Retracement Inc.

I spent the last couple of days testing some static GPS occupations that were tied together with terrestrial measurements (direction sets for horizontal, precise trig leveling for vertical). The point of it all was to compare results from OPUS-RS with results from static post-processing base station data from our own Washington State Reference Network. I had 5 OPUS-RS positions tied to 4 WSRN-derived positions, all roughly an hour of occupation. When you tie it all together in Star*Net the WSRN positions have roughly half the error ellipse of the OPUS-RS positions. The truer test will be when I compare the recent occupations directly, having sent the RINEX files to OPUS-RS as well as having processed them against WSRN base station data with Topcon Tools.  Will post that soon.