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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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Use of GPS signal propagation for weather forecasts by Alan Browne
http://bits.blogs.nytimes.com/2013/03/28/a-marshall-mcluhan-approach-to-weather-forecasting/?ref=technology or http://tinyurl.com/c2a35e9 (Has this come up here before?). -- "There were, unfortunately, no great principles on which parties
March 28th 13 10:02 PM
by Alan Browne Go to last post
0 336
Physicists Debate the Many Varieties of Nothingness by Sam Wormley[_2_]
Physicists Debate the Many Varieties of Nothingness http://blogs.scientificamerican.com/observations/2013/03/22/physicists-debate-the-many-varieties-of-nothingness/ What is nothing? Sounds like a simple question—nothing is simply the absence of something, of course—until you begin to think about it. The other night the American Museum of Natural History hosted its 14th annual Asimov...
March 23rd 13 05:13 PM
by Sam Wormley[_2_] Go to last post
0 378
Air Force Announces Plans for L2C, L5 CNAV Message Tests by Sam Wormley[_2_]
Air Force Announces Plans for L2C, L5 CNAV Message Tests http://www.insidegnss.com/node/3459 The U.S. Air Force Space Command (AFSPC) invited comments today (March 20, 2013) on its proposed plans to test CNAV message capabilities on the GPS L2C and L5 signals June 15–29. The signals are part of the GPS modernization program and will provide, among other things, greater capability...
March 20th 13 10:01 PM
by Sam Wormley[_2_] Go to last post
0 339
The 2014 Rolls-Royce Wraith coupe is using GPS to make a smooth rideeven smoother by Sam Wormley[_2_]
The 2014 Rolls-Royce Wraith coupe is using GPS to make a smooth ride even smoother http://www.gpsworld.com/rolls-royce-wraith-selects-gears-using-gps/ The 2014 Rolls-Royce Wraith coupe is using GPS to make a smooth ride even smoother. Unveiled at the 2013 Geneva Motor Show, the Wraith is the fastest, most powerful car Rolls-Royce has ever made at $320,000 ($245,000
March 16th 13 12:09 PM
by Alan Browne Go to last post
8 548
Chinese paranoia by Alan Browne
http://www.nytimes.com/2013/03/15/business/global/coca-cola-cooperating-with-chinese-gps-investigation.html?ref=business or http://tinyurl.com/clgabp8 -- "There were, unfortunately, no great principles on which parties were divided – politics became a mere struggle for office." -Sir John A. Macdonald
March 14th 13 09:35 PM
by Alan Browne Go to last post
0 386
When Am I?: The Importance of Time in Navigation by Sam Wormley[_2_]
When Am I?: The Importance of Time in Navigation http://www.gpsworld.com/when-am-i-the-importance-of-time-in-navigation/
March 14th 13 07:41 AM
by oriel36[_2_] Go to last post
2 416
First Galileo-Only Position Fix Performed! by Sam Wormley[_2_]
First Galileo-Only Position Fix Performed! http://www.gpsworld.com/first-galileo-only-position-fix-performed/ Entitling its release “From Orbit with Love,” the European Space Agency (ESA) proudly announced today, March 12, 2013, that the first four satellites of the future Galileo Satellite Navigation constellation achieved their first-ever autonomous position fix. The positioning...
March 12th 13 09:18 PM
by Alan Browne Go to last post
1 426
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013020 by Sam Wormley[_2_]
2013020------------------------ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013020 SUBJ: SVN43 (PRN13) FORECAST OUTAGE SUMMARY JDAY 065/1952 - JDAY 066/0117 1. NANU TYPE: FCSTSUMM NANU NUMBER: 2013020 NANU DTG: 070126Z MAR 2013 REFERENCE NANU: 2013019 REF NANU DTG: 282138Z FEB 2013 SVN: 43
March 7th 13 01:57 AM
by Sam Wormley[_2_] Go to last post
0 351
Getting around the 'uncertainty principle': Physicists make firstdirect measurements of polarization states of light by Sam Wormley[_2_]
Getting around the 'uncertainty principle': Physicists make first direct measurements of polarization states of light Researchers at the University of Rochester and the University of Ottawa have applied a recently developed technique to directly measure for the first time the polarization states of light. Their work both overcomes some important challenges of Heisenberg's famous ...
March 4th 13 05:08 PM
by Sam Wormley[_2_] Go to last post
0 385
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013019 by Sam Wormley[_2_]
2013019------------------------ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013019 SUBJ: SVN43 (PRN13) FORECAST OUTAGE JDAY 065/1930 - JDAY 066/0730 1. NANU TYPE: FCSTDV NANU NUMBER: 2013019 NANU DTG: 282138Z FEB 2013 REFERENCE NANU: N/A REF NANU DTG: N/A SVN: 43 PRN: 13
February 28th 13 11:48 PM
by Sam Wormley[_2_] Go to last post
0 302
GPS and GLONASS: "Dual-core" location for your phone by miso
On 2/12/2013 7:54 PM, Sam Wormley wrote: GPS and GLONASS: "Dual-core" location for your phone http://www.youtube.com/watch?v=gB9pXInwh3k List of Smartphones using assisted GPS and GLONASS (need references) http://en.wikipedia.org/wiki/List_of_Smartphones_using_GLONASS_Navigation I guess it would be nice to see if any of these phones with Glonass are more accurate than plain GPS. I...
