org.ka2ddo.gps

Class SatelliteState

java.lang.Object

org.ka2ddo.gps.SatelliteState

public class SatelliteState
extends java.lang.Object

This class contains all the known information for one GNSS satellite.

Author:

Andrew Pavlin, KA2DDO

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SatelliteState.GnssId ID codes for constellations of GNSS as used by gpsd (as derived from u-blox usage).

Field Summary

Fields

Modifier and Type	Field and Description
int	azimuth Horizontal orientation to this satellite relative to the current surface position and True North.
int	elevation Elevation above the horizon for this satellite relative to the current surface position.
SatelliteState.GnssId	gnssid GNSS constellation ID for this satellite.
boolean	inUseByRcvr Boolean true if this satellite is currently being used for position calculation.
int	prn Pseudo-random number identifying this satellite.
int	snr Signal-to-noise ratio code for current reception of this satellite.
int	svid Satellite vehicle ID number within a GNSS constellation.

Constructor Summary

Constructors

Constructor and Description
SatelliteState(int prn) Create a SatelliteState record for a particular satellite.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj) Indicates whether some other object is "equal to" this one.
int	hashCode() Returns a hash code value for the object.
java.lang.String	toString() Returns a string representation of the object.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

prn

public final int prn

Pseudo-random number identifying this satellite. This was the Satellite Vehicle number when there was only US DoD GPS; now it is a random code inferred by GPS receivers when combining multiple GNSS constellations.

svid

public int svid

Satellite vehicle ID number within a GNSS constellation.

gnssid

public SatelliteState.GnssId gnssid

GNSS constellation ID for this satellite. Assumed US DoD GPS unless told otherwise (for backwards compatibility with ancient GPS receivers).

inUseByRcvr

public boolean inUseByRcvr

Boolean true if this satellite is currently being used for position calculation.

elevation

public int elevation

Elevation above the horizon for this satellite relative to the current surface position.

azimuth

public int azimuth

Horizontal orientation to this satellite relative to the current surface position and True North.

snr

public int snr

Signal-to-noise ratio code for current reception of this satellite.

Constructor Detail

SatelliteState

public SatelliteState(int prn)

Create a SatelliteState record for a particular satellite.

Parameters:

prn - Satellite Vehicle number

Method Detail

hashCode

public int hashCode()

Returns a hash code value for the object.

Overrides:

hashCode in class java.lang.Object

Returns:

a hash code value for this object.

equals

public boolean equals(java.lang.Object obj)

Indicates whether some other object is "equal to" this one.

Overrides:

equals in class java.lang.Object

Parameters:

obj - the reference object with which to compare.

Returns:

true if this object is the same as the obj argument; false otherwise.

toString

public java.lang.String toString()

Returns a string representation of the object.

Overrides:

toString in class java.lang.Object

Returns:

a string representation of the object.