Jump to content

Satellite going down


iq4u2c
Followers 2

Recommended Posts

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

Link to comment

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. :lol:

Link to comment

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

Link to comment

"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:

1_38ea5f194eb5550091db24d2d63d1df6.jpg

Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Followers 2
×
×
  • Create New...