User Manual 4.0 Celestial bodies - Historique des versions

Admin : /* JPL ephemerides */

2018-02-21T16:16:22Z

JPL ephemerides

Admin le 21 février 2018 à 13:58

2018-02-21T13:58:51Z

← Version précédente		Version du 21 février 2018 à 13:58
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	\|-		\|-
	\|Orekit		\|Orekit
	\|[{{~~PathCurrentJavaDoc~~}}/fr/cnes/sirius/patrius/bodies/package-summary.html Package fr.cnes.sirius.patrius.bodies]		\|[{{JavaDoc4.0}}/fr/cnes/sirius/patrius/bodies/package-summary.html Package fr.cnes.sirius.patrius.bodies]
	\|-		\|-
	\|Patrius		\|Patrius
	\|[{{~~PathCurrentJavaDoc~~}}/fr/cnes/sirius/patrius/bodies/package-summary.html Package fr.cnes.sirius.patrius.bodies]		\|[{{JavaDoc4.0}}/fr/cnes/sirius/patrius/bodies/package-summary.html Package fr.cnes.sirius.patrius.bodies]
	\|}		\|}

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	== Features Description ==		== Features Description ==
	=== Celestial bodies ===		=== Celestial bodies ===
	The Moon, the Sun and planets of the solar system are all represented by the [{{~~PathCurrentJavaDoc~~}}/fr/cnes/sirius/patrius/bodies/CelestialBody.html CelestialBody] interface. This class associates a name (eg Sun) to :		The Moon, the Sun and planets of the solar system are all represented by the [{{JavaDoc4.0}}/fr/cnes/sirius/patrius/bodies/CelestialBody.html CelestialBody] interface. This class associates a name (eg Sun) to :
	* a gravitational coefficient GM		* a gravitational coefficient GM
	*a body centered '''inertial''' frame (which can be retrieved with method <code>getInertiallyOrientedFrame()</code>).		*a body centered '''inertial''' frame (which can be retrieved with method <code>getInertiallyOrientedFrame()</code>).

Admin : /* Contents */

2018-02-21T07:48:23Z

Contents

@@ Ligne 395 : / Ligne 395 : @@
 == Contents ==
 === Interfaces ===
 === Classes ===
-|=(% colspan="3" %)Class|=(% colspan="6" %)Summary|=(% colspan="1" %)Javadoc
+{| class="wikitable"
-|(% colspan="3" %)'''CelestialBodyFactory'''|(% colspan="6" %)Factory class for bodies of the solar system.|(% colspan="1" %)[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/CelestialBodyFactory.html ...]
+|-
-|(% colspan="3" %)'''GeodeticPoint'''|(% colspan="6" %)Point location relative to a 2D body surface.|(% colspan="1" %)[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/GeodeticPoint.html ...]
+! scope="col"| Class
-|(% colspan="3" %)'''JPLEphemeridesLoader'''|(% colspan="6" %)Loader for JPL ephemerides binary files (DE 405, DE 406, ...).|(% colspan="1" %)[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/JPLEphemeridesLoader.html ...]
+! scope="col"| Summary
-|(% colspan="3" %)'''OneAxisEllipsoid'''|(% colspan="6" %)Modeling of a one-axis ellipsoid.|(% colspan="1" %)[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/OneAxisEllipsoid.html ...]
+! scope="col"| Javadoc
-|(% colspan="3" %)'''MeeusSun'''|(% colspan="6" %)Position of the Sun according to Meeus model. Three models with there appropriate equations are avaible : the standard model (former MeeusSun), Stela model (former MeeuSunStela) and an on-board model|(% colspan="1" %)[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/MeeusSun.html ...]
+|-
-|(% colspan="3" %)'''MeeusMoon'''|(% colspan="6" %)Position of the Moon according to Meeus model.|(% colspan="1" %)[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/MeeusMoon.html ...]
+|'''CelestialBodyFactory'''
-|(% colspan="3" %)'''BasicBoardSun'''|(% colspan="6" %)Direction of the Sun according to a basic board Sun model.|(% colspan="1" %)[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/BasicBoardSun.html ...]
+|Factory class for bodies of the solar system.
-|(% colspan="3" %)'''UserCelestialBody'''|(% colspan="6" %)User-defined celestial body|(% colspan="1" %)[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/UserCelestialBody.html ...]
+|[{{JavaDoc4.0}}/fr/cnes/sirius/patrius/bodies/CelestialBodyFactory.html ...]
 [[Category:User_Manual_4.0_Flight_Dynamics]]

