User Manual 4.18 Environment Models - Historique des versions

Admin tsn le 10 juin 2026 à 10:43

2026-06-10T10:43:59Z

← Version précédente		Version du 10 juin 2026 à 10:43
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	\|-		\|-
	\|'''MSISE2000'''		\|'''MSISE2000'''
	\|This class implements the ~~MSIS00~~ atmospheric model.		\|This class implements the MSIS atmospheric model (from a NRLMSIS sub-model).
	\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSISE2000.html ...]		\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSISE2000.html ...]
	\|-		\|-
	\|'''NRLMSISE00'''		\|'''NRLMSISE00'''
	\|This class implements the ~~NRLMSISE~~ 1.0 atmospheric model.		\|This class implements the NRLMSIS 1.0 atmospheric model.
	\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSIS/NRLMSISE00.html ...]		\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSIS/NRLMSISE00.html ...]
	\|-		\|-
	\|'''NRLMSISE20'''		\|'''NRLMSISE20'''
	\|This class implements the ~~NRLMSISE~~ 2.0 atmospheric model.		\|This class implements the NRLMSIS 2.0 atmospheric model.
	\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSIS/NRLMSISE20.html ...]		\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSIS/NRLMSISE20.html ...]
	\|-		\|-

Admin tsn le 10 juin 2026 à 10:42

2026-06-10T10:42:25Z

← Version précédente		Version du 10 juin 2026 à 10:42
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	Key Differences		Key Differences

	* ~~NRLMSISE-00~~:		* NRLMSISE00 (or NRLMSIS 1.0):
	** Relies on older mass spectrometer and incoherent scatter radar data. While robust, it often overestimates densities during extreme solar minimums and struggles with the precise "satellite drag" modeling required for modern space situational awareness.		** Relies on older mass spectrometer and incoherent scatter radar data. While robust, it often overestimates densities during extreme solar minimums and struggles with the precise "satellite drag" modeling required for modern space situational awareness.
	** Models the primary species (He, O, N2, O, Ar, H, N) and includes an "anomalous oxygen" component to account for satellite drag discrepancies.		** Models the primary species (He, O, N2, O, Ar, H, N) and includes an "anomalous oxygen" component to account for satellite drag discrepancies.

	* NRLMSIS 2.0:		* NRLMSISE20 (or NRLMSIS 2.0):
	** Incorporates decades of new data, including extensive satellite accelerometer measurements and improved occultation data. It is significantly more accurate in the thermosphere and exosphere, particularly during low solar activity.		** Incorporates decades of new data, including extensive satellite accelerometer measurements and improved occultation data. It is significantly more accurate in the thermosphere and exosphere, particularly during low solar activity.
	** Introduces a more rigorous treatment of atomic species. Notably, it includes Atomic Nitrogen (N) and Nitric Oxide (NO) as intrinsic parts of the model (though, as you noted in your previous translation, some implementations may still exclude NO depending on the reference version used). It also ensures better mass-density consistency.		** Introduces a more rigorous treatment of atomic species. Notably, it includes Atomic Nitrogen (N) and Nitric Oxide (NO) as intrinsic parts of the model (though, as you noted in your previous translation, some implementations may still exclude NO depending on the reference version used). It also ensures better mass-density consistency.
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	</syntaxhighlight>		</syntaxhighlight>

	Warning: the NRLMSISE-~~00model~~ is not continuous. There is a discontinuity every day (at 0h in UTC time scale). Discontinuities are however very small (1E-3 on a relative scale).		Warning: the NRLMSISE-00 model is not continuous. There is a discontinuity every day (at 0h in UTC time scale). Discontinuities are however very small (1E-3 on a relative scale).

	The main difference in usage between the models NRLMSISE-00 and NRLMSIS 2.0 is that :		The main difference in usage between the models NRLMSISE-00 and NRLMSIS 2.0 is that :
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	\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSISE2000.html ...]		\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSISE2000.html ...]
	\|-		\|-
	\|NRLMSISE00		\|'''NRLMSISE00'''
	\|This class implements the NRLMSISE 1.0 atmospheric model.		\|This class implements the NRLMSISE 1.0 atmospheric model.
	\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSIS/NRLMSISE00.html ...]		\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSIS/NRLMSISE00.html ...]
	\|-		\|-
	\|NRLMSISE20		\|'''NRLMSISE20'''
	\|This class implements the NRLMSISE 2.0 atmospheric model.		\|This class implements the NRLMSISE 2.0 atmospheric model.
	\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSIS/NRLMSISE20.html ...]		\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSIS/NRLMSISE20.html ...]

Admin tsn le 10 juin 2026 à 10:39

2026-06-10T10:39:25Z

← Version précédente		Version du 10 juin 2026 à 10:39
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	===== MSIS2000 Atmosphere model =====		===== MSIS2000 Atmosphere model =====

	The ~~NRLMSISE-00~~ empirical atmosphere ~~model was developed by Mike Picone~~, ~~Alan Hedin~~, and ~~Doug Drob. It describes~~ the ~~neutral temperature and densities in Earth's atmosphere from~~ ground to ~~thermospheric heights~~. (~~quoted from [http://nssdc~~.~~gsfc~~.~~nasa~~.~~gov])~~		The NRLMSIS series represents the gold standard for empirical neutral atmosphere models, used to predict temperature, density, and composition from the ground to the exosphere. The transition from NRLMSISE-00 (released in 2013) to NRLMSIS 2.0 (released in 2020) marks a significant leap in modeling accuracy and architectural design. PATRIUS implements both models.

