[Federal Register Volume 69, Number 184 (Thursday, September 23, 2004)]
[Notices]
[Page 57005]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 04-21366]


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DEPARTMENT OF DEFENSE

Department of the Air Force


Request for Public Review and Comment of Changes to the Navstar 
GPS Space Segment/Navigation User Segment Interface Control Document 
(ICD)

AGENCY: Department of the Air Force, DoD.

ACTION: Notice and request for review/comment of changes to ICD-GPS-
200C.

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SUMMARY: This notice informs the public that the Global Positioning 
System (GPS) Joint Program Office (JPO) proposes to revise ICD-GPS-200, 
Navstar GPS Space Segment/Navigation User Interfaces. This proposal 
changes the document identifier from ICD-GPS-200 to Interface 
Specification (IS)-GPS-200. In addition, this revision will increment 
the revision letter from C to D, resulting in IS-GPS-200 Revision D. 
One of the main subjects of this revision effort is an introduction of 
new Improved Clock & Ephemeris (ICE) navigation message that will be 
broadcast with L2 C signal. These proposed changes are described in a 
Draft IS-GPS-200D, dated 9 July 2004. This draft document is an updated 
version of the draft document previously released in February 2004. The 
draft document can be viewed and downloaded at the following Web site: 
http://gps.losangeles.af.mil. Click on ``System Engineering'', then 
``Public Interface Control Working Group (ICWG)''. Reviewers should 
save the document to a local memory location prior to opening and 
performing the review.

ADDRESSES: Submit comments to SMC/GPERC, 2420 Vela Way, Suite 1467, El 
Segundo CA 90245-4659. A comment matrix is provided for your 
convenience at the web site and is the preferred method of comment 
submittal. Comments may be submitted to the following Internet address: 
[email protected]. Comments may also be sent by fax to 1-310-
363-6387.

DATES: The suspense date for comment submittal is 30 October 2004.

FOR FURTHER INFORMATION CONTACT: GPERC at 1-310-363-2883, GPS JPO 
System Engineering Division, or write to the address above.

SUPPLEMENTARY INFORMATION: The civilian and military communities use 
the Global Positioning System, which employs a constellation of 24 
satellites to provide continuously transmitted signals to enable 
appropriately configured GPS user equipment to produce accurate 
position, navigation, and time information.

Pamela D. Fitzgerald,
Air Force Federal Register Officer.
[FR Doc. 04-21366 Filed 9-22-04; 8:45 am]
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