1. Positioning America for the Future NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION National Ocean Service National Geodetic Survey Real-Time Mantra Pass the positions, NOW!!

2. Positioning America for the Future NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION National Ocean Service National Geodetic Survey Applications for 1- 5 cm Real-Time Positioning Land surveying Remote sensing / photogrammetry Hydrography Machine control (construction, precision agriculture, mining)

3. Positioning America for the Future NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION National Ocean Service National Geodetic Survey Real-Time Applications (continued) Structural integrity monitoring (dams, bridges, critical facilities) Atmospheric monitoring (ionospheric & tropospheric modeling, weather forecasting) Tsunami & volcanic warning system (detecting seismic waves)

5. Precision Agriculture

6. Hourly Forecast of Precipitable Water

7. Positioning America for the Future NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION National Ocean Service National Geodetic Survey NOAA/NGS Goal for Real-Time Positioning Promote accurate and reliable real-time positioning services that are consistent with the National Spatial Reference System, whether these services are being provided by a public or commercial organization.

8. NGS: SUPPORT FOR REAL TIME POSITIONING I.Provide GNSS data from a fiducial network II.Develop guidelines for RTN users and operators III.Actively participate in educational and/or outreach activities involving real-time GNSS positioning IV.Study phenomena that affect accurate GNSS positioning NOAA/NGS Support for Regional Real-Time GNSS Networks (RTN)

9. Positioning America for the Future NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION National Ocean Service National Geodetic Survey PROVIDE REAL-TIME GNSS DATA FROM A FIDUCIAL NETWORK NOAA/NGS would publicly stream GNSS data (not correctors) via the Internet for ~ 200 federally-funded sites Anticipated intersite spacing = 200 km in CONUS Regional real-time networks may use the NOAA/NGS-provided data to calibrate and/or enhance their services (which typically require an intersite spacing of about 50 km)

10. Positioning America for the Future NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION National Ocean Service National Geodetic Survey DEVELOP GUIDELINES FOR RTN USERS AND OPERATORS Positional coordinates obtained using a regional real-time network should be compatible with the National Spatial Reference System User equipment should be able to operate with services from different real-time GNSS services Stations contained in each real-time GNSS network should meet prescribed criteria in terms of stability and data quality

11. WWW.NGS.NOAA.GOV

12. Positioning America for the Future NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION National Ocean Service National Geodetic Survey 12 Actively participate in educational and/or outreach activities involving real-time positioning Maintain a strong participatory presence and seek leadership roles at various conferences, meetings and venues where real time positioning is addressed. Participate in education and outreach to both disseminate relevant information as well as to acquire feedback regarding the suitability of guidelines promoted by NGS.

13. Positioning America for the Future NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION National Ocean Service National Geodetic Survey STUDY PHENOMENA THAT AFFECT ACCURATE GNSS POSITIONING Study time-dependent changes in positions (land subsidence, tectonic motion, earthquakes, volcanic activity, glacial isostatic adjustment, ocean tidal loading, atmospheric loading, etc.) Study satellite orbits, atmospheric refraction, multipath, antenna calibration, geoid, etc.)

14. 14 Horizontal Crustal Motion Horizontal velocities in the western U.S. relative to the North American Datum of 1983 as derived from geodetic observations.