Real Time Kinematic Technique Application on Coastal ... · Real Time Kinematic Technique...
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Real Time Kinematic Technique Application on Coastal
Geomorphology at GATEWAY National Recreation Area
Carlos P. Carvajal Norbert Psuty
Randall Fullmer William Schmelz
Andrea Spahn Mosaics in Science Program
Institute of Marine and Coastal Science - Rutgers University
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∗ Mosaics in Science Program and its partner organizations Matt Dawson
∗ Northeast Coastal and Barrier Network of NPS ∗ Coastal Geomorphology Group at the Institute of Marine
and Coastal Sciences, Rutgers University Norbert Psuty Andrea Spahn William Schmelz Randall Fullmer
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Acknowledgements
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Gateway National Recreation Area
Figure 1 Gateway National Recreation Area locator map (Psuty 2013)
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• In 1980:
• Long data collection days • Long post-processing to
obtain centimeter-level position.
• In 1990: • Tremendous amounts of
data in one day. • Efficient data management. • Centimeter-level positioning
in real time.
GPS Technology and Survey Methodology evolution
Figure 2 Real Time Kinematics. (NovAtel®)
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Real Time Kinematic or RTK survey technique
Trimmark Geodetic Antenna
Base Station Rover
Controller
Figure 3 Real-Time Kinematics (RTK) procedures courtesy of the U.S. Geological Survey
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∗ Virtual Reference Stations (VRS) configuration ∗ Cellphone Corrections ∗ Several spaced permanent
station communicating with a central station.
∗ Central station corrects position to the RTK user terminal.
∗ Easy Set up
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Real Time Kinematic or RTK survey technique
Figure 4. Leica Rover and Controller
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∗ Dilution of Precision (DOP) ∗ Base Station:
∗ Accuracy of known location of the base station
∗ Quality of base stations’ satellite information.
∗ Rover: ∗ Accuracy of Base-Station
location. ∗ Distance from the base
station. ∗ Site selection to minimize
environment effects.
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RTK Technique: Accuracy and Precision
Figure 5. Dilution of Precision showing poor satellite geometry. (NovAtel®)
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RTK Technique: Accuracy and Precision
∗ Dilution of Precision (DOP) ∗ Base Station:
∗ Accuracy of known location of the base station
∗ Quality of base stations’ satellite information.
∗ Rover: ∗ Accuracy of Base-Station
location. ∗ Distance from the base
station. ∗ Site selection to minimize
environment effects. Figure 6. Dilution of Precision showing improved geometry. (NovAtel®)
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• Gateway National Recreation Area • Geomorphological Monitoring Protocol • Goal and objective • Protocols
∗ Part I – 1D Ocean Shoreline Position ∗ Part II – 2D Coastal Topography ∗ Part III – 3D Digital Elevation Models (in progress)
∗ Data Analysis and final products
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Northeast Coastal and Barrier Network (NCBN)
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2D Coastal Topography
Edge of MUP Edge of Parking
Lot
18.58 m
-1
0
1
2
3
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0 20 40 60 80 100Elev
atio
n re
lativ
e to
NAV
D88
(m)
Distance from Benchmark (m)
GK2 Fall 2008
Fall 2009
Spring 2010
Fall 2011
Fall 2012
Post-Storm
Figure 7. (A) Benchmark monuments locations at Great Kills, (Psuty, 2012). (B) Profile of GK2 showing drastic changes prior and post hurricane Sandy.
A
B
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Digital Elevation Model (DEM)
Figure 8. DEM of Miller Field showing profile transects
Figure 9. Produced by Tucker Fullmer. DEM of Great Kills showing an artificial feature.
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Literature Cited ∗ NovAtel. Real-Time Kinematics. Retrieved July 30, 2013, from http://www.novatel.com/an-
introduction-to-gnss/chapter-4-advanced-gnss-concepts/real-time-kinematic-rtk/ ∗ Psuty N., et al. 2010. North Coastal and Barrier Network Geomorphological Monitoring
Protocol: Part II – Coastal Topography. Natural Resource Report NPS/HTLN/NRR – 20xx/xxx. National Park Services, Kingston, Rhode Island. Submitted Draft.
∗ Psuty N., et al. 2012. Coastal Profile Changes, Gateway National Recreation Area: Annual Monitoring Report, 2001-2012. Northeast Coastal and Barrier Network, National Park Service, KingstonSubmitted Draft.
∗ Psuty N., et al. 2013. Shore Change Trend Report, 2007-2012. Draft. ∗ USGS. USGS Global Positioning Application and Practice. Retrieved July 30, 2013, from
http://water.usgs.gov/osw/gps/
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Resources
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Thank you