The National Geodetic Survey welcomes real-time GNSS network vendors, managers, and users to Memphis, TN on July 16-17, 2012 to examine how local GNSS augmentations interact with each other, with NGS, with the NSRS, and with users, vendors, and operators. Details regarding registration, hotels, agenda, etc. will be emailed to you in approximately 2 weeks. A proposed agenda is found below your reference. We look forward to seeing you in Memphis this July!Please take a moment and respond to the following:1. Do you plan on attending the Symposium?2. If so, how many attendees from your company or agency do you anticipate attending?3. Would you be interested in giving a short presentation?Send responses to: william.henning@noaa.govNational Symposium for Real Time GNSS Networks
There are currently over 100 GNSS Real Time Networks (RTN) operating in the United States. These RTN provide a valuable service and include a variety of operational formats, procedures and techniques. Sitting between the CORS and the local practitioner, they offer significant cost effective positioning for a wide variety of users. Because of this, they are becoming the primary control basis for local projects and applications. The National Geodetic Survey (NGS) is inviting representatives from these networks to a two-day symposium to discuss various issues of mutual concern.
The Symposium will include invited and contributed presentations from federal agencies, RTN operators, and RTN users. Topics for the Symposium sessions may include:
Day 1 – Operating & Using RTN
· Registration/coffee [7:30 – 8:00]
· Welcome & Introduction [8:00 – 8:20]
· Updates to the NSRS [8:30 – 9:30] – 2 speakers
o Readjustments of NAD 83- NAD 83(2011)
o New hybrid geoid models – geoid 12
o New datums in 2022 – geometrical/geopotential
· Break [9:30 – 9:45]
· RTN Operations – Operator’s Perspective [9:45 – 11:00] – 3 speakers
o Reference frame- coordinate basis, epoch
o Reliability – empirical field results, site requirements
o Important planning-Reference station density, software, comms
o User base – formats, number, applications
o Use of RTCM 3.x and NTRIP – message types, interoperability
· RTN Operations – User’s Perspective [11:00 – 12:00] – 3 speakers
o Precisions/Accuracies- criteria for data collection
o Reliability – necessary redundancy, multipath
o Procedures – localizing to passive marks, MAC vs. VRS
o Interoperability of RTNs – equipment
o Importance of RTCM 3.x at the rover
· Lunch [12:00 – 13:30]
· RTN Applications [13:30 – 14:30] – 3 or 4 speakers
o Surveying/Engineering
o Machine guidance
o Precision Agriculture
o GIS
o Scientific/academic
· Break [14:30 – 14:45]
· Panel Discussion of the day’s topics with the attendees (≥ 2 hours?) [14:45 – 17:00]
Day 2-The Federal Role in support of RTN
· Coffee [7:30 – 8:00]
· Recap of salient points from Day 1, Intro Day 2 [8:00 – 8:45]
· Provide streaming near RT CORS data [8:45 – 9:45] – 2 speakers
o The need- federal users, IGS, NSF recommendations, public, private
o Legality – Precedents, NGS mission, strategic plan
o How – current set up, future foundation CORS
o Decisions- public/private/federal only?
· Break [9:45 – 10:15]
· NGS Guidelines for RTNs [10:15 – 11:45]- 3 or 4 speakers
o NGS goals for RTN
o Adherence to NSRS – how, why
o Obtaining coordinates for RTN stations
o Validation of precision/accuracy- measurable criteria, NGS tools
o Basic Information for users/administrators- what more is needed in the draft?
· Lunch [11:45 – 13:15]
· NGS Tools for RTNs [13:15 – 14:30] – 3 speakers
o OPUS RS – ≤ 2 hours, IDOP, field verification for users
o OPUS-S/DB – ≥ 2 hours, RTN validation
o OPUS-Projects – RTN station adjustment
o OPUS-Net – advantage over OPUS-S
o Geoid models ≈ 2022 = 2 cm ortho accuracy to a project site
o Reference stations in NSRS – CORS weighting in RTN adjustments
o Archive history of reference station positions?
· Break [14:30 – 14:45]
· Panel Discussion of the day’s topics with the attendees (≥ 2 hours?) [14:45 – 16:45]
· Symposium Summary- actions forward [16:45 – 17:00]
—
William Henning
Geodesist, PLS – National Geodetic Survey
Spatial Reference System Division
Geodetic Standards & Applications
1315 East – West Highway
N/NGS 21
Silver Spring, MD 20910
301.713.3196
301.713.4324 fax
william.henning@noaa.gov