PLSC Fall Technical Program Colorado Height Modernization Workshop

PLSC – Fall Technical Program Colorado Height Modernization Workshop Denver International Airport DIA Height Modernization Project Woolpert, Inc.

DIA – SURVEY VERTICAL DATUM NAVD 88 Project Statistics Leveling Project • 75 Total Stations • 64 New Vertical Stations • 3 -D marks • 11 Existing Benchmarks • 190 miles of 1 st order leveling • Status – Published 2 nd Order

DIA – SURVEY VERTICAL DATUM NAVD 88

DIA – SURVEY VERTICAL DATUM NAVD 88

DIA – SURVEY VERTICAL DATUM NAVD 88 Project Statistics RTK Positions • 64 new stations

DIA – SURVEY VERTICAL DATUM NAVD 88 Project Statistics – Height Modernization • Why? – Create local geoid model – Cost savings • • 18 stations from the leveling project 1 CT-CORS 4 Primary Stations 13 Local Network Stations

DIA – SURVEY VERTICAL DATUM NAVD 88 Project Highlights – Height Modernization • NGS-58 • L 1/L 2 FULL WAVE LENGTH RECEIVERS • GEODETIC ANTENNA • FIXED HEIGHT TRIPODS • BASELINES MEASURED TWICE • COMPLETELY DIFFERENT CONSTELLATIONS

DIA – SURVEY VERTICAL DATUM NAVD 88 Project Highlights – Height Modernization • FIVE GPS OBSERVERS • THREE DAYS OF PRIMARY TIES – 5: 30 HOUR SESSIONS – 1 PER DAY • THREE DAYS OBSERVATION OF LOCAL NETWORK – 1: 00 HOUR SESSIONS – 5 SESSION PER DAY

DIA – SURVEY VERTICAL DATUM NAVD 88

DIA – SURVEY VERTICAL DATUM NAVD 88

DIA – SURVEY VERTICAL DATUM NAVD 88 AIRPORT LAYOUT PLAN • FAA HAS MANDATED NAVD 88 END OF RUNWAY • FAA DATA SET – UDDF FILES – AVN DATA NAVIGATION AIDS • FAA HAS MANDATED NAVD 88

Questions ? ? Kevin Hoffman, PLS Project Manager - Denver Woolpert, Inc. 116 Inverness Dr. East, Ste. 105 Englewood, Co 80112