Admin : /* Meeus Model */

2018-02-21T07:45:46Z

Meeus Model

@@ Ligne 157 : / Ligne 157 : @@
 Regarding the precision, one has to expect a maximum difference of 25593km in position for the Sun and a maximum angular difference of 34.6'' (wrt DE405 ephemerides). For the Moon, one has to expect a maximum difference of 26 km in position and a maximum angular difference of 15.2'' (wrt DE405 ephemerides). As for the performances (in terms of execution time), the Meeus model for the Sun is faster than the DE405 ephemerides. However, we did not come to the same conclusion for the Moon even by decreasing the degree of precision (number of terms taken into account to compute the latitude, longitude and distance which are needed to compute in fine the position of the Moon).
-|=(% colspan="3" %)|=(% colspan="3" %)Deviation in position wrt DE423|=(% colspan="3" %)Angular deviation wrt DE423
+{| class="wikitable"
-|(% colspan="3" %)'''Sun'''|(% colspan="3" %)12000 km|(% colspan="3" %)34.6''
+|-
-|(% colspan="3" %)'''Moon 62x66x46'''|(% colspan="3" %)12.4 km|(% colspan="3" %)15.2''
-|(% colspan="3" %)'''Moon 26x13x13'''|(% colspan="3" %)225 km|(% colspan="3" %)122''
+! scope="col"| Deviation in position wrt DE423
-|(% colspan="3" %)'''Moon 9x4x3'''|(% colspan="3" %)1591 km|(% colspan="3" %)889''
+! scope="col"| Angular deviation wrt DE423
-|=(% colspan="3" %)|=(% colspan="3" %)Deviation in position wrt DE405|=(% colspan="3" %)Angular deviation wrt DE405
+{| class="wikitable"
-|(% colspan="3" %)'''Sun'''|(% colspan="3" %)25593km|(% colspan="3" %)34.6''
+|-
-|(% colspan="3" %)'''Moon 62x66x46'''|(% colspan="3" %)26 km|(% colspan="3" %)15.2''
-|=(% colspan="3" %)|=(% colspan="3" %)Number of elementary operations|=(% colspan="3" %)Number of trigonometric operations
-|(% colspan="3" %)'''Sun'''|(% colspan="3" %)89|(% colspan="3" %)10
+{| class="wikitable"
-|(% colspan="3" %)'''Moon 62x66x46'''|(% colspan="3" %)2671|(% colspan="3" %)182
+|-
-|(% colspan="3" %)'''Moon 26x13x13'''|(% colspan="3" %)917|(% colspan="3" %)60
-|(% colspan="3" %)'''Moon 9x4x3'''|(% colspan="3" %)401|(% colspan="3" %)24
+! scope="col"| Number of elementary operations
 References for the tables :
@@ Ligne 177 : / Ligne 223 : @@
 * "Modèle MEEUS pour éphémérides Lune-Soleil : Compléments sur le nombre d'opérations", CNES DCT/SB/MS
-|=(% colspan="3" %)|=(% colspan="3" %)execution time - DE405|=(% colspan="3" %)execution time- MEEUS
+{| class="wikitable"
-|(% colspan="3" %)'''Sun'''|(% colspan="3" %)59 s 548 ms|(% colspan="3" %)19 s 938 ms
+|-
-|(% colspan="3" %)'''Moon 62x66x46'''|(% colspan="3" %)11 s 625 ms|(% colspan="3" %)3 mn 22 s 323 ms
-|(% colspan="3" %)'''Moon 26x13x13'''|(% colspan="3" %)11 s 625 ms|(% colspan="3" %)1 mn 17 s 74 ms
+! scope="col"| execution time - DE405
-|(% colspan="3" %)'''Moon 9x4x3'''|(% colspan="3" %)11 s 625 ms|(% colspan="3" %)40 s 326 ms
+! scope="col"| execution time- MEEUS
 In order to build such a Sun or Moon, one has to use the object MeeusSun or MeeusMoon which both extend AbstractCelestialBody. Note that it is not possible to build those celestial bodies from the CelestialBodyFactory, for the moment.

