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FGCS 1999 Annual Report

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<center><b>Federal Geographic Data Committee</b>

<p><b>Geodetic Control Subcommittee</b>

<p><b>1999 Report</b></center>



<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>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><b>Goal One: Increase the awareness and understanding of the vision

and concepts of NSDI through outreach and education</b>

<p><b>Objective:</b> Continue to provide public access to information on

aspects of geodetic surveying that are responsibility of civilian Federal

agencies

<p><b>- Action:</b> The FGCS Web site was refurbished on the model of the

FGDC Web site:

<p><font face="Times New Roman"><a href="http://www.ngs.noaa.gov/FGCS/">http://www.ngs.noaa.gov/FGCS/</a></font>

<p><b>Objective:</b> Continue to identify and address issues associated

with Global Positioning Systems (GPS) Modernization.

<p><b>- Action:</b><font face="Times New Roman"> Presented a set of workshops

including:</font>

<p><font face="Times New Roman">- GPS-Derived Orthometric Heights Workshops

- four presented</font>

<p><font face="Times New Roman">- Continuously Operating Reference Station

(CORS) Workshops - three presented</font>

<p><b>- Action:</b> In conjunction with preparing the National Oceanic

and Atmospheric Administration (NOAA) congressionally mandated Height Modernization

Study, follow-up forums were held in California and North Carolina to provide

information to and receive input from diverse interested constituency.

<p><b>Objective:</b> Continue to identify and address issues associated

with positioning accuracy, techniques, and reference frames.

<p><b>- Action:</b> <font face="Times New Roman">Presented a set of workshops

including</font>:

<p><font face="Times New Roman">- Geospatial Positioning Accuracy Standards

- two presented</font>

<p><font face="Times New Roman">- Development, Implementation, and Future

of the National Spatial Reference System - six presented</font>

<p><font face="Times New Roman"><b>Objective: </b>Evaluate surveying systems,

including the instrumentation, hardware, software, and procedures that

comprise that system.</font>

<p><font face="Times New Roman"><b>- Action:</b> Tested three GPS receivers:

Leica System 500 and the Javad Legacy and Regency.</font>

<p><font face="Times New Roman"><b>- Action:</b> FGCS has been able to

keep up with the preliminary letters but there is a backlog of final reports.

Reflecting the manufacturers' concern with FGCS getting the reports completed

on a timely basis, Trimble has written two sponsor-supplied summary reports

for their recently tested equipment. Because the tests are generally driven

by the manufacturers and not from within the Federal agencies, the intent

now is to shift responsibility onto the manufacturers for producing the

final reports. FGCS will provide a template for the manufacturers to fill

in, with place reserved for FGCS final comments.</font>

<p><b>- Action:</b> A new web site was established to provide access to

the testing schedule and test results and can be accessed by the following

web address:

<p><a href="http://www.ngs.noaa.gov/FGCS/instruments/reports/">http://www.ngs.noaa.gov/FGCS/instruments/reports/</a>

<p><b>- Action:</b> Updated standard operational procedures, forms, and

documentation by putting the Deliverables List for GPS Instrument Tests

and Recommended Observation Schedule on the Web.

<p><b>Goal 2: Develop common solutions for discovery, access, and use of

geospatial data in response to the needs of diverse communities</b>

<p><b>Objective: </b><font face="Times New Roman">Continue to provide access,

documentation, and guidance regarding Continuously Operating Reference

Station (CORS)</font>

<p><font face="Times New Roman"><b>- Action:</b> Developed, implemented,

and enhanced User Friendly CORS (UFCORS) to allow users to:</font>

<p><font face="Times New Roman">- Obtain CORS GPS data for an exact time

interval specified in international or local time,</font>

<p><font face="Times New Roman">- Choose a sampling rate for the requested

data,</font>

<p><font face="Times New Roman">- Specify how the data should be compressed

to speed data transfer to the user,</font>

<p><font face="Times New Roman">- Receive the requested information within

a few minutes,</font>

<p><font face="Times New Roman">- Obtain CORS log files automatically,</font>

<p><font face="Times New Roman">- Retrieve adopted NAD 83 and ITRF positions

and velocities for the CORS sites automatically,</font>

<p><font face="Times New Roman">- Retrieve the highly accurate GPS orbits

calculated by International GPS Service for Geodynamics (IGS), as well

as the "broadcast" GPS orbits automatically, and</font>

<p><font face="Times New Roman">- Obtain associated NGS data sheets automatically.</font>

<p><font face="Times New Roman"><a href="http://www.ngs.noaa.gov/CORS/">http://www.ngs.noaa.gov/CORS/</a></font>

