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			__NOTOC__
			== Introduction ==

			=== Scope ===
			The "Orbital parameters" package contains classes to represent the orbital state of a space object. Several types of parameters are available (cartesian, keplerian, equinoctial... with different position angle definitions : true, mean, eccentric).
			Orbital parameters do not define a date nor a frame. To fully define an orbit, including date and frame, please refer to [FDY_Orbits_Home Orbits].

			=== Javadoc ===
			The classes for orbital parameters description are available in the package <code>fr.cnes.sirius.patrius.orbits.orbitalparameters</code>.

			{\| class="wikitable"
			\|-
			! scope="col"\| Library
			! scope="col"\| Javadoc
			\|-
			\| Patrius
			\|[{{JavaDoc4.3}}/fr/cnes/sirius/patrius/orbits/orbitalparameters/package-summary.html Package fr.cnes.sirius.patrius.orbits.orbitalparameters]
			\|}

			=== Links ===
			None as of now.

			=== Useful Documents ===
			None as of now.

			=== Package Overview ===
			All different orbital parameters types extend the abstract class AbstractOrbitalParameters and implement the interface IOrbitalParameters (the following class package may not contain all classes extending AbstractOrbitalParameters class).

			[[File:orbitalparameters.png\|center]]

			All conversions methods from one type to another are specifically handled by each type of orbital parameters, thus optimising conversions.

			== Features Description ==
			=== Available parameters ===
			The available parameters types are :
			* Cartesian : X, Y, Z, Vx, Vy, Vz
			* Keplerian : a, e, i, perigee argument, right ascension of ascending node, anomaly (in each position angle types)
			* Equinoctial : a, ex, ey (eccentricity vector), hx, hy (inclination vector), longitude argument (in each position angle types)
			* Alternate equinoctial : n (mean motion), ex, ey (eccentricity vector), hx, hy (inclination vector), longitude argument (in each position angle types but stored in mean)
			* Stela Equinoctial : a, ex, ey (eccentricity vector), ix, iy (inclination vector), mean longitude argument
			* Circular : a, ex, ey (eccentricity vector), i, right ascension of ascending node, latitude argument (in each position angle types)
			* Apsis (using radius) : periapsis, apoapsis, i, perigee argument, right ascension of ascending node, anomaly (in each position angle types)
			* Apsis (using altitude) : altitude of periapsis, altitude of apoapsis, i, perigee argument, right ascension of ascending node, anomaly (in each position angle types)
			* Equatorial : a, e, longitude of the periapsis (ω + Ω), ix (first component of inclination vector), iy (second component of inclination vector), anomaly (in each position angle types)
			* Reentry : altitude, latitude, longitude, velocity norm, slope of velocity, azimuth of velocity

			== Getting Started ==
			Any orbital parameters can be defined using the chosen constructor. Here is an example using circular parameters and true anomaly:

			<syntaxhighlight lang="java">
			final CircularParameters circularParameters = new CircularParameters(10000E3, 0.1, 0.2, 0.3, 0.4, 0.5, PositionAngle.TRUE, Constants.EGM96_EARTH_MU);
			</syntaxhighlight>

			Then conversions to any orbital parameters type can directly be obtained using the conversion routines. Here is an example of conversion to equinoctial parameters:

			<syntaxhighlight lang="java">
			final EquinoctialParameters equinoctialParameters = circularParameters .getEquinoctialParameters();
			</syntaxhighlight>

			== Contents ==

			=== Interfaces ===
			None as of now.

			=== Classes ===
			{\| class="wikitable"
			\|-
			! scope="col"\| Class
			! scope="col"\| Summary
			! scope="col"\| Javadoc
			\|-
			\|'''CartesianParameters'''
			\|Cartesian parameters object.
			\|[{{JavaDoc4.3}}/fr/cnes/sirius/patrius/orbits/orbitalparameters/CartesianParameters.html ...]
			\|-
			\|'''KeplerianParameters'''
			\|Keplerian parameters object.
			\|[{{JavaDoc4.3}}/fr/cnes/sirius/patrius/orbits/orbitalparameters/KeplerianParameters.html ...]
			\|-
			\|'''CircularParameters'''
			\|Circular parameters object.
			\|[{{JavaDoc4.3}}/fr/cnes/sirius/patrius/orbits/orbitalparameters/CircularParameters.html ...]
			\|-
			\|'''EquinoctialParameters'''
			\|Equinoctial parameters object.
			\|[{{JavaDoc4.3}}/fr/cnes/sirius/patrius/orbits/orbitalparameters/EquinoctialParameters.html ...]
			\|-
			\|'''AlternateEquinoctialParameters'''
			\|Alternate Equinoctial parameters object.
			\|[{{JavaDoc4.3}}/fr/cnes/sirius/patrius/orbits/orbitalparameters/AlternateEquinoctialParameters.html ...]
			\|-
			\|'''StelaEquinoctialParameters'''
			\|Stela equinoctial parameters object.
			\|[{{JavaDoc4.3}}/fr/cnes/sirius/patrius/orbits/orbitalparameters/StelaEquinoctialParameters.html ...]
			\|-
			\|'''EquatorialParameters'''
			\|Equatorial parameters object.
			\|[{{JavaDoc4.3}}/fr/cnes/sirius/patrius/orbits/orbitalparameters/EquatorialParameters.html ...]
			\|-
			\|'''ApsisRadiusParameters'''
			\|Apsis parameters object (using radius).
			\|[{{JavaDoc4.3}}/fr/cnes/sirius/patrius/orbits/orbitalparameters/ApsisRadiusParameters.html ...]
			\|-
			\|'''ApsisAltitudeParameters'''
			\|Apsis parameters object (using altitude).
			\|[{{JavaDoc4.3}}/fr/cnes/sirius/patrius/orbits/orbitalparameters/ApsisAltitudeParameters.html ...]
			\|-
			\|'''ReentryParameters'''
			\|Reentry parameters object.
			\|[{{JavaDoc4.3}}/fr/cnes/sirius/patrius/orbits/orbitalparameters/ReentryParameters.html ...]
			\|}


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