Admin le 20 février 2018 à 16:41

2018-02-20T16:41:38Z

← Version précédente		Version du 20 février 2018 à 16:41
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			__NOTOC__

	== Introduction ==		== Introduction ==
	=== Scope ===		=== Scope ===

Admin : /* Introduction */

2018-02-20T16:09:57Z

Introduction

← Version précédente		Version du 20 février 2018 à 16:09
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	The classes for bodies description are available in the package <code>bodies</code> of Patrius.		The classes for bodies description are available in the package <code>bodies</code> of Patrius.

	\|=Library\|=Javadoc		{\| class="wikitable"
	\| Orekit\|[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/package-summary.html Package fr.cnes.sirius.patrius.bodies]		\|-
	\| Patrius\|[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/package-summary.html Package fr.cnes.sirius.patrius.bodies]		! scope="col"\| Library
			! scope="col"\| Javadoc
			\|-
			\|Orekit
			\|[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/package-summary.html Package fr.cnes.sirius.patrius.bodies]
			\|-
			\|Patrius
			\|[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/package-summary.html Package fr.cnes.sirius.patrius.bodies]
			\|}

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

Admin le 19 février 2018 à 08:16

2018-02-19T08:16:53Z

Admin : Admin a déplacé la page Celestial bodies vers User Manual 4.0 Celestial bodies sans laisser de redirection

2018-02-19T08:10:17Z

Admin a déplacé la page Celestial bodies vers User Manual 4.0 Celestial bodies sans laisser de redirection

← Version précédente		Version du 19 février 2018 à 08:10
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Admin : 1 révision importée

2018-02-19T08:08:47Z

1 révision importée

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Admin le 19 février 2018 à 08:08

2018-02-19T08:08:46Z

← Version précédente		Version du 19 février 2018 à 08:08
Ligne 1 :		Ligne 1 :


	== Introduction ==		== Introduction ==
	=== Scope ===		=== Scope ===

← Version précédente		Version du 19 février 2018 à 08:16
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	The Moon, the Sun and planets of the solar system are all represented by the [{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/CelestialBody.html CelestialBody] interface. This class associates a name (eg Sun) to :		The Moon, the Sun and planets of the solar system are all represented by the [{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/CelestialBody.html CelestialBody] interface. This class associates a name (eg Sun) to :
	* a gravitational coefficient GM		* a gravitational coefficient GM
	*a body centered'''inertial''' frame (which can be retrieved with method <code>getInertiallyOrientedFrame()</code>).		*a body centered '''inertial''' frame (which can be retrieved with method <code>getInertiallyOrientedFrame()</code>).
	*a body centered'''rotating''' frame (which can be retrieved with method <code>getBodyOrientedFrame()</code>).		*a body centered '''rotating''' frame (which can be retrieved with method <code>getBodyOrientedFrame()</code>).

	Inertially-oriented and body-oriented frames are defined in the following way:		Inertially-oriented and body-oriented frames are defined in the following way:
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	When the user wants to create a JPLEphemeridesLoader, first of all, he must supply the folder where the DE 405 and DE 406 files are stored. Then he has to give the name of the file which contains the data (DE 405 or DE 406), the type of celestial body and a date (desired central date) as entries of the JPLEphemeridesLoader.		When the user wants to create a JPLEphemeridesLoader, first of all, he must supply the folder where the DE 405 and DE 406 files are stored. Then he has to give the name of the file which contains the data (DE 405 or DE 406), the type of celestial body and a date (desired central date) as entries of the JPLEphemeridesLoader.