	More information can be found at the [http://www.nrl.navy.mil/research/nrl-review/2003/atmospheric-science/picone/ Naval Research Laboratory website].		Key Differences

			* NRLMSISE-00:
			** Relies on older mass spectrometer and incoherent scatter radar data. While robust, it often overestimates densities during extreme solar minimums and struggles with the precise "satellite drag" modeling required for modern space situational awareness.
			** Models the primary species (He, O, N2, O, Ar, H, N) and includes an "anomalous oxygen" component to account for satellite drag discrepancies.

			* NRLMSIS 2.0:
			** Incorporates decades of new data, including extensive satellite accelerometer measurements and improved occultation data. It is significantly more accurate in the thermosphere and exosphere, particularly during low solar activity.
			** Introduces a more rigorous treatment of atomic species. Notably, it includes Atomic Nitrogen (N) and Nitric Oxide (NO) as intrinsic parts of the model (though, as you noted in your previous translation, some implementations may still exclude NO depending on the reference version used). It also ensures better mass-density consistency.
			** Version 2.0 enforces stricter physical constraints between temperature and density profiles, ensuring that the transition between the lower atmosphere and the thermosphere is physically smoother.

			Note that a new model NRLMSIS 2.1 has been presented in 2025. This model is not implemented yet in PATRIUS.

			More information can be found at the [http://www.nrl.navy.mil/research/nrl-review/2003/atmospheric-science/picone/ Naval Research Laboratory website] and [https://map.nrl.navy.mil/map/pub/nrl/NRLMSIS/ Geospace Science & Technology Branch]. Note that several adaptations have been made to optimize the JAVA model compare to these FORTRAN models.

	In order to use this atmosphere model, the user must proceed by giving the following arguments as inputs to the [{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/forces/atmospheres/MSISE2000.html MSISE2000] class :		In order to use this atmosphere model, the user must proceed by giving the following arguments as inputs to the [{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/forces/atmospheres/MSISE2000.html MSISE2000] class :

			* The empirical atmosphere model it self (NRLMSISE00 or NRLMSISE20)
	* Solar activity data (as a [{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/forces/atmospheres/MSISE2000InputParameters.html MSISE2000InputParameters])		* Solar activity data (as a [{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/forces/atmospheres/MSISE2000InputParameters.html MSISE2000InputParameters])
	* the Earth model (as a [{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/BodyShape.html BodyShape])		* the Earth model (as a [{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/bodies/BodyShape.html BodyShape])
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	// Create an instance of the atmosphere model		// Create an instance of the atmosphere model
	Atmosphere atmosModel = new MSISE2000(msiseData , earth, sun);		Atmosphere atmosModel = new MSISE2000(new NRLMSISE00(), msiseData , earth, sun);
	</syntaxhighlight>		</syntaxhighlight>

	Warning: ~~this model~~ is not continuous. There is a discontinuity every day (at 0h in UTC time scale). Discontinuities are however very small (1E-3 on a relative scale).		Warning: the NRLMSISE-00model is not continuous. There is a discontinuity every day (at 0h in UTC time scale). Discontinuities are however very small (1E-3 on a relative scale).

			The main difference in usage between the models NRLMSISE-00 and NRLMSIS 2.0 is that :

			* NRLMSISE-00 uses a “Flags” container to define the model’s specific settings every time we call the gtd7d(Input, Flags) method
			* NRLMSIS 2.0 doesn’t use the “Flags” container when calling the gtd7d(Input, Flags). Instead, the model is configured once in its constructor by providing a specific MSISInit instance.

	==== Solar and geomagnetic activity ====		==== Solar and geomagnetic activity ====
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	\|This class implements the MSIS00 atmospheric model.		\|This class implements the MSIS00 atmospheric model.
	\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSISE2000.html ...]		\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSISE2000.html ...]
			\|-
			\|NRLMSISE00
			\|This class implements the NRLMSISE 1.0 atmospheric model.
			\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSIS/NRLMSISE00.html ...]
			\|-
			\|NRLMSISE20
			\|This class implements the NRLMSISE 2.0 atmospheric model.
			\|[{{JavaDoc4.18}}/fr/cnes/sirius/patrius/forces/atmospheres/MSIS/NRLMSISE20.html ...]
	\|-		\|-
	\|'''US76'''		\|'''US76'''

Admin tsn : Page créée avec « == Introduction == === Scope === The scope of this section is to present the physical models available through the Patrius library. === Javadoc === All the classes related to physical models are in the `fr.cnes.sirius.patrius.forces` and `fr.cnes.sirius.patrius.math.parameter`packages. The classes related to reading potential files are in the package `fr.cnes.sirius.patrius.forces.gravity.potential`. {| class="wikitable" |- !... »

2026-06-10T08:41:43Z

Page créée avec « == Introduction == === Scope === The scope of this section is to present the physical models available through the Patrius library. === Javadoc === All the classes related to physical models are in the <code>fr.cnes.sirius.patrius.forces</code> and <code>fr.cnes.sirius.patrius.math.parameter</code>packages. The classes related to reading potential files are in the package <code>fr.cnes.sirius.patrius.forces.gravity.potential</code>. {| class="wikitable" |- !... »

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