java.lang.Object
- org.orekit.files.sp3.SP3File.SP3Ephemeris

All Implemented Interfaces:

EphemerisFile.EphemerisSegment, EphemerisFile.SatelliteEphemeris

Enclosing class:

SP3File
```
public class SP3File.SP3Ephemeris
extends Object
implements EphemerisFile.SatelliteEphemeris, EphemerisFile.EphemerisSegment
```
An ephemeris for a single satellite in a SP3 file.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`double`	`getAccuracy()`	Get the formal accuracy for this satellite.
`CartesianDerivativesFilter`	`getAvailableDerivatives()`	Get which derivatives of position are available in this ephemeris segment.
`List<SP3File.SP3Coordinate>`	`getCoordinates()`	Get the coordinates for this ephemeris segment.
`Frame`	`getFrame()`	Get the reference frame for this ephemeris segment.
`String`	`getFrameCenterString()`	Get the name of the center of the coordinate system the ephemeris is provided in.
`String`	`getFrameString()`	Get the defining frame for this ephemeris segment.
`String`	`getId()`	Get the satellite ID.
`int`	`getInterpolationSamples()`	Get the number of samples to use in interpolation.
`double`	`getMu()`	Get the standard gravitational parameter for the satellite.
`BoundedPropagator`	`getPropagator()`	View this ephemeris as a propagator, combining data from all `segments`.
`List<SP3File.SP3Ephemeris>`	`getSegments()`	Returns a list containing only `this`.
`AbsoluteDate`	`getStart()`	Get the start date of the ephemeris.
`AbsoluteDate`	`getStop()`	Get the end date of the ephemeris.
`TimeScale`	`getTimeScale()`	Get the time scale for this ephemeris segment.
`String`	`getTimeScaleString()`	Get the time scale for this ephemeris segment.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - getId
```
public String getId()
```
    Description copied from interface: EphemerisFile.SatelliteEphemeris
    
    Get the satellite ID. The satellite ID is unique only within the same ephemeris file.
    
    Specified by:
    
    getId in interface EphemerisFile.SatelliteEphemeris
    
    Returns:
    
    the satellite's ID, never null.
  - getMu
```
public double getMu()
```
    Description copied from interface: EphemerisFile.SatelliteEphemeris
    
    Get the standard gravitational parameter for the satellite.
    
    Specified by:
    
    getMu in interface EphemerisFile.EphemerisSegment
    
    Specified by:
    
    getMu in interface EphemerisFile.SatelliteEphemeris
    
    Returns:
    
    the gravitational parameter use in EphemerisFile.SatelliteEphemeris.getPropagator(), in m^3 / s^2.
  - getFrameCenterString
```
public String getFrameCenterString()
```
    Description copied from interface: EphemerisFile.EphemerisSegment
    
    Get the name of the center of the coordinate system the ephemeris is provided in. This may be a natural origin, such as the center of the Earth, another satellite, etc.
    
    Specified by:
    
    getFrameCenterString in interface EphemerisFile.EphemerisSegment
    
    Returns:
    
    the name of the frame center
  - getFrameString
```
public String getFrameString()
```
    Description copied from interface: EphemerisFile.EphemerisSegment
    
    Get the defining frame for this ephemeris segment.
    
    Specified by:
    
    getFrameString in interface EphemerisFile.EphemerisSegment
    
    Returns:
    
    the frame identifier, as specified in the ephemeris file, or null if the ephemeris file does not specify a frame.
  - getFrame
```
public Frame getFrame()
```
    Description copied from interface: EphemerisFile.EphemerisSegment
    
    Get the reference frame for this ephemeris segment.
    
    Specified by:
    
    getFrame in interface EphemerisFile.EphemerisSegment
    
    Returns:
    
    the reference frame for this segment. Never null.
  - getTimeScaleString
```
public String getTimeScaleString()
```
    Description copied from interface: EphemerisFile.EphemerisSegment
    
    Get the time scale for this ephemeris segment.
    
    Specified by:
    
    getTimeScaleString in interface EphemerisFile.EphemerisSegment
    
    Returns:
    
    the time scale identifier, as specified in the ephemeris file, or null if the ephemeris file does not specify a time scale.
  - getTimeScale
```
public TimeScale getTimeScale()
```
    Description copied from interface: EphemerisFile.EphemerisSegment
    
    Get the time scale for this ephemeris segment.
    
    Specified by:
    
    getTimeScale in interface EphemerisFile.EphemerisSegment
    
    Returns:
    
    the time scale for this segment. Never null.
  - getInterpolationSamples
```
public int getInterpolationSamples()
```
    Description copied from interface: EphemerisFile.EphemerisSegment
    
    Get the number of samples to use in interpolation.
    
