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FGCS 1997 Annual Report

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<P ALIGN="CENTER"><STRONG>Geodetic Control Subcommittee</STRONG></P>

<P>                   </P>

<P>The Federal Geodetic Control Subcommittee (FGCS) of the Federal

Geographic Data Committee exercises government-wide leadership in

coordinating the planning and execution of geodetic surveys, in developing

standards and specifications for these surveys, and in the exchange of

geodetic survey data and technical information.  FGCS coordinates Federal

agencies' aspects of surveying that are governmental responsibilities.  These

responsibilities include standards setting, testing new geodetic

instrumentation and operational systems, coordination of user agency

requirements, and dissemination of government data to user agencies.</P>


<P>The FGCS acts to ensure that the Global Positioning System (GPS) will

continue to meet the positioning needs of the Federal civilian community and

works to strengthen the ties between the GPS positioning and navigation

communities.  This responsibility will be implemented through its role as

GPS Interagency Advisory Council (GIAC) to the Department of

Transportation PosNav Executive Committee.</P>



<P ALIGN="CENTER">NSDI Strategic Goal 1</P>

<P ALIGN="CENTER">Increase the awareness and understanding of the vision and concepts of NSDI

through outreach and education</P>


<P ALIGN="CENTER">                                                      </P>

<P ALIGN="CENTER"><STRONG>Geodetic Control Subcommittee</STRONG></P>


<P><STRONG>Objective:  </STRONG>Identify and address issues relating to long term planning of

Position/Velocity/Timing (PVT) systems</P>


<P><STRONG>	Action:</STRONG>  The GPS Interagency Advisory Council (GIAC) provided input to

the U.S. Air Force Capstone Requirements Document addressing future

needs of users of the U.S. PVT systems.  </P>

<P>	<STRONG>Outcomes:</STRONG>  A compilation of future PVT requirements of GIAC member

agencies and private sector constituents represented by GIAC.</P>

<P>	<STRONG>Date:</STRONG>  May 9, 1997</P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS/GIAC, NOAA</P>



<P><STRONG>Objective:  </STRONG>Identify and address issues associated with Global Positioning

System (GPS) Modernization.</P>


<P>	<STRONG>Action:</STRONG>  GIAC in collaboration with the Institute of Navigation (ION)

held two GPS Modernization Technical Sessions/Workshops: August 26

and November 6.  Ongoing.</P>

<P>	<STRONG>Outcomes:</STRONG>  Three ION facilitated working groups were formed with

GIAC participation to investigate topics associated with GPS

modernization. Defined how GIAC user GPS accuracy requirements

could be met with three levels of positional accuracy. </P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS/GIAC, NOAA, co-sponsor:  ION</P>


<P>	<STRONG>Action:</STRONG>  Five GPS-Derived Orthometric Height Workshops given.</P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS Vertical Reference Working Group, NOAA, Co-sponsors:  California Land Surveyors Association, Oregon GPS Users

Group, Washington GPS Users Group, Land Surveyors Association of

Washington, American Society for Surveying and mapping (ACSM).</P>


<P>	<STRONG>Action:</STRONG>  Continuously Operating Reference Stations (CORS) Workshop,

Houston, TX. </P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS Fixed Reference Station Working  Group,

NOAA, Co-sponsor:  Texas Society of Professional Surveyors.</P>



<P><STRONG>Objective:  </STRONG>Identify and address issues associated with positioning accuracy,

techniques, and reference frames.</P>


<P>	<STRONG>Action:</STRONG>  Geospatial Positioning Accuracy Standards Workshops,

Raleigh, NC and Williamsburg, VA. </P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS Methodology Working Group, NOAA, Co-sponsor:  ACSM.</P>


<P>	<STRONG>Action:</STRONG>  Field Procedures Required to Meet Survey Standards and

Specifications Workshop, Largo, MD. </P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS Methodology Working Group, NOAA, Co-sponsor:  Maryland Society of Professional Surveyors.</P>


<P>	<STRONG>Action:</STRONG>  Four Development, Implementation and Future of the National

Spatial Reference System Workshops. </P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS Methodology Working Group, NOAA, Co-sponsors:  California Land Surveyors Association, Massachusetts

Association of Land Surveyors and Civil Engineers, Professional Land

Surveyors of Wyoming, Florida GPS Users Group.</P>


<P>	<STRONG>Action:</STRONG>  Three State Plane Coordinate and Datum Transformation

Workshops. </P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS Methodology Working Group, NOAA, Co-sponsors:  ACSM, Fresno State University, Texas Society of

Professional Surveyors.</P>







<P><STRONG></STRONG><STRONG>Objective:  </STRONG>Evaluate new technologies and approaches that are used in

surveying systems, including the instrumentation, hardware, software, and

procedures that comprise that system.  Notify and pass on necessary data to

the Methodology working group if it the National Geodetic Survey

specifications and/or standards need to be revised.  Outreach to the public

about the technological changes within the surveying community.</P>


<P><STRONG>	Action:</STRONG>  Completed testing of NovAtel L1/L2 Outrider GPS survey


<P>	<STRONG>Outcomes:</STRONG>  Work was accomplished on the web site to allow this set

of data to be posted onto the FGCS Instrument Work Group (IWG) area

of the FGCS web pages.  NovAtel has introduced many new antenna

types into the GPS world.  Although the newest antenna from NovAtel

was not available for the test, it was sent soon after.  Testing of the

antenna was accomplished at the NGS Corbin, Virginia, facility.  This

data was also posted to the web.  Results were good and it is

anticipated that the NovAtel test was successful.   A preliminary

letter of acceptance will be drafted pending review of recently

received data from NovAtel.</P>

<P>	<STRONG>Date:</STRONG>  June 15-20, 1997</P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS/Instrument Working group, DOT, USGS, and



