1. Santa Ana River – EDM Baseline OCRTN – RTK Field Test February 2006

2. Objective: To measure the horizontal distance and vertical difference between 4 stable monuments To measure the horizontal distance and vertical difference between 4 stable monuments To position monuments from 4 different Base Stations with different baseline lengths To position monuments from 4 different Base Stations with different baseline lengths Compare RTK measurements to record measurements Compare RTK measurements to record measurements

3. Project Location

4. OEOC WHYT 13km/8 miles 27km/17 miles

5. SCMS CAT2 46km/29 miles 72km/45 miles

6. Project Location

7. RTK Procedures 2 Independent occupations on each station 2 Independent occupations on each station –Each independent occupation consists of two 50 epoch measurements (about 1 minute) –Independent occupations occur on different days and different times of the day (+/- 3 hours)

8. Equipment Used: One Voodoo Stick One Voodoo Stick –Leica SR530 receiver –Leica AT502 antenna –CDMA Airlink modem –Fixed 2 meter pole w/ 8’ bubble

9. # of Independent Occupations Compare coordinates computed for each station and from each base station to the RTK average coordinate: Compare coordinates computed for each station and from each base station to the RTK average coordinate: Station OEOC(8.2 mi) WHYT(16.6 mi) SCMS(28.7 mi) CAT2(44.7 mi) A 2 2 2 2 B 2 2 1* 1* C 2 2 1* 1^ D 2 2 1* 2 Wait at least 3 minutes to achieve fix *= could not achieve fix on day 1 ^ = could not achieve fix on day 2

10. Relative - Test Results: Compare Historic (record) horizontal distance and vertical difference to RTK coordinate differences for stations: Compare Historic (record) horizontal distance and vertical difference to RTK coordinate differences for stations: Pt to PtRecord Horiz Dist (ft)Record Vert Diff (ft) A to B 371.967’+0.977 B to C 2702.579’+8.324 C to D 2769.172’+10.895

11. SCMS single occupation on C and D

12. SCMS and CAT2