gnsstk::Xvt Class Reference

Detailed Description

Earth-Centered, Earth-Fixed Cartesian position, velocity, clock bias and drift

Definition at line 60 of file Xvt.hpp.

#include <Xvt.hpp>

Public Types
enum	HealthStatus {   MinValue, Uninitialized = MinValue, Unavailable, Unused,   Unknown, Unhealthy, Degraded, Healthy,   MaxValue = Healthy }

Public Member Functions
virtual double	computeRelativityCorrection (void)
double	getClockBias () noexcept
	access the clock bias, in second More...
double	getClockDrift () noexcept
	access the clock drift, in second/second More...
Triple	getPos () noexcept
	access the position, ECEF Cartesian in meters More...
double	getRelativityCorr () noexcept
	access the relativity correction, in seconds More...
Triple	getVel () noexcept
	access the velocity in m/s More...
double	preciseRho (const Triple &rxPos, const EllipsoidModel &ellipsoid, double correction=0) const noexcept
	Xvt ()
	Default constructor. More...
virtual	~Xvt ()
	Destructor. More...

Public Attributes
double	clkbias
	Sat clock correction in seconds. More...
double	clkdrift
	satellite clock drift in seconds/second More...
RefFrame	frame
	reference frame of this data More...
HealthStatus	health
	Health status of satellite at ref time. More...
double	relcorr
	relativity correction (standard 2R.V/c^2 term), seconds More...
Triple	v
	satellite velocity in ECEF Cartesian, meters/second More...
Triple	x
	Sat position ECEF Cartesian (X,Y,Z) meters. More...

Member Enumeration Documentation

HealthStatus

enum gnsstk::Xvt::HealthStatus

Health of satellite at the time of the PVT computation. A more detailed explanation of each enumeration is as follows:

• Uninitialized - This is used to indicate that the health status has never been properly set. This generally indicates a coding error in the library.
• Unavailable - This is used to indicate that orbit (or health, in the case of getSVHealth calls) information is not available for the satellite at the time of interest.
• Unused - This indicates that the XvtStore class or other class generating this Xvt or health status does not actually contain or provide health information. An example of this is the SP3EphemerisStore.
• Unknown - This is used to indicate that the store was able to provide a PVT, but for whatever reason was not able to determine the health state of the satellite.
• Unhealthy - This indicates that the satellite is known to be in an unhealthy state at the time of interest.
• Degraded - This indicates that the satellite is known to be in a degraded state at the time of interest (currently only Galileo supports such a state).
• Healthy - This indicates that the satellite is known to be in a healthy state.

Enumerator
MinValue
Uninitialized	Health status has not been set.
Unavailable	Orbit information was not available, PVT invalid.
Unused	Sat health is not used in computing this PVT.
Unknown	Health state is unknown.
Unhealthy	Sat is marked unhealthy, do not use PVT.
Degraded	Sat is in a degraded state, recommend do not use.
Healthy	Satellite is healthy, PVT valid.
MaxValue

Definition at line 87 of file Xvt.hpp.

Constructor & Destructor Documentation

Xvt()

gnsstk::Xvt::Xvt ( )

inline

Default constructor.

Definition at line 101 of file Xvt.hpp.

~Xvt()

virtual gnsstk::Xvt::~Xvt ( )

inlinevirtual

Destructor.

Definition at line 108 of file Xvt.hpp.

Member Function Documentation

computeRelativityCorrection()

double gnsstk::Xvt::computeRelativityCorrection ( void  )

virtual

Compute and return the relativity correction (-2R dot V/c^2) in seconds.

Note

-2*dot(R,V)/(c*c) = -4.4428e-10(s/sqrt(m)) * ecc * sqrt(A(m)) * sinE

Definition at line 98 of file Xvt.cpp.

getClockBias()

double gnsstk::Xvt::getClockBias ( )

inlinenoexcept

access the clock bias, in second

Definition at line 120 of file Xvt.hpp.

getClockDrift()

double gnsstk::Xvt::getClockDrift ( )

inlinenoexcept

access the clock drift, in second/second

Definition at line 124 of file Xvt.hpp.

getPos()

Triple gnsstk::Xvt::getPos ( )

inlinenoexcept

access the position, ECEF Cartesian in meters

Definition at line 112 of file Xvt.hpp.

getRelativityCorr()

double gnsstk::Xvt::getRelativityCorr ( )

inlinenoexcept

access the relativity correction, in seconds

Definition at line 128 of file Xvt.hpp.

getVel()

Triple gnsstk::Xvt::getVel ( )

inlinenoexcept

access the velocity in m/s

Definition at line 116 of file Xvt.hpp.

preciseRho()

double gnsstk::Xvt::preciseRho ( const Triple &  rxPos, const EllipsoidModel &  ellipsoid, double  correction = 0  ) const

noexcept

Given the position of a ground location, compute the range to the spacecraft position.

Parameters

[in]	rxPos	ground position at broadcast time in ECEF.
[in]	ellipsoid	geodetic parameters.
[in]	correction	offset in meters (include any factors other than the SV clock correction and the relativity correction).

Returns

Range in meters

Definition at line 113 of file Xvt.cpp.

Member Data Documentation

clkbias

double gnsstk::Xvt::clkbias

Sat clock correction in seconds.

Definition at line 153 of file Xvt.hpp.

clkdrift

double gnsstk::Xvt::clkdrift

satellite clock drift in seconds/second

Definition at line 154 of file Xvt.hpp.

frame

RefFrame gnsstk::Xvt::frame

reference frame of this data

Definition at line 156 of file Xvt.hpp.

health

HealthStatus gnsstk::Xvt::health

Health status of satellite at ref time.

Definition at line 157 of file Xvt.hpp.

relcorr

double gnsstk::Xvt::relcorr

relativity correction (standard 2R.V/c^2 term), seconds

Definition at line 155 of file Xvt.hpp.

v

Triple gnsstk::Xvt::v

satellite velocity in ECEF Cartesian, meters/second

Definition at line 152 of file Xvt.hpp.

x

Triple gnsstk::Xvt::x

Sat position ECEF Cartesian (X,Y,Z) meters.

Definition at line 151 of file Xvt.hpp.

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The documentation for this class was generated from the following files:

• Xvt.hpp
• Xvt.cpp