed as well using <code>StelaTesseralAttraction</code>. Each effect of the tesseral harmonics terms which as a period greater than a user tunable value expressed as a multiple of the integrator step will be included. Maximum tesseral order is 15. Detailed algorithm can be found in STELA-NT-PRODUIT-134-CNES (see [~~ORB_GTO_Home#HUsefulDocuments~~ useful documents]).		Tesseral terms can be computed as well using <code>StelaTesseralAttraction</code>. Each effect of the tesseral harmonics terms which as a period greater than a user tunable value expressed as a multiple of the integrator step will be included. Maximum tesseral order is 15. Detailed algorithm can be found in STELA-NT-PRODUIT-134-CNES (see [[User Manual 3.3 Semi-analytical propagation\|useful documents]]).

	==== Solid tides ====		==== Solid tides ====

Admin : /* Useful Documents */

2018-03-01T14:14:54Z

Useful Documents

← Version précédente		Version du 1 mars 2018 à 14:14
Ligne 67 :		Ligne 67 :

	The algorithms used are described in the following documents :		The algorithms used are described in the following documents :
	~~(% style="margin-left:30px;list-style-type:square;" %)~~
	* STELA-NT-PRODUIT-7-CN		* STELA-NT-PRODUIT-7-CN
	* STELA-NT-ETUDES-72-IMCCE01/02		* STELA-NT-ETUDES-72-IMCCE01/02

Admin le 28 février 2018 à 09:27

2018-02-28T09:27:23Z

← Version précédente		Version du 28 février 2018 à 09:27
Ligne 54 :		Ligne 54 :

	Stela Software and its release notes, User Manual and Javadoc can be found following this link :		Stela Software and its release notes, User Manual and Javadoc can be found following this link :
	[https://logiciels.cnes.fr/content/stela?language=en Stela homepage]		;: [https://logiciels.cnes.fr/content/stela?language=en Stela homepage]

	'''Contact'''		'''Contact'''

	IF you are experiencing any issue with STELA Library, feel free to contact the STELA team using the email address below:		IF you are experiencing any issue with STELA Library, feel free to contact the STELA team using the email address below:
	[mailto:stela@cnes.fr stela@cnes.fr]		;: [mailto:stela@cnes.fr stela@cnes.fr]

	=== Useful Documents ===		=== Useful Documents ===
Ligne 78 :		Ligne 78 :
	This figure shows the general architecture of Stela GTO extrapolator:		This figure shows the general architecture of Stela GTO extrapolator:

	[[File:Stelagen.PNG\|center]]\|~~\|width="950"~~]]		[[File:Stelagen.PNG\|center\|950px]]

	==== Forces Model ====		==== Forces Model ====
Ligne 84 :		Ligne 84 :
	This following figure shows the architecture of Stela Forces model. This conception is very close to the theory explained in the [ORB_GTO_Home#HUsefulDocuments useful documents] section. For the sake of clarity, some perturbations are not displayed (solid tides in particular).		This following figure shows the architecture of Stela Forces model. This conception is very close to the theory explained in the [ORB_GTO_Home#HUsefulDocuments useful documents] section. For the sake of clarity, some perturbations are not displayed (solid tides in particular).

	~~(% style="text-align: center;" %)~~		[[File:StelaForceDiagram.png\|center\|950px]]
	[[[~~image~~:~~Images@~~StelaForceDiagram.png]

	== Features Description ==		== Features Description ==
Ligne 102 :		Ligne 101 :
	'''Integrator'''		'''Integrator'''

	All integrators included in the Commons-Math or in Commons-Math Addons can be used with STELA propagator. Nevertheless as the original tool has been validated with the 6^^th^^ order Runge-Kutta <code>RungeKutta6Integrator</code>, it is strongly recommanded to use it.		All integrators included in the Commons-Math or in Commons-Math Addons can be used with STELA propagator. Nevertheless as the original tool has been validated with the 6^^th^^ order Runge-Kutta <code>RungeKutta6Integrator</code>, it is strongly recommanded to use it.<br>
	For more information on integrators, please refer to the [MAT_ODE_Home#HIntegrators ordinary differential equations] page.		For more information on integrators, please refer to the [MAT_ODE_Home#HIntegrators ordinary differential equations] page.

