Slide 1Issues in GPS Error Analysis What are the sources of the errors ? How much of the error can we remove by better modeling ? Do we have enough information to infer the…

Slide 1 GAMIT Modeling Aspects Lecture 04 Thomas Herring [email protected] Slide 2 Challenges and Opportunities in GPS Measurements – “One-sided” geometry increases vertical…

CW signals: plans for S2 June 16-17 the group held a f2f meeting to discuss plans for analyses of S2 data (and beyond). Slides from the various presentations can be found…

12.540 Principles of the Global Positioning System Lecture 23 Prof. Thomas Herring Room 54-611; 253-5941 [email protected] http://geoweb.mit.edu/~tah/12.540 *12.540 Lec 23 OVERVIEW…

Contemporary Horizontal and Vertical Deformation of the Tien Shan Thomas Herring, Bradford H. Hager, Brendan Meade, Massachusetts Institute of Technology, Cambridge, MA USA,…

Contemporary Horizontal and Vertical Deformation of the Tien Shan Thomas Herring, Bradford H. Hager, Brendan Meade, Massachusetts Institute of Technology, Cambridge, MA USA,…

Issues in GPS Error Analysis What are the sources of the errors ? How much of the error can we remove by better modeling ? Do we have enough information to infer the uncertainties…

Challenges and Opportunities in GPS Vertical Measurements âOne-sidedâ geometry increases vertical uncertainties relative to horizontal (~3:1) so longer sessions are needed…

Epochs 1 2 3 4 5 Hours 20 0 mm -20 Elevation angle and phase residuals for single satellite Simple geometry for incidence of a direct and reflected signal Multipath contributions…

Challenges and Opportunities in GPS Vertical Measurements âOne-sidedâ geometry increases vertical uncertainties relative to horizontal (~3:1) so longer sessions are needed…