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sci.geo.satellite-nav (Global Satellite Navigation) (sci.geo.satellite-nav) Discussion of global navigation satellite systems (GNSS). Topics include the technical aspects of GNSS operation, user experiences in the use of GNSS, information regarding GNSS products and discussion of GNSS policy (such as GPS selective availability).

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NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015041-42 by Sam Wormley[_2_]
2015041------------------------ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015041 SUBJ: SVN45 (PRN21) FORECAST OUTAGE JDAY 156/0300 - JDAY 156/1500 1. NANU TYPE: FCSTDV NANU NUMBER: 2015041 NANU DTG: 291507Z MAY 2015 REFERENCE NANU: N/A REF NANU DTG: N/A SVN: 45
June 3rd 15 05:34 PM
by Sam Wormley[_2_] Go to last post
0 531
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015040 by Sam Wormley[_2_]
2015040------------------------ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015040 SUBJ: SVN68 (PRN09) FORECAST OUTAGE SUMMARY JDAY 148/1400 - JDAY 148/1915 1. NANU TYPE: FCSTSUMM NANU NUMBER: 2015040 NANU DTG: 281922Z MAY 2015 REFERENCE NANU: 2015038 REF NANU DTG: 192042Z MAY 2015 SVN: 68
May 28th 15 08:56 PM
by Sam Wormley[_2_] Go to last post
0 508
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015039 -- LEAP SECOND by Sam Wormley[_2_]
2015039------------------------ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015039 SUBJ: LEAP SECOND 1. CONDITION: THE INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) HAS ANNOUNCED THE INTRODUCTION OF A LEAP SECOND TO OCCUR AT THE END OF JUN 2015. 2. COORDINATED UNIVERSAL TIME (UTC) WILL SEQUENCE AS FOLLOWS: 30 JUN 2015 23 HOURS 59 MINUTES...
May 28th 15 05:44 PM
by Sam Wormley[_2_] Go to last post
0 422
Which gps receiver should I buy? by Shiwani Gupta
I am working on a project to track human motion using inertial sensors. The initial position of inertial sensors is detected using gps. Which gps receiver should I use for this purpose? Also, I am from India so which receiver I would easily get in India for my purpose? Regards
May 19th 15 12:24 AM
by Alan Browne Go to last post
1 579
Travelling through Africa and Asia by [email protected]
Hi all, Which hand held GPS would you guys recommend? I would like to track my movements and some points of interest - especially hospitals and health clinics. Would something like the Garmin eTrex 20 Worldwide Handheld GPS Navigator be ok? I'm a novice, so will be uploading onto google maps. thanks, adi
(Multi-page thread 1 2)
April 22nd 15 08:50 AM
by Hans-Georg Michna Go to last post
10 944
Accuracy with terrible HRMS by Frank[_2_]
I am doing a large, backcountry survey for the SCDNR. A lot of the work is in deep valleys, with an HRMS of over 3. I need to have an accuracy of 2.5cm. I'm using L1 & L2C, and GPS & GLONASS. Would 30 minutes of post-processed raw data give me this kind of accuracy? If not, what length would be recommended? Thanks, Frank Looper
April 7th 15 01:36 AM
by Frank[_2_] Go to last post
2 591
Lenovo S660 CN GPS weak by Sascha Wüstemann
I am coming from "Lenovo S660 CN GPS weak" at comp.mobile.android, so readers from there might feel this a crosspost, sorry for that. A reader suggested to ask here if there is no specific answer and there is none, so I ask here. So let me cite myself: Hi everybody.
April 6th 15 08:47 PM
by Alan Browne Go to last post
1 551
ALERT: Geomagnetic K-index of 8 -- Threshold Reached: 2015 Mar 171358 UTC by Sam Wormley[_2_]
Space Weather Message Code: ALTK08 Serial Number: 18 Issue Time: 2015 Mar 17 1401 UTC ALERT: Geomagnetic K-index of 8 Threshold Reached: 2015 Mar 17 1358 UTC Synoptic Period: 1200-1500 UTC Active Warning: Yes NOAA Scale: G4 - Severe
March 18th 15 11:58 AM
by Alan Browne Go to last post
9 832
Langley’s Ionosphere Research Focus of CBC Report by Sam Wormley[_2_]
Langley’s Ionosphere Research Focus of CBC Report http://gpsworld.com/langleys-ionoshere-research-focus-of-cbc-report/ CBC News interviewed GPS World Innovation Editor Richard Langley about his ionosphere interference research project with NASA, reported on earlier this week. Langley, a professor at the University of New Brunswick, is working with the Jet Propulsion Laboratory in...
March 10th 15 06:26 PM
by Sam Wormley[_2_] Go to last post
0 562
A Milestone in Digital Mapping by Sam Wormley[_2_]
A Milestone in Digital Mapping http://gpsworld.com/a-milestone-in-digital-mapping/ Hard to believe, we have only now reached the 10th anniversary of Google Maps. As important as digital maps have become, their purpose is much the same as the printed and drawn maps that preceded them. Digital maps emerged in the 1960s with the Census Bureau’s DIME maps. These first digital maps were...