Ligne 111 :		Ligne 110 :
	'''Partial Derivatives'''		'''Partial Derivatives'''

	Partial Derivatives can be computed adding some additional equations to the propagator; the user willing to compute state partial derivatives can create an instance of <code>StelaPartialDerivativesEquations</code> and then add it to the propagator using the method <code>addAdditionalEquations(StelaAdditionalEquations)</code>.		Partial Derivatives can be computed adding some additional equations to the propagator; the user willing to compute state partial derivatives can create an instance of <code>StelaPartialDerivativesEquations</code> and then add it to the propagator using the method <code>addAdditionalEquations(StelaAdditionalEquations)</code>.<br>
	Their computation depends on the force model included in the propagator. Beware that some force models do not provide partial dérivatives computation (see forces section below).		Their computation depends on the force model included in the propagator. Beware that some force models do not provide partial dérivatives computation (see forces section below).

	'''Time partial derivatives'''		'''Time partial derivatives'''

	Time partial derivatives can be retrieved from the propagator. Ask for time derivatives recording with: <code>StelaGTOPropagator.setStoreTimeDerivatives(boolean)</code>		Time partial derivatives can be retrieved from the propagator. Ask for time derivatives recording with: <code>StelaGTOPropagator.setStoreTimeDerivatives(boolean)</code><br>
	Then retrieve time partial derivatives using: <code>StelaGTOPropagator.getTimeDerivativesList()</code>		Then retrieve time partial derivatives using: <code>StelaGTOPropagator.getTimeDerivativesList()</code>

Ligne 391 :		Ligne 390 :
	===Partial Derivatives===		===Partial Derivatives===

	The partial derivatives as well as the short periods parameters are handled when creating the different forces.		The partial derivatives as well as the short periods parameters are handled when creating the different forces.<br>
	When willing to compute the partial derivatives, one should add the additional equations to the propagator in the following way :		When willing to compute the partial derivatives, one should add the additional equations to the propagator in the following way :

Ligne 407 :		Ligne 406 :
	</syntaxhighlight>		</syntaxhighlight>

	Please note that this step must be done AFTER adding all the forces to the propagator.		Please note that this step must be done AFTER adding all the forces to the propagator.<br>
	The stepHandler will then be a bit more complex; all the matrix manipulations are done in order to have a similar presentation to Stela and are not at all compulsory.		The stepHandler will then be a bit more complex; all the matrix manipulations are done in order to have a similar presentation to Stela and are not at all compulsory.

Ligne 723 :		Ligne 722 :

	== [[File:lightBulb.png]] Tips & Tricks ==		== [[File:lightBulb.png]] Tips & Tricks ==

			[[Category:User_Manual_3.3_Orbit_Propagation]]

Admin : /* Orbits */

2018-02-28T09:23:23Z

Orbits

← Version précédente		Version du 28 février 2018 à 09:23
Ligne 183 :		Ligne 183 :
	Stela equinoctial elements slightly differ from Orekit equinoctial elements. They are defined as follow:		Stela equinoctial elements slightly differ from Orekit equinoctial elements. They are defined as follow:

