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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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NO JOKE ----- this is the reason we have Gravity by fitz
NO JOKE ----- this is the reason we have Gravity A correct theory of gravity will show us these four (4) things: 1. It will show us why gravity also acts like acceleration (principle of equvalence). 2. It will show us the actual cause of gravity. 3. It will show us why gravitational mass and inertial mass are identical. 4. It will show us the speed of gravitational attraction.
Yesterday 07:42 AM
by fitz Go to last post
0 3
R.I.P. iGuidance PPC, but iGuidance PC is alive and well by Marvin Hlavac
iGuidance PPC is now a discontinued software. The PC version however is still alive. A new iGuidance 2011 will release soon. http://www.laptopgpsworld.com/blog/316-r-i-p-iguidance-ppc-long-live-iguidance-pc
September 2nd 10 09:10 PM
by Marvin Hlavac Go to last post
0 3
Auto/Hiking Model by Rich[_3_]
Hi, Just wondering if anyone knows of a model that's good for highway navigation, and is good for hiking too? Does any such model exist? Thanks
(Multi-page thread 1 2)
September 2nd 10 12:28 AM
by Wayne R. Go to last post
14 28
GPS World: Air Force Reorganization May Drastically Affect GPS Program by Sam Wormley[_2_]
Air Force Reorganization May Drastically Affect GPS Program http://www.gpsworld.com/gnss-system/gps-modernization/news/air-force-reorganization-may-drastically-affect-gps-program-10413 The U.S. Department of Defense has totally revamped the USAF portion of National Security Space. A communiqué on this subject has appeared, signed by the Under Secretary for the Air Force, although the changes...
September 1st 10 12:51 AM
by Sam Wormley[_2_] Go to last post
0 16
Did something roll over on about Aug 19th ? by spam_from_google@chezphil.org
Hi Everyone, My Sony GPS-CS1 has been misbehaving since Aug 19th. Since then it has been recording dates in April 2030. It looks as if it is adding 0x1c00 days to the dates that it is recording. Is anyone aware of some sort of roll-over in the GPS date format that could have triggered this? Is there anyone else with this device (or another device - I bet that
(Multi-page thread 1 2)
August 30th 10 10:22 PM
by spam_from_google@chezphil.org Go to last post
10 22
IS-GPS-200E: Flexing Power and Fixing Phase Ambiguities by Sam Wormley[_2_]
IS-GPS-200E: Flexing Power and Fixing Phase Ambiguities http://www.insidegnss.com/node/2285 High-precision users of GNSS are used to solving for carrier phase integer ambiguities, but the recent publication of a GPS technical document has fixed a different kind of phase ambiguity — a linguistic one: the difference between “shall” and “can.” The devil, as the old adage goes, is in the...
August 28th 10 11:20 PM
by Sam Wormley[_2_] Go to last post
0 13
SVN62, the First GPS IIF Satellite, Is Set Healthy by Sam Wormley[_2_]
SVN62, the First GPS IIF Satellite, Is Set Healthy http://www.insidegnss.com/node/2286 The U.S. Air Force declared the first GPS Block IIF satellite (SVN62) operational today (August 27, 2010), changing the spacecraft's navigation signal status to healthy at about 10:10 a.m. (EDT or 4:10 a.m. UTC). For more, see: http://www.insidegnss.com/node/2286
August 28th 10 11:18 PM
by Sam Wormley[_2_] Go to last post
0 17
GPS Landing Approaches by Ed M.
Story in the NY Times about a GPS approach to Hartford CN airport: http://www.nytimes.com/2010/08/27/business/27air.html The approach that they flew: http://aeronav.faa.gov/d-tpp/1008/00460R15.PDF The opposite runway approach:
August 28th 10 04:40 PM
by Ed M. Go to last post
0 11
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2010113 by Sam Wormley[_2_]
Ref: http://www.navcen.uscg.gov/gps/geninfo/NANUabbr.htm http://celestrak.com/GPS/NANU/2010/ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2010113 SUBJ: SVN62 (PRN25) USABLE JDAY 239/0410 1. NANU TYPE: USABINIT NANU NUMBER: 2010113 NANU DTG: 270416Z AUG 2010 REFERENCE NANU: N/A
August 27th 10 04:45 AM
by Sam Wormley[_2_] Go to last post
0 20
Where the Action Is by Sam Wormley[_2_]
Where the Action Is http://www.gpsworld.com/gnss-system/where-action-is-10402 August 25, 2010 By: Alan Cameron GNSS Design & Test Newsletter, August 2010 Name the hottest test-bed for interoperability of multiple GNSS in user applications.