February 26th 15 08:44 PM
by Sam Wormley[_2_] Go to last post
0 526
GPS World | Obstacles in the Orbit Path of GPS III by Sam Wormley[_2_]
Obstacles in the Orbit Path of GPS III http://gpsworld.com/obstacles-in-the-orbit-path-of-gps-iii/ A Lockheed Martin vice president has stated that the first GPS III satellite will likely launch in 2017, not 2016 as had been projected in the most recent update. The company is readying the first satellite for launch availability by the end of 2015, for launch as early as the end of...
February 26th 15 12:35 AM
by Sam Wormley[_2_] Go to last post
0 549
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015010 NANU TYPE: GENERAL by Sam Wormley[_2_]
2015010------------------------ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015010 NANU TYPE: GENERAL *** GENERAL MESSAGE TO ALL GPS USERS *** On approximately 26 Feb 2015 SVN27 will resume transmitting L-band utilizing PRN26. At L-band activation, SVN27/PRN26 will be unusable until further notice. Additionally, no broadcast almanacs will include SVN27/PRN26. Future NANUs will inform users...
February 18th 15 11:35 PM
by Sam Wormley[_2_] Go to last post
0 487
Looking for NMEA data from southern latitude by [email protected]_email.edu
I would like to get some NMEA data from south of the equator. Preferably from Australia or southern South America or Africa. Somewhere around 40°S would be good but anywhere else would be usable. I would like to test a program I wrote with data from down south to check placement of the S pole marker and sat tracks. If you can collect a few hours to a couple of days data and send it, I would...
February 13th 15 08:58 AM
by rustavelli Go to last post
8 700
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015009 by Sam Wormley[_2_]
2015009------------------------ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015009 SUBJ: SVN64 (PRN30) FORECAST OUTAGE SUMMARY JDAY 037/0112 - JDAY 037/0556 1. NANU TYPE: FCSTSUMM NANU NUMBER: 2015009 NANU DTG: 060558Z FEB 2015 REFERENCE NANU: 2015008 REF NANU DTG: 302008Z JAN 2015 SVN: 64
February 6th 15 02:14 PM
by Sam Wormley[_2_] Go to last post
0 508
Magellan SkyBlazer XL by [email protected]
On Sunday, September 9, 2001 at 3:55:05 AM UTC-5, Charles N. Ede wrote: I have recently been given a Magellan SkyBlazer XL GPS, which is no longer supported by Magellan. It works, but I have no manual to teach me to use it. I also wonder if it can be used as a simple method of ground navigation, although it is an Air Navigation unit. My idea is to also get a connector to use it with...
February 4th 15 10:17 PM
by Mike[_8_] Go to last post
3 590
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015007-008 by Sam Wormley[_2_]
2015007------------------------ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015007 NANU TYPE: GENERAL *** GENERAL MESSAGE TO ALL GPS USERS *** On approximately 05 Feb 2015 SVN32 will resume transmitting L-band utilizing PRN26. At L-band activation, SVN32/PRN26 will be unusable until further notice. Additionally, no broadcast almanacs will include SVN32/PRN26 until further notice. ***...
January 30th 15 08:32 PM
by Sam Wormley[_2_] Go to last post
0 500
Leap Second in July by Sam Wormley[_2_]
INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE SERVICE DE LA ROTATION TERRESTRE DE L'IERS OBSERVATOIRE DE PARIS 61, Av. de l'Observatoire 75014 PARIS (France) Tel. : 33 (0) 1 40 51 22 26 FAX : 33 (0) 1 40 51 22 91 e-mail :
January 19th 15 03:17 PM
by oriel36[_2_] Go to last post
5 777
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015006 by Sam Wormley[_2_]
2015006------------------------ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015006 SUBJ: SVN43 (PRN13) FORECAST OUTAGE SUMMARY JDAY 009/0544 - JDAY 009/1330 1. NANU TYPE: FCSTSUMM NANU NUMBER: 2015006 NANU DTG: 091340Z JAN 2015 REFERENCE NANU: 2015001 REF NANU DTG: 021648Z JAN 2015 SVN: 43
January 9th 15 02:22 PM
by Sam Wormley[_2_] Go to last post
0 560
optimum cutoff mask by Frank[_2_]
Is there an optimum number of degrees to use in the cutoff mask? I use 5 degrees, and always kind of wonder if I may be degrading my solution by going too low. I'm setting up control points, so I need to be very accurate (~1 centimeter PP, 1 decimeter real-time). The only NTRIP caster that I have access to is 65km away, and the RTK corrections from that distance are just not as accurate as I...
December 30th 14 02:39 AM
by Frank[_2_] Go to last post
5 723
Galileo Sat 5 and 6 launched by Joop[_4_]
Today 2 new Full Operational Capability Galileo sats are launched with a Soyuz, bringing the total on 6 satellites when they are operational. In december another 2 are planned, and next year an Ariane 5 launch (4 satellites) and more soyuz launches are planned. http://spaceref.biz/agencies/esa/europes-fifth-and-six-galileo-satellites-launched.html
(Multi-page thread 1 2 3)
December 6th 14 05:02 PM
by Alan Browne Go to last post
27 1,257
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