iq4u2c Posted September 9, 2009 Posted September 9, 2009 "GPS USERS MAY EXPERIENCE A TEMPORARY DEGREDATION IN GPS RECEIVER RECEPTION IN THE FOLLOWING AREAS, SOUTHERN NEBRASKA, KANSAS, OKLAHOMA, SOUTHWESTERN ARKANSAS, EASTERN TEXAS, AND WESTERN LOUISIANA FROM 111302Z - 111323Z SEP 09 DUE TO SATELLITE MAINTENANCE." Report a problem here. Quote
+Colonial Cats Posted September 9, 2009 Posted September 9, 2009 (edited) 20 seconds? No, 21 minutes. (111302Z - 111323Z SEP 09) More precisely, from 1:02pm to 1:23pm Zulu (London, England time) Septemter 11th, 2009. Edited September 9, 2009 by Colonial Cats Quote
iq4u2c Posted September 9, 2009 Author Posted September 9, 2009 21 minutes. but i know how the military is. it'll probably be all day. Quote
+Red90 Posted September 9, 2009 Posted September 9, 2009 No, 21 minutes. What are the first two digits? Quote
+Colonial Cats Posted September 9, 2009 Posted September 9, 2009 No, 21 minutes. What are the first two digits? More precisely, from 1:02pm to 1:23pm Zulu (London, England time) Septemter 11th, 2009. 11 is the day of the month. Quote
+coggins Posted September 9, 2009 Posted September 9, 2009 20 seconds? Here's the advisory: From: -deleted-Subject: High Horizontal Dilution of Precision (HDOP) Advisory Date: Tue, September 8, 2009 7:05 pm To: -deleted- GPS USERS MAY EXPERIENCE A TEMPORARY DEGREDATION IN GPS RECEIVER RECEPTION IN THE FOLLOWING AREAS, SOUTHERN NEBRASKA, KANSAS, OKLAHOMA, SOUTHWESTERN ARKANSAS, EASTERN TEXAS, AND WESTERN LOUISIANA FROM 111302Z - 111323Z SEP 09 DUE TO SATELLITE MAINTENANCE. Sincerely, USCG Navigation Center Navigation Information Service NAVCEN MS 7310 7323 Telegraph Road Alexandria, VA 20598 - 7310 Tel: 703-313-5900 www.navcen.uscg.gov _______________________________________________ -additional info deleted- Read it as: 21 seconds, "FROM 111302Z - 111323Z SEP 09" = "11:13:02 UTC~11:13:23 UTC, SEP 09th". You can find out how to convert here: http://en.wikipedia.org/wiki/ISO_8601#UTC Quote
+fizzymagic Posted September 9, 2009 Posted September 9, 2009 No, 21 minutes. What are the first two digits? More precisely, from 1:02pm to 1:23pm Zulu (London, England time) Septemter 11th, 2009. 11 is the day of the month. You almost had me there until I re-read the original post: FROM 111302Z - 111323Z SEP 09 DUE TO SATELLITE MAINTENANCE But a nice try. Quote
+JSWilson64 Posted September 9, 2009 Posted September 9, 2009 From http://www.navcen.uscg.gov/navinfo/Gps/Nan...?NanuId=2009058 2009058--------------------------NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2009058 SUBJ: SVN52 (PRN31) FORECAST OUTAGE RESCHEDULED 1. NANU TYPE: FCSTRESCD NANU NUMBER: 2009058 NANU DTG: 311817Z AUG 2009 REFERENCE NANU: 2009057 REF NANU DTG: 272027Z AUG 2009 SVN: 52 PRN: 31 START JDAY: 254 START TIME ZULU: 0030 START CALENDAR DATE: 11 SEP 2009 STOP JDAY: 254 STOP TIME ZULU: 1500 STOP CALENDAR DATE: 11 SEP 2009 2. CONDITION: GPS SATELLITE SVN52 (PRN31) WILL BE UNUSABLE ON JDAY 254 (11 SEP 2009) BEGINNING 0030 ZULU UNTIL JDAY 254 (11 SEP 2009) ENDING 1500 ZULU. PLEASE REFERENCE NANU NUMBER 2009057 DTG 272027Z AUG 2009 FOR THE ORIGINAL OUTAGE TIME. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV MILITARY - GPS OPERATIONS CENTER at HTTP://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541, COMM 719-567-2541, gps_support@schriever.af.mil, HTTPS://gps.afspc.af.mil MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-9994, COMM 805-606-9994, JSPOCCOMBATOPS@VANDENBERG.AF.MIL Jeez, I guess the sky really is falling. Quote
+The Blorenges Posted September 9, 2009 Posted September 9, 2009 Jeez, I guess the sky really is falling. That was my thought when I saw the topic's title. I had visions of the folks in those states all grabbing their tin hats and running for cover. The facts were rather less exciting. MrsB Quote
+mr.mudd Posted September 9, 2009 Posted September 9, 2009 Well, we have 3 stories now: 21 seconds, 21 minutes, and the latest one from 12:30am to 3pm. Which is it? Quote
FiveNines Posted September 10, 2009 Posted September 10, 2009 Read it as: 21 seconds, "FROM 111302Z - 111323Z SEP 09" = "11:13:02 UTC~11:13:23 UTC, SEP 09th". You can find out how to convert here: http://en.wikipedia.org/wiki/ISO_8601#UTC No, sorry. This is a military date/time group (DTG) as used in military messages. http://en.wikipedia.org/wiki/Date-time_group http://www.js.pentagon.mil/doctrine/jel/do...rm/d/00379.html "FROM 111302Z - 111323Z SEP 09" = "13:02 UTC - 13:23 UTC, SEP 11th, 2009". The 09 is the year, not the day. DDHHMMZ OOO YY = DD-Day, HH-Hour, MM-Minute, Z-Zulu Time (UTC), OOO-Month, YY-Year Quote
iq4u2c Posted September 10, 2009 Author Posted September 10, 2009 YES, military Date time group is what I meant and what was posted. (Im military) It's 21 minutes. And no worries for a crashing satellite! Quote
+DENelson83 Posted September 10, 2009 Posted September 10, 2009 GPS can be degraded drastically just because one satellite is taken down for maintenance? Uh-oh!!! Quote
+Chris CA Posted September 10, 2009 Posted September 10, 2009 (edited) GPS can be degraded drastically just because one satellite is taken down for maintenance? Uh-oh!!! Yes, it can but it doesn't mean it will. Edited September 10, 2009 by Chris CA Quote
+coggins Posted September 10, 2009 Posted September 10, 2009 "FROM 111302Z - 111323Z SEP 09" = "13:02 UTC - 13:23 UTC, SEP 11th, 2009". The 09 is the year, not the day. DDHHMMZ OOO YY = DD-Day, HH-Hour, MM-Minute, Z-Zulu Time (UTC), OOO-Month, YY-Year I gave another look and the NANUs do indeed use DTG and not UTC, unless there are 31 hours in a day or you are using this clock: Quote
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