User Manual 4.7 Celestial bodies - Historique des versions

Admin : /* Classes */

2021-05-07T09:17:16Z

Classes

← Version précédente		Version du 7 mai 2021 à 09:17
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	\|User-defined celestial body		\|User-defined celestial body
	\|[{{JavaDoc4.7}}/fr/cnes/sirius/patrius/bodies/UserCelestialBody.html ...]		\|[{{JavaDoc4.7}}/fr/cnes/sirius/patrius/bodies/UserCelestialBody.html ...]
			\|-
			\|'''UserIAUPole'''
			\|User-defined IAU pole motion
			\|[{{JavaDoc4.7}}/fr/cnes/sirius/patrius/bodies/UserIAUPole.html ...]
	\|-		\|-
	\|'''FacetCelestialBody'''		\|'''FacetCelestialBody'''

Admin : /* User-defined celestial bodies */

2021-05-07T09:16:16Z

User-defined celestial bodies

@@ Ligne 322 : / Ligne 322 : @@
 * Its position-velocity through time using a <code>PVCoordinateProvider</code> implementation.
 * Its gravitational constant.
-* Its pole motion using <code>IAUPole</code> implementation.
+* Its pole motion using <code>IAUPole</code> implementation or directly the <code>UserIAUPole</code> implementation.
 '''Example: building Ceres'''.
@@ Ligne 339 : / Ligne 344 : @@
 final double gm = 6.263E10;
-// Pole motion
+// Pole motion - Method 1 - Implementation if IAUPole interface
 final IAUPole pole = new IAUPole() {
      @Override
@@ Ligne 354 : / Ligne 359 : @@
+     }
 };
 // Build Ceres body

Admin : /* Celestial bodies */

2021-05-07T09:04:22Z

Celestial bodies

← Version précédente		Version du 7 mai 2021 à 09:04
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	* use the static methods of the <code>CelestialBodyFactory</code> to create instances of the most common celestial bodies (Moon, Sun, Jupiter, etc.). JPL Ephemeris data are used. Warning: using the factory requires to load JPL Ephemeris data beforehand.		* use the static methods of the <code>CelestialBodyFactory</code> to create instances of the most common celestial bodies (Moon, Sun, Jupiter, etc.). JPL Ephemeris data are used. Warning: using the factory requires to load JPL Ephemeris data beforehand.
	* use the simplified models (Meeus, etc.).		* use the simplified models (Meeus, etc.).
	* creates its own celestial body using the class <code>UserDefinedCelestialBody</code>		* creates its own celestial body using the class <code>UserDefinedCelestialBody</code> as well as its own pole motion using the class <code>UserIAUPole</code>.

	These methods are detailed in the following sections.		These methods are detailed in the following sections.

Admin : /* User-defined celestial bodies */

2021-05-07T09:02:44Z

User-defined celestial bodies

← Version précédente		Version du 7 mai 2021 à 09:02
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	'''Example: building Ceres'''.		'''Example: building Ceres'''.
	According to ~~[FDY_BODY_Links~~ IAU report], Ceres has the following parameters:		According to the IAU report, Ceres has the following parameters:
	* α = 291◦ ± 5◦		* α = 291◦ ± 5◦
	* δ = 59◦ ± 5◦		* δ = 59◦ ± 5◦

Admin : /* Ephemeris Loader */

2021-05-07T08:32:23Z

Ephemeris Loader

← Version précédente		Version du 7 mai 2021 à 08:32
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	For any celestial body of the Solar System, the actual computation of its position and velocity relies on the JPL planetary ephemerides files. These files are binary files and loaded thanks to the JPLEphemeridesLoader object.		For any celestial body of the Solar System, the actual computation of its position and velocity relies on the JPL planetary ephemerides files. These files are binary files and loaded thanks to the JPLEphemeridesLoader object.

	For the moment, this object is ~~only~~ able to load ~~the~~ DE ~~405 or the DE 406~~ files which are the most commonly used data files. ~~The former~~ covers the years 1600 to 2200 at maximum precision, the ~~latter~~ covers the years-3000 to +3000 at only slightly reduced precision. The DE 421 file which is the latest JPL ephemeris with fully consistent treatment of planetary and lunar laser ranging data (Folkner ''et al'' 2009) is not yet readable by JPLEphemeridesLoader. However the DE 405 file is the basis for the Astronomical Almanac and leads to sufficiently accurate results and, for most purposes, even the accuracy of DE 406 is sufficient.		For the moment, this object is able to load JPL DE XXX files and IMCCE INPOP files which are the most commonly used data files (see below for an exact list of accepted files). For instance with the most common files, the JPL DE 405 covers the years 1600 to 2200 at maximum precision, the JPL DE 406 covers the years-3000 to +3000 at only slightly reduced precision. The DE 405 file is the basis for the Astronomical Almanac and leads to sufficiently accurate results and, for most purposes, even the accuracy of DE 406 is sufficient.

	==== JPLEphemeridesLoader ====		==== JPLEphemeridesLoader ====
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	</syntaxhighlight>		</syntaxhighlight>

	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 XXX files are stored. Then he has to give the name of the file which contains the data (DE XXX), 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 <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)$"</code>. The last argument can also be <code>null</code>. If the central date is not mentionned an arbitrary 100 days range will be loaded whereas if it is mentionned all data within a +/-50 days range around this date will be loaded.		The first argument (name of the data file) may be <code>null</code>. In this case, Patrius takes the first compatible file found. If one wants only files from the DE 405 ephemerides, for instance, he has to give the String <code> "^unx[mp](\\d\\d\\d\\d)\\.(?:405)$"</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.
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	! scope="col"\| Created in...		! scope="col"\| Created in...
	! scope="col"\| Description		! scope="col"\| Description
	\|-
	~~\|DE102~~
	~~\|September 1981~~
	~~\|includes nutations but not librations.<br>~~
	~~Referred to the dynamical equator and equinox of 1950.<br>~~
	~~Covers JED 1206160.5 (-1410 APR 16) to JED 2817872.5 (3002 DEC 22)~~
	\|-		\|-
	\|DE200		\|DE200
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	Intended for the MESSENGER mission to Mercury.		Intended for the MESSENGER mission to Mercury.
	\|}		\|}

			==== IMCCE INPOP ephemerides ====

			The IMCCE INPOP ephemeris is available on IMCCE website.

			Available INPOP ephemerides :
			* 06b
			* 06c
			* 08a
			* 10a
			* 10b
			* 10e
			* 13c
			* 17a
			* 19a

	=== Simplified analytical models ===		=== Simplified analytical models ===

Admin le 7 mai 2021 à 07:30

2021-05-07T07:30:26Z

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User Manual 4.7 Celestial bodies - Historique des versions

Admin : /* Classes */

Admin : /* User-defined celestial bodies */

Admin : /* Celestial bodies */

Admin : /* User-defined celestial bodies */

Admin : /* Ephemeris Loader */

Admin le 7 mai 2021 à 07:30

Admin : Page créée avec « __NOTOC__ == Introduction == === Scope === This section presents the Trigonometric Polynomials implemented in PATRIUS as well as Fourier Series. === Javadoc === The trigo... »

Admin : /* Classes */

Admin : /* User-defined celestial bodies */

Admin : /* Celestial bodies */

Admin : /* User-defined celestial bodies */

Admin : /* Ephemeris Loader */

Admin : Page créée avec « NOTOC == Introduction == === Scope === This section presents the Trigonometric Polynomials implemented in PATRIUS as well as Fourier Series. === Javadoc === The trigo... »