[time-nuts] SV 27 Not OK

[Magnus Danielson]

On 06/03/2013 06:25 AM, Mark C. Stephens wrote:
> I see they have retired USA-84. http://en.wikipedia.org/wiki/USA-84
> It is still up there transmitting though. Perhaps it won't turn off :)

Just because you receive PRN 27 does not mean that SVN 27 is 
transmitting it. Checking modern status and NANU at
http://www.navcen.uscg.gov/?Do=constellationstatus

discloses:

2013031 	

NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013031
SUBJ: SVN66 (PRN27) LAUNCH JDAY 135
1. NANU TYPE: LAUNCH
NANU NUMBER: 2013031
NANU DTG: 152256Z MAY 2013
SVN: 66
PRN: 27
LAUNCH JDAY: 135
LAUNCH TIME ZULU: 2138

2. GPS SATELLITE SVN66 (PRN27) WAS LAUNCHED ON JDAY 135.
A USABINIT NANU WILL BE SENT WHEN THE SATELLITE IS SET ACTIVE TO SERVICE.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER AT HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 
560-2541,
COMM 719-567-2541,GPSOPERATIONSCENTER at US.AF.MIL , 
HTTPS://GPS.AFSPC.AF.MIL/GPSOC/GPS
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3514. COMM 
805-606-3514.
JSPOCCOMBATOPS at VANDENBERG.AF.MIL

so SVN66 now has PRN27.

Cheers,
Magnus