Path: Interplanetary/InterplanetaryOrbit
% Find the best departure date for TrajectoryBetweenTwoPlanets
This will scan for one orbit of the departure planet (one of it's years)
and find date with the best geometry given the desired duration. This
version using Lambert is more suitable for planets that are close
together, for example Earth and Mars. It uses the planetary almanac.
For the struct form of planet2, this will calculate updated orbital
elements for the new epoch using the gravitational parameter of the sun.
--------------------------------------------------------------------------
Form:
[jD,planet2] = FindDepartureLambert( jD0, planet1, planet2, years, doPlot )
--------------------------------------------------------------------------
------
Inputs
------
jD0 (1,1) Start Julian Date
planet1 (1,1) Id of departure planet (1-9)
planet2 (1,1) Id of arrival planet (1-9) or data structure
.name (1,:) Name
.el (1,6) Orbital elements - epoch must be jD0
years (1,1) Mission duration (years)
doPlot (1,1) Create a plot
-------
Outputs
-------
jD (1,1) Updated Julian Date
planet2 (.) If planet2 is a structure, updated elements
.name (1,:) Name
.el (1,6) Orbital elements - new epoch of jD
dV (1,:) Delta-Vs (km/s)
jDs (1,:) Departure dates
--------------------------------------------------------------------------
See also PlanetTransferLambert
--------------------------------------------------------------------------
Interplanetary: InterplanetaryOrbit/PlanetTransferLambert Interplanetary: Mechanics/SynodicPlanets Orbit: OrbitMechanics/SynodicFromSemimajorAxes SC: Ephem/Planets SC: Ephem/SolarSystemElements Common: Database/Constant Common: Graphics/TimeHistory Common: Time/Date2JD Common: Time/JDToDateString
Back to the Interplanetary Module page