itrf2005.core.apr
 contains ITRF2005 defined site coordinates and velocities at reference
 epch year 2000.0 in the format of
 site x y z xVel yVel zVel reference epoch (e.g.):
 ALBH_GPS -2341332.917 -3539049.517  4745791.357 -.0099 -.0011 -.0043 2000.0 from ITRF2005

itrf2005.apr.updated
 contains site coordinates and velocities of a given epoch estimated
 by SOPAC on a geocentric xyz system. the format is
 site x y z xVel yVel zVel refEpoch xSigma ySigma zSigma (e.g.):
 7ODM_GPS -2407751.0765 -4706536.5980 3557571.4534 -0.0251 0.0168 0.0070 2008.824 0.0049 0.0060 0.0045 0.00000 0.00000 0.00000 rm_flt