Relative Motion between St. Croix and the Puerto Rico-Northern Virgin Islands Block Derived from Continuous GPS Observations (1995–2014)

Table 1

Fourteen Parameters for the Helmert reference frame transformation from IGS08 to SPRNVIRF.

Parameter	Unit	IGS08 to SPRNVIRF
		)	m	0.0
()	m	0.0
()	m	0.0
()	Radian	0.0
()	Radian	0.0
()	Radian	0.0
()	Unitless	0.0
	m/year
	m/year
	m/year
	Radian/year
	Radian/year
	Radian/year
	1/year	0.0

Counterclockwise rotations of axes (, , and ) are positive.