[Federal Register Volume 64, Number 22 (Wednesday, February 3, 1999)]
[Notices]
[Pages 5337-5338]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 99-2503]
=======================================================================
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
Stand-Alone Airborne Navigation Equipment Using the Global
Positioning System Augmented by the Wide Area Augmentation System
AGENCY: Federal Aviation Administration, DOT.
ACTION: Notice of availability for public comment.
-----------------------------------------------------------------------
SUMMARY: This notice announces the availability of and requests
comments on a proposed Technical Standard Order (TSO) pertaining to
stand-alone airborne navigation equipment using the Global Positioning
System (GPS) Augmented by the Wide Area Augmentation System (WAAS). The
proposed TSO prescribes the minimum operational performance standards
that stand-alone airborne navigation equipment must meet to be
identified with the marking ``TSO-C146.''
[[Page 5338]]
DATES: Comments must be received on or before April 16, 1999.
ADDRESSES: Send all comments on the proposed technical standard order
to: Avionics Systems Branch, AIR-130, Aircraft Engineering Division,
Aircraft Certification Service, Federal Aviation Administration, 800
Independence Avenue, SW., Washington, DC 20591. Or deliver comments to:
Federal Aviation Administration (FAA), Room 815, 800 Independence
Avenue, SW., Washington, DC 20591. Comments must identify the TSO file
number.
FOR FURTHER INFORMATION CONTACT:
Ms. Michelle Swearingen, Avionics Systems Branch, AIR-130, Aircraft
Engineering Division, Aircraft Certification Service, Federal Aviation
Administration, 800 Independence Avenue, SW., Washington, D.C. 20591,
(202) 267-3817, FAX No. (202) 493-5173.
SUPPLEMENTARY INFORMATION:
Comments Invited
Interested persons are invited to comment on the proposed TSO
listed in this notice by submitting such written data, views, or
arguments as they desire to the above specified address. Comments
received on the proposed technical standard order may be examined,
before and after the comment closing date, in Room 815, FAA
Headquarters Building (FOB-10A), 800 Independence Avenue, SW.,
Washington, D.C. 20591, weekdays except Federal holidays, between 8:30
a.m. and 4:30 p.m. All communications received on or before the closing
date for comments specified above will be considered by the Director,
Aircraft Certification Service before issuing the final TSO.
Background
The Wide Area Augmentation System (WAAS) is an augmentation to GPS
that calculates GPS integrity and correction data on the ground and
uses geostationary satellites to broadcast GPS integrity and correction
data to GPS/WAAS users and to provide ranging signals. It is a safety
critical system consisting of a ground network of reference and
integrity monitor data processing sites to assess current GPS
performance, as well as a space segment which broadcasts that
assessment to Global Navigation Satellite System users to support
enroute through precision approach navigation. Users of the system
include all aircraft applying the WAAS data and ranging signal.
Wide area reference stations and integrity monitors are widely
dispersed data collection sites that contain GPS/WAAS ranging receivers
which monitor all signals from the GPS, as well as the WAAS
geostationary satellites. The reference stations collect measurements
from the GPS and WAAS satellites so that differential corrections,
ionospheric delay information, GPS/WAAS accuracy, WAAS network time,
GPS time, and UTC can be determined. The standards of this TSO apply to
equipment designed to accept a desired flight path and provide
deviation commands referenced to that path. These deviations will be
used by the pilot or autopilot to guide the aircraft.
How To Obtain Copies
A copy of the proposed TSO-C146 may be obtained via Internet
(http://www.faa.gov/avr/air/100home.htm) or on request from the office
listed under FOR FURTHER INFORMATION CONTACT. RTCA Document No. 229A,
``Minimum Operational Performance Standards for Global Positioning
System/Wide Area Augmentation System Equipment,'' dated June 8, 1998,
RTCA Document No. DO-160D, ``Environmental Conditions and Test
Procedures for Airborne Equipment,'' dated July 29, 1997; and RTCA
Document No. DO-178B, ``Software Considerations in Airborne Systems and
Equipment Certification,'' dated December 1, 1992, RTCA Documents No.
DO-200A, ``Standards for Processing Aeronautical Data,'' may be
purchased from the RTCA Inc., 1140 Connecticut Avenue, NW., Suite 1020,
Washington, D.C. 22036.
Copies of the RTCA documents may be inspected at the FAA at the
location listed under ADDRESSES. However, RTCA documents are
copyrighted and may not be copied without the written consent of RTCA,
Inc.
Issued in Washington, DC, on January 28, 1999.
James C. Jones,
Manager, Aircraft Engineering Division, Aircraft Certification Service.
[FR Doc. 99-2503 Filed 2-2-99; 8:45 am]
BILLING CODE 4910-13-M
