Difference between realizations z RMS Difference 1.3 mm/yr Set by systematic 1. 3 mm/yr E 0.7 mm/yr N If removed 0.1mm/ RMS 12540Lec23 Local frame realization Another method for frame realization is the use of local stations(1200x 1800 km region) in forming velocity solution The frame is then found by rotation/translation to best match the Eurasia only realization In this method, effects of global scale systematic errors should be reduced RMS difference of velocities is 0.4 mm/yr(vx2/f0.2) and only slightly changed by estimating rotation/translation between fields05/12/03 12.540 Lec 23 15 Zoom RMS Difference 1.3 mm/yr systematic -1.3 mm/yr E -0.7 mm/yr N If removed 0.1 mm/yr RMS Difference between Realizations Set by 05/12/03 12.540 Lec 23 16 • Another method for frame realization is the use of velocity solution. • The frame is then found by rotation/translation to best match the Eurasia only realization • In this method, effects of global scale systematic errors should be reduced. • RMS difference of velocities is 0.4 mm/yr (√c2/f 0.2) and only slightly changed by estimating rotation/translation between fields. Local Frame realization local stations (1200x1800 km region) in forming 8