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| + | === An orbital propagator === | ||
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<font color=#556B2F>'''PSIMU'''</font> is a [https://cnes.fr/fr '''CNES'''] tool allowing to propagate trajectories around the Earth. These trajectories may be: | <font color=#556B2F>'''PSIMU'''</font> is a [https://cnes.fr/fr '''CNES'''] tool allowing to propagate trajectories around the Earth. These trajectories may be: | ||
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* <font color=#FF0000>'''Hyperbolic'''</font> ones, | * <font color=#FF0000>'''Hyperbolic'''</font> ones, | ||
* <font color=#FF0000>'''Atmospheric'''</font> ones (in particular in case of debris reentries). | * <font color=#FF0000>'''Atmospheric'''</font> ones (in particular in case of debris reentries). | ||
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| + | === Three user modes === | ||
<font color=#556B2F>'''PSIMU'''</font> is usable via three modes: | <font color=#556B2F>'''PSIMU'''</font> is usable via three modes: | ||
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* Batch using a context file (in <font color=#FF8C00 title="Extensible Markup Language">XML</font> format), | * Batch using a context file (in <font color=#FF8C00 title="Extensible Markup Language">XML</font> format), | ||
* Library via its <font color=#FF8C00>Java</font> interface. | * Library via its <font color=#FF8C00>Java</font> interface. | ||
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| + | === Input data === | ||
Its initialization is made by: | Its initialization is made by: | ||
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:- Solar radiative pressure (direct or rediffused one) | :- Solar radiative pressure (direct or rediffused one) | ||
:- Oceanic and terrestrial tides | :- Oceanic and terrestrial tides | ||
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| + | === Output === | ||
<font color=#556B2F>'''PSIMU'''</font> also allows to set its output data within several tens of variables, the output frame and, of course, the output step. A graphical interface for plots is also integrated. | <font color=#556B2F>'''PSIMU'''</font> also allows to set its output data within several tens of variables, the output frame and, of course, the output step. A graphical interface for plots is also integrated. | ||
Version du 21 janvier 2020 à 15:09
An orbital propagator
PSIMU is a CNES tool allowing to propagate trajectories around the Earth. These trajectories may be:
- Elliptical ones (all kind of orbits, from LEO to GEO passing through MEO or HEO),
- Hyperbolic ones,
- Atmospheric ones (in particular in case of debris reentries).
Three user modes
PSIMU is usable via three modes:
- GUI: its utilization is made user-friendly thanks to a graphical user interface (developed using [GENIUS] and [GENOPUS]),
- Batch using a context file (in XML format),
- Library via its Java interface.
Input data
Its initialization is made by:
- The initial orbital parameters definition (epoch, frame, coordinates) with a great number of available options.
- The vehicle modelling:
- - Vehicle shapes (sphere, cylinder and parallelepiped) with or without solar panels,
- - Dimensions or surfaces,
- - Aerodynamic characteristics and/or radiative pressure ones,
- - Propulsive characteristics (engines, tanks).
- A maneuver sequence (optional) including impulsive maneuvers and/or continuous ones
- A sequence of attitude laws (optional) ; indeed, if PSIMU does not manage 6 DDL motion, it owns as input data, attitude laws depending on orbital events, allowing to know at every moment the vehicle attitude and thus, to deduce from it the forces applied to the vehicle.
- Numerical integrator parametrization (Runge Kutta or Dormand Price) with, for usual applications, by default settings.
- Choice of force models within:
- - Potential with several models available as the possibility to manage degree and order of zonal and tesseral terms,
- - Other bodies attraction : Moon and Sun via analytical or numerical ephemeris,
- - Atmospheric forces using different atmospheric models and their associated settings,
- - Solar radiative pressure (direct or rediffused one)
- - Oceanic and terrestrial tides
Output
PSIMU also allows to set its output data within several tens of variables, the output frame and, of course, the output step. A graphical interface for plots is also integrated.
