Package org.orekit.estimation.iod
Class IodLaplace
- java.lang.Object
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- org.orekit.estimation.iod.IodLaplace
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public class IodLaplace extends Object
Laplace angles-only Initial Orbit Determination (IOD) algorithm, assuming Keplerian motion.Laplace algorithm is one of the first method to determine orbits. An orbit is determined from three lines of sight w.r.t. their respective observers inertial positions vectors. For Laplace method, the observer is identical for all observations. Reference: Bate, R., Mueller, D. D., & White, J. E. (1971). Fundamentals of astrodynamics. New York: Dover Publications.
- Since:
- 10.1
- Author:
- Shiva Iyer
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Constructor Summary
Constructors Constructor Description IodLaplace(double mu)
Constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Orbit
estimate(Frame outputFrame, AngularAzEl azEl1, AngularAzEl azEl2, AngularAzEl azEl3)
Estimate the orbit from three angular observations at the same location.Orbit
estimate(Frame outputFrame, AngularRaDec raDec1, AngularRaDec raDec2, AngularRaDec raDec3)
Estimate the orbit from three angular observations at the same location.Orbit
estimate(Frame outputFrame, PVCoordinates obsPva, AbsoluteDate obsDate1, Vector3D los1, AbsoluteDate obsDate2, Vector3D los2, AbsoluteDate obsDate3, Vector3D los3)
Estimate orbit from three line of sight angles at the same location.
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Method Detail
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estimate
public Orbit estimate(Frame outputFrame, AngularAzEl azEl1, AngularAzEl azEl2, AngularAzEl azEl3)
Estimate the orbit from three angular observations at the same location.- Parameters:
outputFrame
- Observer coordinates at time of raDec2azEl1
- first angular observationazEl2
- second angular observationazEl3
- third angular observation- Returns:
- estimate of the orbit at the central date or null if no estimate is possible with the given data
- Since:
- 12.0
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estimate
public Orbit estimate(Frame outputFrame, AngularRaDec raDec1, AngularRaDec raDec2, AngularRaDec raDec3)
Estimate the orbit from three angular observations at the same location.- Parameters:
outputFrame
- Observer coordinates at time of raDec2raDec1
- first angular observationraDec2
- second angular observationraDec3
- third angular observation- Returns:
- estimate of the orbit at the central date or null if no estimate is possible with the given data
- Since:
- 11.0
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estimate
public Orbit estimate(Frame outputFrame, PVCoordinates obsPva, AbsoluteDate obsDate1, Vector3D los1, AbsoluteDate obsDate2, Vector3D los2, AbsoluteDate obsDate3, Vector3D los3)
Estimate orbit from three line of sight angles at the same location.- Parameters:
outputFrame
- inertial frame for observer coordinates and orbit estimateobsPva
- Observer coordinates at time obsDate2obsDate1
- date of observation 1los1
- line of sight unit vector 1obsDate2
- date of observation 2los2
- line of sight unit vector 2obsDate3
- date of observation 3los3
- line of sight unit vector 3- Returns:
- estimate of the orbit at the central date obsDate2 or null if no estimate is possible with the given data
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