<P><STRONG>	Action:</STRONG>  Completed testing of two Ashtech surveying systems:  the GPS

based Ashtech Z-Surveyor, and the GPS and GLONASS based Ashtech GG-Surveyor.</P>

<P>	<STRONG>Outcomes:</STRONG>  This was the first FGCS test of a surveying system that

uses the Russian  GLONASS constellation of satellites.   At the

insistence of the FGCS testing team, the kinematic tests for the GG-Surveyor system were accomplished, and a comparison of the results

with the Ashtech software and the TerraSat software was

accomplished.  Both software sets are available for purchase, but no

comparison for consistency of results between the two software

packages using the same set of data had been done for public

dissemination.  The FGCS pointed out that the reference systems and

the transformation parameters used need to conform to published

standards.  The results were satisfactory and it is anticipated that

both Ashtech systems will receive a preliminary letter of acceptance

will be drafted.</P>

<P>	<STRONG>Date:</STRONG>  November 15-21, 1997</P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS/Instrument Working group, DOT, USGS, and



<P><STRONG>	Action:</STRONG>  Performed preliminary testing of the Zeiss digital bar code

level DiNi 10.</P>

<P>	<STRONG>Outcomes:</STRONG>  It has been a goal to test other digital levels than the

Leica.  This goal has now been achieved, alleviating the concern about

one manufacturer claiming to have the only FGCS tested system.  Some

of the data necessary for evaluation has been collected.</P>

<P>	<STRONG>Date:</STRONG>  December 5, 1997</P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS/Instrument Working group, DOT, USGS, and



<P><STRONG>	Action:</STRONG> Provided Internet access for test data and existing reports.</P>

<P>	<STRONG>Outcomes:</STRONG>  There have been several upheavals in this process.  Work

was, therefore, focused on standardizing certain processes that the

FGCS IWG for every test and improving coordination with NGS.  Several

draft reports, notices, maps of the test course, and other information

are now posted on the web.  The United States Coast Guard (USCG)

Navigation Center (NAVCEN) is the official outreach to the civilian

community on GPS matters, which maintains a web site to outreach to

the civilian community from DoD on information on GPS per

Memorandum of Agreement between DoD and DOT.  The USCG NAVCEN

maintains a web site on GPS and other radionavigation systems and

issues.  This site obtains over 650,000 hits per month.  A link for FGCS

information was established with this web site and some support was


<P>	<STRONG>Date:</STRONG>  1997</P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS/Instrument Working group, DOT, USGS, and



<P><STRONG>	Action:</STRONG> Opened GPS test course to manufacturers.</P>

<P>	<STRONG>Outcomes:</STRONG>  Magellan came through and used the FGCS test course in

August, 1997.</P>

<P>	<STRONG>Date:</STRONG>  1997</P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS/Instrument Working group, DOT, USGS, and




<P ALIGN="CENTER">NSDI Strategic Goal 3</P>

<P>Use community-based approaches to develop and maintain common collections

of geospatial data for sound decision-making</P>




<P ALIGN="CENTER"><STRONG>Geodetic Control Subcommittee</STRONG></P>


<P><STRONG>Objective:  </STRONG>Monitor compatibility of Federal fixed reference stations with

NAD 83 and their relationship to the development of a single Continuously

Operating Reference Station (CORS) system to meet the requirements of

Federal GPS post-processing procedures. Ongoing.</P>


<P>	<STRONG>Action:</STRONG>  Twenty-eight CORS brought online.</P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS Fixed Reference Stations Work Group, NOAA</P>



<P><STRONG>Objective:  </STRONG>Ongoing development, publishing, and maintenance of accuracy,

collection, content, transfer, and archive standards for geodetic, land and

resource surveys, and their related metadata.  Promote the use of these

standards by Federal, state, and local levels of government and the private



<P>	<STRONG>Action:</STRONG>  Develop "SDTS Part 6, Point Profile", completed and approved

by the  FGDC Steering Committee.</P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS Methodology Working Group, NOAA </P>


<P>	<STRONG>Action:</STRONG>  Develop "Geospatial Positioning Accuracy Standard".  The

comment period is over.  Any further action is dependent upon decision

by the FGDC Standards Working Group resulting form their review of

the comments. </P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS Methodology Working Group, NOAA</P>


<P> </P>


<P><STRONG>Objective:  </STRONG>Ongoing participation in the nationwide implementation of NAVD

88 and in the development of the Nation's geodetic height system using GPS. 


<P>	</P>

<P>	<STRONG>Action:</STRONG>  Submitted "Guidelines for Establishing GPS-derived Ellipsoid

Heights (Standards:  2 cm and 5 cm)".</P>

<P>	<STRONG>Responsible Party:</STRONG>  FGCS Vertical Reference Systems Work Group,



<P> </P>


<P><STRONG>Objective:  </STRONG>Ongoing participation in the implementation of the geodetic data



<P>	<STRONG>Action:</STRONG>  Completed Geodetic Control Framework Profile</P>

<P>	<STRONG>Responsible Party:</STRONG> FGCS, NOAA</P>

<P>	</P>





Last Updated: Feb 01, 2007 03:56 PM
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