Satellite (predict4java 1.3 API)

All Known Implementing Classes:

AbstractSatellite, DeepSpaceSatellite, LEOSatellite
```
public interface Satellite
```

Field Summary

Fields
Modifier and Type	Field and Description
`static double`	`CK2`
`static double`	`DEG2RAD`
`static double`	`EARTH_RADIUS_KM`
`static double`	`EPSILON`
`static double`	`J2_HARMONIC` J2 Harmonic (WGS '72).
`static double`	`J3_HARMONIC` J3 Harmonic (WGS '72).
`static double`	`J4_HARMONIC` J4 Harmonic (WGS '72).
`static double`	`TWO_PI`
`static double`	`TWO_THIRDS`
`static double`	`XKE`

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`SatPos`	`calculateSatelliteGroundTrack()` Calculates the ground track (sub satellite point) of the satellite, for the already determined position of the satellite.
`void`	`calculateSatelliteVectors(Date time)` Calculates the position and velocity vectors of the satellite.
`SatPos`	`calculateSatPosForGroundStation(GroundStationPosition gsPos)` Calculates the position of the satellite from the perspective of a ground station.
`SatPos`	`getPosition(GroundStationPosition qth, Date time)` Get the position of the satellite.
`TLE`	`getTLE()` Returns the currently assigned TLE for the satellite.
`boolean`	`willBeSeen(GroundStationPosition qth)` This function returns true if the satellite can ever rise above the horizon of the ground station.

- Field Detail
  - DEG2RAD
```
static final double DEG2RAD
```
    See Also:
    
    Constant Field Values
  - TWO_PI
```
static final double TWO_PI
```
    See Also:
    
    Constant Field Values
  - EPSILON
```
static final double EPSILON
```
    See Also:
    
    Constant Field Values
  - TWO_THIRDS
```
static final double TWO_THIRDS
```
    See Also:
    
    Constant Field Values
  - EARTH_RADIUS_KM
```
static final double EARTH_RADIUS_KM
```
    See Also:
    
    Constant Field Values
  - XKE
```
static final double XKE
```
    See Also:
    
    Constant Field Values
  - CK2
```
static final double CK2
```
    See Also:
    
    Constant Field Values
  - J2_HARMONIC
```
static final double J2_HARMONIC
```
    J2 Harmonic (WGS '72).
    
    See Also:
    
    Constant Field Values
  - J3_HARMONIC
```
static final double J3_HARMONIC
```
    J3 Harmonic (WGS '72).
    
    See Also:
    
    Constant Field Values
  - J4_HARMONIC
```
static final double J4_HARMONIC
```
    J4 Harmonic (WGS '72).
    
    See Also:
    
    Constant Field Values
- Method Detail
  - willBeSeen
```
boolean willBeSeen(GroundStationPosition qth)
```
    This function returns true if the satellite can ever rise above the horizon of the ground station.
    
    Parameters:
    
    qth - the ground station position
    
    Returns:
    
    boolean whether or not the satellite will be seen
  - calculateSatelliteVectors
```
void calculateSatelliteVectors(Date time)
```
    Calculates the position and velocity vectors of the satellite. When observations for many ground stations have to be made for one satellite, this method can be used together with the calculateSatPosForGroundStation(..) method. This gives a performance improvement relative to using the all-in-one method getPosition(..).
    
    Parameters:
    
    date - The date for the calculation the position and velocity vectors of the satellite.
  - calculateSatelliteGroundTrack
```
SatPos calculateSatelliteGroundTrack()
```
    Calculates the ground track (sub satellite point) of the satellite, for the already determined position of the satellite.
    
    Returns:
    
    satPos The SatPos object in which the ground track of the satellite is stored.
  - calculateSatPosForGroundStation
```
SatPos calculateSatPosForGroundStation(GroundStationPosition gsPos)
```
    Calculates the position of the satellite from the perspective of a ground station. The position and velocity of the satellite must have been determined before (by calculateSatelliteVectors(..)). The ground track (sub satellite point) is not calculated, this should be done by calculateSatelliteGroundTrack(..).
    
    Parameters:
    
    gsPos - The position of the ground station to perform the calculations for.
    
    Returns:
    
    satPos The SatPos object where the position of the satellite is stored, as seen from a ground station.
  - getTLE
```
TLE getTLE()
```
    Returns the currently assigned TLE for the satellite.
    
    Returns:
  - getPosition
```
SatPos getPosition(GroundStationPosition qth,
                   Date time)
```
    Get the position of the satellite.
    
    Parameters:
    
    gsPos - the ground station position
    
    satPos - the position of the satellite
    
    date - the date

Interface Satellite

Field Summary

Method Summary

Field Detail

DEG2RAD

TWO_PI

EPSILON

TWO_THIRDS

EARTH_RADIUS_KM

XKE

CK2

J2_HARMONIC

J3_HARMONIC

J4_HARMONIC

Method Detail

willBeSeen

calculateSatelliteVectors

calculateSatelliteGroundTrack

calculateSatPosForGroundStation

getTLE

getPosition