Santa Ana River – EDM Santa Ana River – EDM BaselineBaseline

OCRTN – RTK Field TestOCRTN – RTK Field Test

February 2006February 2006

Objective:Objective:

• To measure the horizontal distance and To measure the horizontal distance and vertical difference between 4 stable vertical difference between 4 stable monumentsmonuments

• To position monuments from 4 different To position monuments from 4 different Base Stations with different baseline lengthsBase Stations with different baseline lengths

• Compare RTK measurements to record Compare RTK measurements to record measurementsmeasurements

Project LocationProject Location

OEOCOEOC WHYTWHYT13km/8 miles13km/8 miles 27km/17 27km/17

milesmiles

SCMSSCMS CAT2CAT246km/29 miles46km/29 miles 72km/45 miles 72km/45 miles

ProjectProjectLocationLocation

RTK ProceduresRTK Procedures

• 2 Independent occupations on each station2 Independent occupations on each station

– Each independent occupation consists of two Each independent occupation consists of two 50 epoch measurements (about 1 minute)50 epoch measurements (about 1 minute)

– Independent occupations occur on different Independent occupations occur on different days and different times of the day (+/- 3 days and different times of the day (+/- 3 hours)hours)

Equipment Used:Equipment Used:

• One Voodoo StickOne Voodoo Stick– Leica SR530 Leica SR530

receiverreceiver– Leica AT502 Leica AT502

antennaantenna– CDMA Airlink CDMA Airlink

modemmodem– Fixed 2 meter pole Fixed 2 meter pole

w/ 8’ bubblew/ 8’ bubble

# of Independent # of Independent OccupationsOccupations• Compare coordinates computed for each station and Compare coordinates computed for each station and

from each base station to the RTK average coordinate: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)Station OEOC(8.2 mi) WHYT(16.6 mi) SCMS(28.7 mi) CAT2(44.7 mi)AA 2 2 22 2 2 2 2 B B 2 2 22 1* 1* 1* 1* CC 2 2 22 1* 1* 1^ 1^ DD 2 2 22 1* 1* 2 2

Wait at least 3 minutes to achieve fix Wait at least 3 minutes to achieve fix

*= could not achieve fix on day 1 *= could not achieve fix on day 1 ^ = could not achieve fix on day 2 ^ = could not achieve fix on day 2

Relative - Test Results:Relative - Test Results:

• Compare Historic (record) horizontal distance and Compare Historic (record) horizontal distance and vertical difference to RTK coordinate differences vertical difference to RTK coordinate differences for stations:for stations:

Pt to PtPt to Pt Record Horiz Dist (ft)Record Horiz Dist (ft) Record Vert Diff (ft)Record Vert Diff (ft)

A to B A to B 371.967’371.967’ +0.977+0.977

B to C B to C 2702.579’2702.579’ +8.324+8.324

C to D C to D 2769.172’2769.172’ +10.895+10.895

SAR-EDM Baseline SurveyRTK minus Record Horizontal Distance

0.00 0.00

-0.03

0.01

-0.02

0.010.02

-0.02

-0.05

0.01

-0.01-0.02

-0.10

-0.08

-0.06

-0.04

-0.02

0.00

0.02

0.04

0.06

0.08

0.10

A to B (371.97') B to C (2702.58') C to D (2769.17')

Baselines

Dif

fere

nc

e (

ft)

OEOC (8.2 mi) WHYT (16.6 mi) SCMS (28.7 mi) CAT2 (44.7 mi)

SCMS single occupation on C and D

SAR-EDM Baseline SurveyRTK minus Record - Veretical Differences

0.06

-0.03

0.040.03

-0.05-0.02

-0.06

0.19

-0.12-0.08

0.19

-0.11

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

A to B (+0.98') B to C (+8.32') C to D (+10.90')

Baselines

Dif

fere

nc

e (

ft)

OEOC (8.2 m) WHYT (16.6 m) SCMS (28.7 m) CAT2 (44.7 m)

SCMS and CAT2