			{\| class="wikitable"
	\|~~=(% colspan~~="3" %)Parameter~~\|=(% colspan~~="6" %)Definition		\|-
	\|~~(% colspan="3" %)~~'''a'''\|~~(% colspan="6" %)~~Semi-major axis		! scope="col"\| Parameter
	\|~~(% colspan="3" %)~~'''<math>\xi</math>'''\|~~(% colspan="6" %)~~<math>\xi =\omega +\Omega+M</math>		! scope="col"\| Definition
	\|~~(% colspan="3" %)~~'''ex'''\|~~(% colspan="6" %)~~<math>e_x = e \cos( \Omega + \omega )</math>		\|-
	\|~~(% colspan="3" %)~~'''ey'''\|~~(% colspan="6" %)~~<math>e_y = e \sin( \Omega + \omega )</math>		\|'''a'''
	\|~~(% colspan="3" %)~~'''ix'''\|~~(% colspan="6" %)~~<math>i_x = \sin(i / 2) \cos( \Omega )</math>		\|Semi-major axis
	\|~~(% colspan="3" %)~~'''iy'''\|~~(% colspan="6" %)~~<math>i_y = \sin(i / 2) \sin( \Omega )</math>		\|-
			\|'''<math>\xi</math>'''
			\|<math>\xi =\omega +\Omega+M</math>
			\|-
			\|'''ex'''
			\|<math>e_x = e \cos( \Omega + \omega )</math>
			\|-
			\|'''ey'''
			\|<math>e_y = e \sin( \Omega + \omega )</math>
			\|-
			\|'''ix'''
			\|<math>i_x = \sin(i / 2) \cos( \Omega )</math>
			\|-
			\|'''iy'''
			\|<math>i_y = \sin(i / 2) \sin( \Omega )</math>
			\|}

	== Getting Started ==		== Getting Started ==

Admin : Admin a déplacé la page Semi-analytical propagation vers User Manual 3.3 Semi-analytical propagation sans laisser de redirection

2018-02-28T09:22:28Z

Admin a déplacé la page Semi-analytical propagation vers User Manual 3.3 Semi-analytical propagation sans laisser de redirection

← Version précédente		Version du 28 février 2018 à 09:22
(Aucune différence)

Admin : /* Links */

2018-02-28T09:22:09Z

Links

← Version précédente		Version du 28 février 2018 à 09:22
Ligne 54 :		Ligne 54 :

	Stela Software and its release notes, User Manual and Javadoc can be found following this link :		Stela Software and its release notes, User Manual and Javadoc can be found following this link :
	~~(% style="margin-left:30px;list-style-type:square;" %)~~
	[https://logiciels.cnes.fr/content/stela?language=en Stela homepage]		[https://logiciels.cnes.fr/content/stela?language=en Stela homepage]

Ligne 60 :		Ligne 59 :

	IF you are experiencing any issue with STELA Library, feel free to contact the STELA team using the email address below:		IF you are experiencing any issue with STELA Library, feel free to contact the STELA team using the email address below:

	~~(% style="margin-left:30px;list-style-type:square;" %)~~
	[mailto:stela@cnes.fr stela@cnes.fr]		[mailto:stela@cnes.fr stela@cnes.fr]


	=== Useful Documents ===		=== Useful Documents ===

Admin : /* Javadoc */

2018-02-28T09:21:46Z

Javadoc

← Version précédente		Version du 28 février 2018 à 09:21
Ligne 14 :		Ligne 14 :
	The packages associated to Stela propagator are :		The packages associated to Stela propagator are :

