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KF5JRV > INFO 31.01.19 13:50l 133 Lines 7020 Bytes #999 (0) @ WW
BID : 30376_KF5JRV
Read: GUEST
Subj: GPS CONSTELLATION STATUS - Jan 31
Path: IW8PGT<IR2UBX<DB0RES<DB0EEO<DB0GOS<ON0AR<OZ5BBS<CX2SA<N3HYM<KF5JRV
Sent: 190131/1242Z 30376@KF5JRV.#NWAR.AR.USA.NA BPQ6.0.18
UNITED STATES NAVAL OBSERVATORY (USNO)
GPS CONSTELLATION STATUS
************************************************************************
Information in this file is retained for approximately seven
days or until completion of the event; be aware that the
information provided below may change.
************************************************************************
A. BLOCK II/IIA/IIR/IIR-M INDIVIDUAL SATELLITE STATUS
SVN PRN
34 18 Launched 26 OCT 1993; usable 20 MAR 2018; operating on Rb std
Unusable 23 Jan 2341 UT to 2342 UT
(NANU 2019014/23 JAN)
Unusable 24 Jan 1445 UT to 2256 UT due to
maintenance (NANUs 2019010, 2019016/24 JAN)
36 04 Launched 10 MAR 1994; operating on Rb std
43 13 Launched 23 JUL 1997; usable 31 JAN 1998; operating on Rb std
44 28 Launched 16 JUL 2000; usable 17 AUG 2000; operating on Rb std
45 21 Launched 31 MAR 2003; usable 12 APR 2003; operating on Rb std
Scheduled unusable 31 Jan 0715 UT to 1915 UT for
repositioning maintenance (NANU 2019015)
46 11 Launched 07 OCT 1999; usable 03 JAN 2000; operating on Rb std
47 22 Launched 21 DEC 2003; usable 12 JAN 2004; operating on Rb std
48 07 Launched 15 MAR 2008; usable 24 MAR 2008; operating on Rb std
50 05 Launched 17 AUG 2009; usable 27 AUG 2009; operating on Rb std
51 20 Launched 11 MAY 2000; usable 01 JUN 2000; operating on Rb std
52 31 Launched 25 SEP 2006; usable 12 OCT 2006; operating on Rb std
Scheduled unusable 04 Jan 0905 UT to 2105 UT for
repositioning maintenance (NANU 2018074)
Outage cancelled for day 004
(NANUs 2018074, 2019003/03 JAN)
Outage cancelled for day 004
(NANUs 2018074, 2019003/03 JAN)
Outage cancelled for day 004
(NANUs 2018074, 2019003/03 JAN)
53 17 Launched 26 SEP 2005; usable 16 DEC 2005; operating on Rb std
55 15 Launched 17 OCT 2007; usable 31 OCT 2007; operating on Rb std
56 16 Launched 29 JAN 2003; usable 18 FEB 2003; operating on Rb std
Unusable 21 Dec 1304 UT until further notice
(NANU 2018071)
57 29 Launched 20 DEC 2007; usable 02 JAN 2008; operating on Rb std
58 12 Launched 17 NOV 2006; usable 13 DEC 2006; operating on Rb std
59 19 Launched 20 MAR 2004; usable 05 APR 2004; operating on Rb std
60 23 Launched 23 JUN 2004; usable 09 JUL 2004; operating on Rb std
61 02 Launched 06 NOV 2004; usable 22 NOV 2004; operating on Rb std
62 25 Launched 28 MAY 2010; usable 27 AUG 2010; operating on Rb std
Scheduled unusable 11 Dec 0535 UT to 1735 UT for
repositioning maintenance (NANU 2018057)
Outage cancelled for day 345
(NANUs 2018057, 2018060/11 DEC)
63 01 Launched 16 JUL 2011; usable 14 OCT 2011; operating on Rb std
64 30 Launched 21 FEB 2014; usable 30 MAY 2014; operating on Rb std
65 24 Launched 04 OCT 2012; usable 14 NOV 2012; operating on Cs std
66 27 Launched 15 MAY 2013; usable 21 JUN 2013; operating on Rb std
Unusable 07 Oct 0807 UT until further notice
(NANU 2018044)
67 06 Launched 17 MAY 2014; usable 10 JUN 2014; operating on Rb std
68 09 Launched 02 AUG 2014; usable 17 SEP 2014; operating on Rb std
69 03 Launched 29 OCT 2014; usable 12 DEC 2014; operating on Rb std
70 32 Launched 05 FEB 2016; usable 09 MAR 2016; operating on Rb std
71 26 Launched 25 MAR 2015; usable 20 APR 2015; operating on Rb std
72 08 Launched 15 JUL 2015; usable 12 AUG 2015; operating on Cs std
73 10 Launched 31 OCT 2015; usable 09 DEC 2015; operating on Rb std
74 04 Launched 23 DEC 2018; operating on Rb std
B. GPS ACTIVITIES
1. CNAV Testing
Air Force Space Command will be implementing CNAV messages on the GPS L2C
and L5 signals beginning J118/ 1430Z with updates from the control segment
approximately twice per week. The message populated signal content will
include broadcast message types (MT) 10, 11, 30, and 33. There are no
planned GPS satellite outages or degradations for this activity. L2C and
L5 CNAV messages should be transparent to GPS receivers that do not process
L2C or L5 CNAV messages. These populated signals are intended to
facilitate user familiarization and development of compatible user
equipment.
NOTE: Until further notice, the L2C and L5 signals are considered
pre-operational. A pre-operational signal means the availability and other
characteristics of the broadcast signal may not comply with all
requirements of the relevant interface specifications and should be
employed at the users' own risk. Therefore these signals should not be used
for safety-of-life or other critical purposes. Any military or civil users
who encounter user equipment problems following message population of the
L2C and L5 signals should contact the applicable POCs identified below as
soon as possible. Aviation users should file reports consistent with
FAA-approved procedures.
UPDATE: Additionally, the CNAV message health bits will indicate that the
L1 and L2 signals are healthy, but that the L5 signal is unhealthy. The
cnav message health bits may function independently from the legacy message
health bits and should not be considered reliable indicators of signal
quality or performance during pre-operational use.
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@us.af.mil, https://gps.afspc.af.mil
Military Alternate - Joint Space Operations Center, DSN 276-3514
3. Coordinated Universal Time (UTC) Time Step (Leap Second)
A Leap Second will be added on 31 December, 2016. Beginning 1 January,
2017, GPS will be ahead of UTC by EIGHTEEN (+18) seconds.
4. Implementation of Selective Availability (SA)
a. SA was reactivated on July 1, 1991 at 0400 UT. Civil users will receive
Standard Positioning Service (SPS) accuracy as specified in the Federal
Radionavigation Plan (FRP). POC for policy: CDR Jackson at
DSN 692-2634 or (719) 554-2634. (NANU 121-91182/DTG 011354Z JUL 91)
b. According to the 2nd Satellite Operations Squadron (2SOPS)
Operational Advisory Bulletin: SA was implemented on November 15,
1991 to the SPS level.
c. SA was permanently deactivated on May 2, 2000 at 0400 UT.
For information concerning: BLOCK II see file . . . . . GPSB2
GPS SYSTEM see file . . . . . GPSSY
TIME TRANSFER see file . . . . . GPSTT
--
File gpstd.txt
last updated
Wed Jan 30 11:00:08 UTC 2019
73 de Scott KF5JRV
Pmail: KF5JRV@KF5JRV.#NWAR.AR.USA.NA
email: KF5JRV@ICLOUD.COM
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