<p><font face="Times New Roman"><b>Objective:</b> Continue to identify

and address issues associated with Global Positioning Systems (GPS) Modernization.</font>

<p><font face="Times New Roman"><b>- Action:</b> Provided a position paper

to the U.S. Department of Transportation PosNav Executive Committee on

the selection and character of the GPS civil signal and frequencies.</font>

<p><font face="Times New Roman"><a href="http://www.ngs.noaa.gov/FGCS/info/giacmem990430.html">http://www.ngs.noaa.gov/FGCS/info/giacmem990430.html</a></font>

<p><b>Goal 3: Use community-based approaches to develop and maintain common

collections of geospatial data for sound decision-making</b>

<p><b>Objective: </b>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. On going.

<p><b>- Action:</b> Thirty-three Continuously Operating Reference Stations

(CORS) to be brought online, resulting in a total of 165 CORS.

<p><font face="Times New Roman"><b>- Action:</b> Developed Cooperative

CORS - a method to electronically link via the Internet to CORS which are

not part of the National CORS network. The National CORS are those stations

meeting NOAA geodetic standards for installation, operation and data distribution.

The Cooperative CORS will supplement the National CORS network by providing

a dense system of reference stations to meet local needs.</font>

<p><font face="Times New Roman"><a href="http://www.ngs.noaa.gov/CORS/Coop/">http://www.ngs.noaa.gov/CORS/Coop/</a></font>

<p><font face="Times New Roman"><b>Objective:</b> Ongoing participation

in the nationwide augmentation of US Coast Guard conversion of US Air Force

Ground Wave Emergency Network (GWEN) sites to facilitate Nationwide Differential

GPS (NDGPS) primary coverage efforts.</font>

<p><font face="Times New Roman"><b>- Action:</b> Provided input regarding

siting of NDGPS sites in interior of Alaska as requested by Department

of Transportation and U.S. Coast Guard.</font>

<p><font face="Times New Roman"><b>Objective:</b> Participation in the

assembly of geospatial resources for disaster response and management.

Specifically, develop a scoping of the potential for geospatial assistance

for disaster management, including other Federal delivery programs.</font>

<p><font face="Times New Roman"><b>- No Action:</b> This objective could

not be adequately addressed and is now on hold.</font>

<p><b>Objective: </b>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 sector.

<p>- <b>Action:</b> In support of development of the <font face="Times New Roman">FGCS

sponsored <u>Geospatial Positioning Accuracy Standard, Part 2: Standards

for Geodetic Networks</u></font>, documentation of field specifications

<p><font face="Times New Roman"><u>NOS NGS-58 - Guidelines for Establishing

GPS-Derived Ellipsoid Heights</u> is on Web site:</font>

<p><font face="Times New Roman"><a href="http://www.ngs.noaa.gov/PUBS_LIB/NGS-58.html">http://www.ngs.noaa.gov/PUBS_LIB/NGS-58.html</a></font>

<p><font face="Times New Roman"><b>- Action:</b> Drafted specifications

for Federal Base Network re-observations, 2 cm horizontal and 2 cm ellipsoid

height accuracy standards, NGS Web site:</font>

<p><font face="Times New Roman"><a href="http://www.ngs.noaa.gov/ADVISORS/FBN/GPSmanual/">http://www.ngs.noaa.gov/ADVISORS/FBN/GPSmanual/</a></font>

<p><font face="Times New Roman"><b>- Action:</b> Disposition of the approval

process for updates to the <u>Input Formats and Specifications of the National

Geodetic Survey Data Base</u> (Blue Book) was relegated to the Methodology

Work Group. This resulted in lessening the burden on FGCS as a whole and

accelerating the approval process. The Blue Book may be accessed at:</font>

<p><font face="Times New Roman"><a href="http://www.ngs.noaa.gov/FGCS/tech_pub.html">http://www.ngs.noaa.gov/FGCS/tech_pub.html</a></font>

<p><font face="Times New Roman"><b>- Action:</b> After due consideration

the FGCS membership chose not to propose the Global Positioning System

(GPS) Receiver Independent Exchange (RINEX) format as an FGDC standard.

RINEX is recognized as a defacto industry standard.</font>

<p><b>Objective: </b>Ongoing participation in the nationwide implementation

of NAVD 88 and in the development of the Nation's geodetic height system

using GPS. Ongoing.

<p><b>- Action:</b> <font face="Times New Roman">The GPS-Derived Orthometric

Heights Guidelines have been drafted. <u>Guidelines for Establishing GPS-Derived

Ellipsoid Heights</u>, Some changes will be made based on recent studies</font>

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Last Updated: Feb 01, 2007 03:56 PM
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