August 26th 10 12:33 AM
by Sam Wormley[_2_] Go to last post
0 21
High-Integrity Global Positioning at Issue as Congress Works Through2011 GPS Funding by Sam Wormley[_2_]
High-Integrity Global Positioning at Issue as Congress Works Through 2011 GPS Funding BY: GLEN GIBBONS Inside GNSS 19 August, 2010 GPS-related procurement and development items in President Obama's proposed budget for fiscal year 2011 are moving through Capitol Hill, but not without contention. At issue is Obama's request for $40.9 million for the High-Integrity Global Position...
August 24th 10 06:58 PM
by Sam Wormley[_2_] Go to last post
0 15
GPS World: Four Months with the Apple iPad: Where Do We Stand? by Sam Wormley[_2_]
Four Months with the Apple iPad: Where Do We Stand? http://www.gpsworld.com/gis/gss-weekly/four-months-with-apple-ipad-where-do-we-stand-10367 August 18, 2010 By: Eric Gakstatter It’s been four months since Apple began shipping the iPad. Last spring, I wrote that it was imperative that the consumer market accept the iPad for it to have a chance to have an impact in the geospatial industry....
August 18th 10 07:25 PM
by Sam Wormley[_2_] Go to last post
0 23
StreetPilot 2610 by Steve[_6_]
I have a Garmin StreetPilot 2610, barely used, in original box plus amplified MCX antenna. Anyone interested? Not sure what this thing is going for these days...
August 16th 10 10:51 AM
by Don B Go to last post
1 21
Pikes Peak or Bust by Ed M.
http://www.scientificamerican.com/article.cfm?id=self-driving-audi-automobile "In September a driverless Audi TTS will speed to the top of Colorado's Pikes Peak at just under 100 kilometers per hour . . . The car will be guided by a differential GPS system . . . exact enough to keep the car within 1.5 centimeters of its course." This story has been around the web since at least last summer...
August 15th 10 11:41 PM
by Ed M. Go to last post
0 26
SVN62 placement by macpacheco
Looking at FAA's WAAS Satellite Status page, it looks like the new IIF SV1 (SVN62/PRN 25) satellite is right on top of PRN30/SVN30. http://www.nstb.tc.faa.gov/incoming/waas_sats.png Considering: 1 - There's already PRN12 close by (about 10 degrees forward in the same orbital plane) 2 - The current constellation optimization effort Then why not position SVN62 halfway or so between PRN12/SVN58 and
August 12th 10 12:03 AM
by macpacheco Go to last post
4 46
Beidou/Compass Satellite Achieves Geosynchronous Orbit with inclination of 55.06° by Sam Wormley[_2_]
Beidou/Compass Satellite Achieves Geosynchronous Orbit http://www.gpsworld.com/gnss-system/compass/news/beidoucompass-satellite-achieves-geosynchronous-orbit-10315 August 5, 2010 News courtesy of CANSPACE Listserve The first Beidou/Compass inclined geosynchronous orbit (IGSO) satellite has achieved geosynchronous orbit. The satellite was launched on July 31 from the Xichang Satellite Launch...
August 11th 10 04:17 AM
by eric gisse Go to last post
8 33
Nissan sat nav by housetrained
How do I update the SD card in the Nissan Note Sat-Nav? TIA -- John the West Ham fan
August 10th 10 12:48 AM
by ED Go to last post
1 36
GNSS COLLABORATION BETWEEN THE EU AND US by Sam Wormley[_2_]
August 2, 2010 GNSS COLLABORATION BETWEEN THE EU AND US United States and European Union Announce Collaboration on the Use of Global Navigation Satellite Systems U.S. Department of State Press Release 30 July, 2010 The following is a joint statement on cooperation between the U.S. Global Positioning
August 8th 10 02:45 AM
by Sam Wormley[_2_] Go to last post
0 48
Solar activity may cause problems this week by Sam Wormley[_2_]
Solar activity may cause problems this week http://isc.sans.org/diary.html?n&storyid=9322
August 5th 10 08:42 AM
by Harald Hanche-Olsen Go to last post
9 39
Techniques to use both L1 and L2 by Johnson[_2_]
Techniques to use both L1 and L2 are fundamental to high-grade GPS receivers, and I believe the patents related actually protect this small community to grow under the canopy of low-cost GPS receivers. I remembered many years ago I was told that the techniques could be roughly divided into 5 categories: 1. Completely codeless. 2. Squaring 3. code-aided squaring 4. cross-correlation (by...
August 4th 10 05:21 AM
by macpacheco Go to last post
3 68
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