    Specified by:
    
    getInterpolationSamples in interface EphemerisFile.EphemerisSegment
    
    Returns:
    
    the number of points to use for interpolation.
  - getAvailableDerivatives
```
public CartesianDerivativesFilter getAvailableDerivatives()
```
    Description copied from interface: EphemerisFile.EphemerisSegment
    
    Get which derivatives of position are available in this ephemeris segment.
    While EphemerisFile.EphemerisSegment.getCoordinates() always returns position, velocity, and acceleration the return value from this method indicates which of those are in the ephemeris file and are actually valid.
    
    Specified by:
    
    getAvailableDerivatives in interface EphemerisFile.EphemerisSegment
    
    Returns:
    
    a value indicating if the file contains velocity and/or acceleration data.
  - getCoordinates
```
public List<SP3File.SP3Coordinate> getCoordinates()
```
    Description copied from interface: EphemerisFile.EphemerisSegment
    
    Get the coordinates for this ephemeris segment.
    
    Specified by:
    
    getCoordinates in interface EphemerisFile.EphemerisSegment
    
    Returns:
    
    a list of state vectors in chronological order. The coordinates are not necessarily evenly spaced in time. The value of EphemerisFile.EphemerisSegment.getAvailableDerivatives() indicates if the velocity or accelerations were specified in the file. Any position, velocity, or acceleration coordinates that are not specified in the ephemeris file are zero in the returned values.
  - getSegments
```
public List<SP3File.SP3Ephemeris> getSegments()
```
    Returns a list containing only this.
    
    Specified by:
    
    getSegments in interface EphemerisFile.SatelliteEphemeris
    
    Returns:
    
    the segments contained in the ephemeris file for this satellite.
  - getStart
```
public AbsoluteDate getStart()
```
    Description copied from interface: EphemerisFile.SatelliteEphemeris
    
    Get the start date of the ephemeris.
    The date returned by this method is equivalent to getPropagator().getMinDate().
    
    Specified by:
    
    getStart in interface EphemerisFile.EphemerisSegment
    
    Specified by:
    
    getStart in interface EphemerisFile.SatelliteEphemeris
    
    Returns:
    
    ephemeris start date.
  - getStop
```
public AbsoluteDate getStop()
```
    Description copied from interface: EphemerisFile.SatelliteEphemeris
    
    Get the end date of the ephemeris.
    The date returned by this method is equivalent to getPropagator().getMaxDate().
    
    Specified by:
    
    getStop in interface EphemerisFile.EphemerisSegment
    
    Specified by:
    
    getStop in interface EphemerisFile.SatelliteEphemeris
    
    Returns:
    
    ephemeris end date.
  - getPropagator
```
public BoundedPropagator getPropagator()
```
    Description copied from interface: EphemerisFile.SatelliteEphemeris
    
    View this ephemeris as a propagator, combining data from all segments.
    In order to view the ephemeris for this satellite as a Propagator several conditions must be met. An Orekit Frame and TimeScale must be constructable from the frame and time scale specification in the ephemeris file. This condition is met when EphemerisFile.EphemerisSegment.getFrame() and EphemerisFile.EphemerisSegment.getTimeScale() return normally for all segments. If there are multiple segments they must be adjacent such that there are no duplicates or gaps in the ephemeris. The definition of adjacent depends on the ephemeris format as some formats define usable start and stop times that are different from the ephemeris data start and stop times. If these conditions are not met an OrekitException may be thrown by this method or by one of the methods of the returned Propagator.
    Each call to this method creates a new propagator.
    
    Specified by:
    
    getPropagator in interface EphemerisFile.EphemerisSegment
    
    Specified by:
    
    getPropagator in interface EphemerisFile.SatelliteEphemeris
    
    Returns:
    
    a propagator for all the data in this ephemeris file.
  - getAccuracy
```
public double getAccuracy()
```
    Get the formal accuracy for this satellite.
    The accuracy is limited by the SP3 standard to be a power of 2 in mm. The value returned here is in meters.
    
    Returns:
    
    magnitude of one standard deviation, in m.

Class SP3File.SP3Ephemeris

Method Summary

Methods inherited from class java.lang.Object

Method Detail

getId

getMu

getFrameCenterString

getFrameString

getFrame

getTimeScaleString

getTimeScale

getInterpolationSamples

getAvailableDerivatives

getCoordinates

getSegments

getStart

getStop

getPropagator

getAccuracy