Package com.irurueta.navigation.gnss

Class SatelliteECEFPositionAndVelocityGenerator

java.lang.Object

com.irurueta.navigation.gnss.SatelliteECEFPositionAndVelocityGenerator

public class SatelliteECEFPositionAndVelocityGenerator
extends Object

Computes satellites positions and velocities. This implementation is based on the equations defined in "Principles of GNSS, Inertial, and Multi-sensor Integrated Navigation Systems, Second Edition" and on the companion software available at: https://github.com/ymjdz/MATLAB-Codes/blob/master/Satellite_positions_and_velocities.m

Field Summary

Fields

Modifier and Type	Field	Description
static final double	EARTH_GRAVITATIONAL_CONSTANT	WGS84 Earth gravitational constant expressed in m^3 * s^-2
static final double	EARTH_ROTATION_RATE	Earth rotation rate expressed in radians per second (rad/s).

Constructor Summary

Constructors

Modifier	Constructor	Description
private	SatelliteECEFPositionAndVelocityGenerator()	Constructor.

Method Summary

Modifier and Type	Method	Description
static ECEFPositionAndVelocity	generateSatellitePositionAndVelocity(double time, GNSSConfig config, int j)	Generates position and velocity of a single satellite based on provided configuration.
static void	generateSatellitePositionAndVelocity(double time, GNSSConfig config, int j, ECEFPositionAndVelocity result)	Generates position and velocity of a single satellite based on provided configuration.
static Collection<ECEFPositionAndVelocity>	generateSatellitesPositionAndVelocity(double time, GNSSConfig config)	Generates positions and velocities of satellites based on provided configuration.
static void	generateSatellitesPositionAndVelocity(double time, GNSSConfig config, Collection<ECEFPositionAndVelocity> result)	Generates positions and velocities of satellites based on provided configuration.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

EARTH_GRAVITATIONAL_CONSTANT

public static final double EARTH_GRAVITATIONAL_CONSTANT

WGS84 Earth gravitational constant expressed in m^3 * s^-2

See Also:

• Constant Field Values

EARTH_ROTATION_RATE

public static final double EARTH_ROTATION_RATE

Earth rotation rate expressed in radians per second (rad/s).

See Also:

• Constant Field Values

Constructor Details

SatelliteECEFPositionAndVelocityGenerator

private SatelliteECEFPositionAndVelocityGenerator()

Constructor. Prevents instantiation of utility class.

Method Details

generateSatellitesPositionAndVelocity

public static Collection<ECEFPositionAndVelocity> generateSatellitesPositionAndVelocity(double time,
 GNSSConfig config)

Generates positions and velocities of satellites based on provided configuration.

Parameters:

time - current time expressed in seconds (s).

config - GNSS configuration.

Returns:

collection containing position and velocities of satellites.

generateSatellitesPositionAndVelocity

public static void generateSatellitesPositionAndVelocity(double time,
 GNSSConfig config,
 Collection<ECEFPositionAndVelocity> result)

Generates positions and velocities of satellites based on provided configuration.

Parameters:

time - current time expressed in seconds (s).

config - GNSS configuration.

result - instance where computed positions and velocities of satellites will be stored.

generateSatellitePositionAndVelocity

public static ECEFPositionAndVelocity generateSatellitePositionAndVelocity(double time,
 GNSSConfig config,
 int j)

Generates position and velocity of a single satellite based on provided configuration.

Parameters:

time - current time expressed in seconds (s).

config - GNSS configuration.

j - number of satellite whose position and velocity must be computed.

Returns:

computed satellite position and velocity.

generateSatellitePositionAndVelocity

public static void generateSatellitePositionAndVelocity(double time,
 GNSSConfig config,
 int j,
 ECEFPositionAndVelocity result)

Generates position and velocity of a single satellite based on provided configuration.

Parameters:

time - current time expressed in seconds (s).

config - GNSS configuration.

j - number of satellite whose position and velocity must be computed.

result - instance where computed satellite position and velocity will be stored.