	The first argument (name of the data file) may be <~~syntaxhighlight~~>null</~~syntaxhighlight~~>. In this case, Patrius takes the first compatible file found. If one wants only files from the DE 405 ephemerides, for instance, he has to give the String <code> "^unx[mp](\\d\\d\\d\\d)\\.(?:405)$"</code>. The last argument can also be <~~syntaxhighlight~~>null</~~syntaxhighlight~~>. If the central date is not mentionned an arbitrary 100 days range will be loaded whereas if it is mentionned all data within a +/-50 days range around this date will be loaded.		The first argument (name of the data file) may be <code>null</code>. In this case, Patrius takes the first compatible file found. If one wants only files from the DE 405 ephemerides, for instance, he has to give the String <code> "^unx[mp](\\d\\d\\d\\d)\\.(?:405)$"</code>. The last argument can also be <code>null</code>. If the central date is not mentionned an arbitrary 100 days range will be loaded whereas if it is mentionned all data within a +/-50 days range around this date will be loaded.

	Once the data is loaded, thanks to the JPLEphemeridesLoader, the user can create the celestial body with the method loadCelestialBody() of the JPLEphemeridesLoader class. To do so, the user has to be sure that all required data is loaded. Indeed, apart from the Moon, the Earth and the Earth-Moon barycenter, the creation of a celestial body requires some data on the Earth Moon barycenter and the Solar System barycenter in order to instanciate the frame in which the ephemerides of the celestial body will be defined. Therefore, the user has to create a JPLEphemeridesLoader for the Earth-Moon barycenter and the Solar System barycenter prior to creating the celestial body, otherwise Patrius will arbitrarily load a DE file to generate the corresponding ephemerides that are used afterwards for the generation of the frame. Then the user has to complete the list of the loaders of the CelestialBodyFactory with these two loaders before calling the method loadCelestialBody().		Once the data is loaded, thanks to the JPLEphemeridesLoader, the user can create the celestial body with the method loadCelestialBody() of the JPLEphemeridesLoader class. To do so, the user has to be sure that all required data is loaded. Indeed, apart from the Moon, the Earth and the Earth-Moon barycenter, the creation of a celestial body requires some data on the Earth Moon barycenter and the Solar System barycenter in order to instanciate the frame in which the ephemerides of the celestial body will be defined. Therefore, the user has to create a JPLEphemeridesLoader for the Earth-Moon barycenter and the Solar System barycenter prior to creating the celestial body, otherwise Patrius will arbitrarily load a DE file to generate the corresponding ephemerides that are used afterwards for the generation of the frame. Then the user has to complete the list of the loaders of the CelestialBodyFactory with these two loaders before calling the method loadCelestialBody().
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	\|(% colspan="3" %)'''BasicBoardSun'''\|(% colspan="6" %)Direction of the Sun according to a basic board Sun model.\|(% colspan="1" %)[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/BasicBoardSun.html ...]		\|(% colspan="3" %)'''BasicBoardSun'''\|(% colspan="6" %)Direction of the Sun according to a basic board Sun model.\|(% colspan="1" %)[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/BasicBoardSun.html ...]
	\|(% colspan="3" %)'''UserCelestialBody'''\|(% colspan="6" %)User-defined celestial body\|(% colspan="1" %)[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/UserCelestialBody.html ...]		\|(% colspan="3" %)'''UserCelestialBody'''\|(% colspan="6" %)User-defined celestial body\|(% colspan="1" %)[{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/UserCelestialBody.html ...]

			[[Category:User_Manual_4.0_Flight_Dynamics]]

User Manual 4.0 Celestial bodies - Historique des versions

Admin : /* JPL ephemerides */

Admin le 21 février 2018 à 13:58

Admin : /* Contents */

Admin : /* Meeus Model */