[Federal Register Volume 78, Number 54 (Wednesday, March 20, 2013)]
[Notices]
[Pages 17185-17186]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2013-06375]


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DEPARTMENT OF DEFENSE

Department of the Air Force


U.S. Air Force Space Command Notice of Test

AGENCY: U.S. Air Force Space Command, Department of the Air Force, DoD.

ACTION: GPS Test Notice.

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SUMMARY: The purpose of this notification is to inform users of an 
upcoming event related to the GPS satellite constellation. U.S. Air 
Force Space Command will be testing CNAV capabilities on the GPS L2C 
and L5 signals on 15-29 June 2013. There are no planned GPS satellite 
outages for this activity. The broadcast navigation messages will be in 
compliance with IS-GPS-200 and IS-GPS-705. L2C/L5 CNAV testing will be 
transparent to GPS receivers that do not process L2C or L5 CNAV. U.S. 
Air Force Space Command

[[Page 17186]]

expects to conduct one to two CNAV tests per year over the next few 
years. These test events will provide an opportunity for civil users 
and manufacturers to participate in L2C/L5 evaluation and will result 
in enhanced provider and user readiness for L2C/L5 operations once the 
Next Generation GPS Operational Control System comes online in 2016. 
The draft test plan is available at (http://www.navcen.uscg.gov/L2C_L5_CNAV_Test_Plan.pdf). The draft test plan communicates details of 
the broadcast, data collection, and results reporting plans. U.S. Air 
Force Space Command and the National Space-Based Positioning, 
Navigation, and Timing Systems Engineering Forum (NPEF) encourage L2C 
and L5 users and receiver manufacturers to review the test plan, 
provide comments, and participate in the evaluation process. Comments 
to the test plan must be submitted on a Comment Resolution Matrix 
(http://www.navcen.uscg.gov/L2C_L5_CNAV_Test_Plan_Comments_BLANK.xlsx) by 29 April 2013 and sent to [email protected]. The final 
test plan will be posted (http://www.navcen.uscg.gov/L2C_L5_CNAV_Test_Plan.pdf) once all comments have been adjudicated. All user and 
manufacturer comments and the resulting adjudications will also be 
posted (http://www.navcen.uscg.gov/L2C_L5_CNAV_Test_Plan_Comments.pdf) consistent with the GPS public ICWG process. Any military 
or civil users who encounter user equipment problems during or after 
testing should contact the GPS Operations Center (GPSOC) (military), 
NAVCEN (civil, non-aviation) as soon as possible. Aviation users should 
file reports consistent with FAA-approved procedures.

FOR FURTHER INFORMATION CONTACT: Send all questions or concerns 
regarding the CNAV Test Plan to [email protected].

Henry Williams Jr,
Acting Air Force Federal Register Liaison Officer.
[FR Doc. 2013-06375 Filed 3-19-13; 8:45 am]
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