WESTERN REGION HEIGHT MOD WEBINAR

NOVEMBER 19, 2013

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2013

TO PROVIDE REAL-TIME, SUB 2 CM-

HORIZONTAL AND VERTICAL

POSITIONING STATEWIDE

TWO RELIABLE, INDEPENDENT NETWORKS ARE NECESSARY TO MAKE THIS ACCURACY POSSIBLE.

THE PASSIVE NETWORK IS THE GEODETIC CONTROL MONUMENTS AND THE ACTIVE

NETWORK IS WISCORS

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50% OF ALL WISCONSIN’S ORIGINAL GEODETIC CONTROL STATIONS WERE DESTROYED BY THE LATE 1980S WISDOT WAS THE RECIPIENT OF A FEDERAL GRANT TO RESTORE GEODETIC CONTROL OVER 8,000 GEODETIC CONTROL STATIONS HAVE BEEN CONSTRUCTED THROUGHOUT THE STATE AN IMPORTANT COMPONENT OF WI-HMP IS PRESERVING THESE CONTROL STATIONS

WESTERN REGION HEIGHT MOD WEBINAR 2013

WESTERN REGION HEIGHT MOD WEBINAR 2013

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A GNSS ANTENNA AND RECEIVER ARE

USED TO COLLECT DATA

FROM TWO SATELLITE

CONSTELLATIONS

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FROM THE ORIGINAL 80 HARN MONUMENTS, THE PRIMARY BASE STATIONS WERE

OBSERVED

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THE SECONDARY STATIONS WERE ESTABLISHED FROM THE PRIMARY GPS

SURVEY

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THEN WE DENSIFY FURTHER WITH LOCAL GPS STATIONS

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DIFFERENTIAL LEVELING

OBSERVATIONS ARE PERFORMED

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LEVEL LINES USE NEW BENCH MARKS, GPS STATIONS, AND HISTORICAL MARKS BENCHMARKS APPROXIMATELY 3 Km APART SURVEYED TO SECOND ORDER, CLASS I

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COMBINATION OF NEW AND EXISITING VERTICAL CONTROL

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LEVEL LINES CONNECT GEODETIC MONUMENTATION

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THE WISCORS NETWORK THEN SITS ON THE PASSIVE NETWORK

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A NETWORK OF 85 PERMANENTLY MOUNTED GPS ANTENNAS SPACED 50

KM APART ACROSS THE STATE PROVIDING HIGHLY

ACCURATE CORRECTIONS IN REAL TIME

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WESTERN REGION HEIGHT MOD WEBINAR 2013

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RECEIVER

MONUMENT

ANTENNA

LIGHTNING SUPPRESSO

R

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SURVEYING AND ENGINEERING FLOOD PLAIN MAPPING EMERGENCY MANAGEMENT SERVICES ZERO VISIBILITY SNOW PLOWING UNDERGROUND UTILITY LOCATION GIS MAPPING PRECISION AGRICULTURE MARITIME ACTIVITIES POST PROCESSING REFERENCE DATA

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MINING EARTH MOVING CONSTRUCTION ATMOSPHERIC SCIENCES RAILROAD SIGNAL TIMING SEISMIC ACTIVITY WATER LEVELS LAND MANAGEMENT DROUGHT MONITOR MAPS

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.dat FILES DO NOT INCLUDE GLONASS INFORMATION. .tdg AND RINEX FILES INCLUDE BOTH CONSTELLATIONS

CORS STATIONS DATA AVAILABLE IN 1 SECOND EPOCHS FOR 60 DAYS

VRS STATION DATA AVAILABLE IN 1 SECOND EPOCHS FOR 30 DAYS

IF YOU NEED REFERENCE DATA FOR POST PROCESSING, PLEASE DOWNLOAD IT

WITHIN A WEEK OF DOING YOUR FIELD WORK.

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GIOVANNI SELLA, PhD.NATIONAL CORS PROGRAM MANAGER

CHUCK DEMETS, PhD.PROFESSOR OF GEOLOGYUW - MADISON

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PART OF THE NATIONAL HEIGHT MODERNIZATION PROGRAM MADE UP OF 6 CORE STATES, 4 OVERLAPPING STATES SHARING CORS STATIONS AT BORDERS WORKING TOWARDS A MULTI-STATE GIS DATABASE POSITION PAPER ON WHY STATE RTNs SHOULD BE ADMINISTERED BY THE STATE

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REPORTING ON MARKS IN NEIGHBORING STATES

RUN LEVEL LINES INTO NEIGHBORING STATES

SHARING DATA

JOINT SURVEY CAMPAIGNS

DOING FIELD WORK FOR OTHER STATES

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