2015 Height Modernization Partner Meeting April 14 2015

2015 Height Modernization Partner Meeting April 14, 2015

Northern Gulf Coast Height Modernization Grant • In 2014, NGS awarded a five-year grant to a consortium of spatial reference centers and geodetic stakeholders in Texas, Louisiana, Mississippi, Alabama, and Florida knows as the Gulf Coast Spatial Reference Consortium (GCSRC). • The grant activities directly supports NOAA’s goals and objectives outlined for Resilient Coastal Communities and Economies. Specific targets include: • Enhanced geodetic control infrastructure • Support education, capacity building and technological outreach; • Coordinate partnerships with geodetic stakeholder groups • Data distribution, tools, and resources for analysis. • Consortium partners include Texas A&M University – Corpus Christi, Louisiana State University, The University of Southern Mississippi, Alabama Department of Transportation, and Florida Atlantic University.

Goals and Objectives – GPS Campaign • To extend GNSS multi-station height modernization network observations along the northern Gulf of Mexico from Texas to the Florida Keys incorporating tide gauge benchmarks, existing coastal CORS stations, and stable NGS vertical control benchmarks.

Goals and Objectives – 3 D Positioning • To provide accurate geodetic 3 D positions using NGS standards in the common National Spatial Reference System that is well connected to the International Terrestrial Reference Frame. These 3 D positions form the basis for the ongoing longterm monitoring of the relative sea-level and subsidence change along the northern Gulf of Mexico in the coming decades.

Goals and Objectives - CORS Installations • Expand the number of CORS stations on tide gauges along the northern Gulf of Mexico to assist in accurate 3 D positioning and to monitor subsidence rates adjacent to accurate sea level observations.

Study of Long-term CORS height data Heavener, OK Grand Isle, LA

Study of Long-term CORS height data Heavener, Oklahoma Fairly Stable Grand Isle, LA Subsidence obvious

CORS Installations adjacent CO-OPS tide gauges CORS Installation Cedar Key, FL CORS Installation St. Petersburg, FL CORS Installation Fernandina Beach, FL

Florida 4 CORS Installations 2014

Texas 5 CORS Installations 2014 (white stations)

Florida GPS Observations 2014 GPS Observations Panama City, FL GPS Observations Key West, FL

Florida GPS Network 2014

Florida GPS Network Description • Network consists of 34 points • All points occupied > 4 hrs. minimum and 2 sessions minimum, 18 sessions total. • New CORS occupied 24 hr. sessions (Duration). • Vertically constrained 7 first order points (ellipsoid height). • Ran Checks into Orthometric first order points and constrained if Orthometric Height < 4 cm. • Horizontally constrained 7 points (all CORS) • 2 Far CORS (> 1000 km for better Trop. model)

Florida GPS Network with 2 remote CORS

Florida GPS Network Survey 2014 • New CORS Stations (4) • Historical Tidal stations to be Blue booked (6) • Existing Tidal Station Checks (5) • Existing Vertical First Order marks used (12) • Existing Second Order Vertical marks used (2) • Existing marks in suspected subsidence areas (3)

LA, AL, FL GPS Network Survey 2015 This year Activities: • CORS Site Selection: LSU-LSRC & TAMU-CBI Conducted Site Selection Surveys: – Apalachicola, FL – Weeks Bay, AL – Port Sulphur, LA – Port Fourchon, LA – Cypremort Point, LA

LA, AL, FL GPS Network Survey 2015 This year Activities • Establish Reference Heights at CORS: New Scintrex CG-5 with an old La. Coste & Romberg G-Meter – Activity in the Planning Stage • Pilot Study: Observe Relative Gravity between CORS – Activity in Planning Stage – CG-5 Auto. Grav Acquired April 2015

TX, LA, MS, AL, FL CORS Network Manage and Distribute Geodetic Data and Information: • CORS Network Management • Distribute CORS Data

Intensify Marsh Elevation Measurements with Terrestrial Lidar Scanning (TLS) Study Area NERR SET Sites Aransas NWR Goose Island Mission-Aransas NERR SET Sites (Sediment Elevation Tables) TAMUCC Marsh Observatory (geodetic test site)

Laser Scanner Specifications Pulse Repetition Rate 300 k. Hz to 100 k. Hz Max. Range for Natural Target (p= 90%) Max. Number of Targets per Pulse Accuracy High Speed Mode: 350 m Long Range Mode: 600 m Single to many returns 5 mm at 100 m range Full-waveform digitization Image from NGS NOAA site photo Ulrich et. al. , 2011

Goals and Objectives – Education and Outreach • Support education, capacity building, and technology transfer through regional forums and meetings. Workshops will be coordinated with participants from NOAA, NGS, and other NHMP partners. Professional development units and/or continuing education credits will be awarded to event participants. 2014 Height Mod Workshop hosted by LSU 2015 Height Mod Session by CBI at TSPS Symposium

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