	\|=~~(% colspan~~="3" %)Library~~\|=(% colspan~~="6" %)Javadoc		{\| class="wikitable"
	\|~~(% colspan="3" %)~~Patrius\|~~(% colspan="6" %)~~[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/package-summary.html Package fr.cnes.sirius.patrius.stela]		\|-
	\|~~(% colspan="3" %)~~Patrius\|~~(% colspan="6" %)~~[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/bodies/package-summary.html Package fr.cnes.sirius.patrius.stela.bodies]		! scope="col"\| Library
	\|~~(% colspan="3" %)~~Patrius\|~~(% colspan="6" %)~~[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/forces/package-summary.html Package fr.cnes.sirius.patrius.stela.forces]		! scope="col"\| Javadoc
	\|~~(% colspan="3" %)~~Patrius\|~~(% colspan="6" %)~~[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/forces/atmospheres/package-summary.html Package fr.cnes.sirius.patrius.stela.forces.atmospheres]		\|-
	\|~~(% colspan="3" %)~~Patrius\|~~(% colspan="6" %)~~[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/forces/drag/package-summary.html Package fr.cnes.sirius.patrius.stela.forces.drag]		\|Patrius
	\|~~(% colspan="3" %)~~Patrius\|~~(% colspan="6" %)~~[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/forces/gravity/package-summary.html Package fr.cnes.sirius.patrius.stela.forces.gravity]		\|[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/package-summary.html Package fr.cnes.sirius.patrius.stela]
	\|~~(% colspan="3" %)~~Patrius\|~~(% colspan="6" %)~~[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/forces/radiation/package-summary.html Package fr.cnes.sirius.patrius.stela.forces.radiation]		\|-
	\|~~(% colspan="3" %)~~Patrius\|~~(% colspan="6" %)~~[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/forces/noninertial/package-summary.html Package fr.cnes.sirius.patrius.stela.forces.noninertial]		\|Patrius
	\|~~(% colspan="3" %)~~Patrius\|~~(% colspan="6" %)~~[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/orbits/package-summary.html Package fr.cnes.sirius.patrius.stela.orbits]		\|[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/bodies/package-summary.html Package fr.cnes.sirius.patrius.stela.bodies]
	\|~~(% colspan="3" %)~~Patrius\|~~(% colspan="6" %)~~[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/propagation/package-summary.html Package fr.cnes.sirius.patrius.stela.propagation]		\|-
			\|Patrius
			\|[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/forces/package-summary.html Package fr.cnes.sirius.patrius.stela.forces]
			\|-
			\|Patrius
			\|[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/forces/atmospheres/package-summary.html Package fr.cnes.sirius.patrius.stela.forces.atmospheres]
			\|-
			\|Patrius
			\|[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/forces/drag/package-summary.html Package fr.cnes.sirius.patrius.stela.forces.drag]
			\|-
			\|Patrius
			\|[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/forces/gravity/package-summary.html Package fr.cnes.sirius.patrius.stela.forces.gravity]
			\|-
			\|Patrius
			\|[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/forces/radiation/package-summary.html Package fr.cnes.sirius.patrius.stela.forces.radiation]
			\|-
			\|Patrius
			\|[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/forces/noninertial/package-summary.html Package fr.cnes.sirius.patrius.stela.forces.noninertial]
			\|-
			\|Patrius
			\|[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/orbits/package-summary.html Package fr.cnes.sirius.patrius.stela.orbits]
			\|-
			\|Patrius
			\|[{{JavaDoc3.3}}/fr/cnes/sirius/patrius/stela/propagation/package-summary.html Package fr.cnes.sirius.patrius.stela.propagation]
			\|}

	=== Links ===		=== Links ===

Admin : /* Contents */

2018-02-28T09:20:38Z

Contents

Voir les modifications

User Manual 3.3 Semi-analytical propagation - Historique des versions

Admin : /* Force Model */

Admin : /* Force Model */

Admin : /* Central Body */

Admin : /* Useful Documents */

Admin le 28 février 2018 à 09:27

Admin : /* Orbits */

Admin : Admin a déplacé la page Semi-analytical propagation vers User Manual 3.3 Semi-analytical propagation sans laisser de redirection

Admin : /* Links */

Admin : /* Javadoc */

Admin : /* Contents */

Admin : /* Force Model */

Admin : /* Force Model */

Admin : /* Central Body */

Admin : /* Useful Documents */

Admin : /* Orbits */

Admin : Admin a déplacé la page Semi-analytical propagation vers User Manual 3.3 Semi-analytical propagation sans laisser de redirection

Admin : /* Links */

Admin : /* Javadoc */

Admin : /* Contents */