February 28th 13 10:39 PM
by Alan Browne Go to last post
7 559
New Organization Advocates for GPS Industry by Sam Wormley[_2_]
New Organization Advocates for GPS Industry http://www.gpsworld.com/new-org-raises-gps-industry-banner-in-d-c/ A new group, the GPS Innovation Alliance, has formed and announced itself as the voice of the U.S. GPS industry and community of users, to “support the ever-increasing importance of GPS” in the U.S. capital, Washington, D.C. The organization subsumes and replaces both the...
February 27th 13 07:14 PM
by Sam Wormley[_2_] Go to last post
0 284
90-minute Web Seminar: GNSS and Unmanned Aerial Systems:,The RoadAhead by Sam Wormley[_2_]
GNSS and Unmanned Aerial Systems: The Road Ahead http://campaign.r20.constantcontact.com/render?llr=cpuegidab&v=001p_xH-twv5vXYc50CQTU1Oats3S_VXAwVbEHciLT5EFmBWe3tQTHZOQAr_yBDQAn0ALyoIIOS3YqBEnWwOyh_AMO3Iz5jZcW2nW7vKArbvvA%3D Join Inside GNSS and Trimble THURSDAY MARCH 14 for a free 90-minute web seminar
February 27th 13 02:10 AM
by Sam Wormley[_2_] Go to last post
0 395
Qualcomm Announces 4G LTE Advanced Connectivity Platform for MobileComputing by Sam Wormley[_2_]
Qualcomm Announces 4G LTE Advanced Connectivity Platform for Mobile Computing http://www.gpsworld.com/qualcomm-announces-4g-lte-advanced-connectivity-platform-for-mobile-computing/ Qualcomm Technologies, Inc., has announced the industry’s first 4G LTE Advanced embedded data connectivity platform for mobile computing devices, including thin form factor laptops, tablets and ...
February 26th 13 10:09 PM
by Sam Wormley[_2_] Go to last post
0 257
Air Force Awards Lockheed Martin Contracts for Next Set of GPS IIISatellites by Sam Wormley[_2_]
Air Force Awards Lockheed Martin Contracts for Next Set of GPS III Satellites http://www.gpsworld.com/air-force-awards-lockheed-martin-contracts-for-next-set-of-gps-iii-satellites/ The U.S. Air Force has awarded Lockheed Martin two fixed-price contracts totaling $120 million to procure long lead parts for the fifth, sixth, seventh and eighth next-generation GPS III satellites. The...
February 26th 13 10:06 PM
by Sam Wormley[_2_] Go to last post
0 299
15mm elevation resolution from space!? by miso
OK, it can detect a 15mm change in elevation. So I assume that is resolution, not accuracy. We need more anal retentive people to write science blogs. ;-) http://arstechnica.com/science/2013/02/earthquakes-booms-big-enough-to-be-detected-from-orbit/ For fun and no profit, you can turn on the earthquake feature of google earth. There are some spots that are just littered with small quakes...
February 26th 13 04:23 AM
by miso Go to last post
0 453
Viewpoint: Free-Falling Interferometry by Sam Wormley[_2_]
Viewpoint: Free-Falling Interferometry http://physics.aps.org/articles/v6/23 Atom interferometry in free fall demonstrates fundamental quantum physics and a new level of technology readiness for future experiments in space. At nanokelvin temperatures, Bose-Einstein condensates (BECs) of dilute atomic gases are quantum to the core. In a paper in Physical Review Letters,...
February 25th 13 10:31 PM
by Sam Wormley[_2_] Go to last post
0 285
Fun: GPS, relativity, and nuclear detection by Sam Wormley[_2_]
Fun: GPS, relativity, and nuclear detection http://www.youtube.com/watch?v=ky4RgRvVDoA
February 25th 13 09:04 AM
by hanson Go to last post
1 353
Researchers See Ionospheric Signature of North Korean Nuclear Test by Sam Wormley[_2_]
Researchers See Ionospheric Signature of North Korean Nuclear Test http://www.gpsworld.com/researchers-see-ionospheric-signature-of-north-korean-nuclear-test/ The explosion of an underground nuclear device by North Korea this week disturbed the Earth’s ionosphere. The blast generated infrasonic waves that propagated all the way to the upper atmosphere causing small variations in the...
February 20th 13 05:39 PM
by Sam Wormley[_2_] Go to last post
0 263
GPS and GLONASS: "Dual-core" location for Smartyour by Sam Wormley[_2_]
GPS and GLONASS: "Dual-core" location for your phone http://www.youtube.com/watch?v=gB9pXInwh3k List of Smartphones using assisted GPS and GLONASS (need references) http://en.wikipedia.org/wiki/List_of_Smartphones_using_GLONASS_Navigation The less time your smartphone spends searching for satellites, the faster you can start using your location-based services. Qualcomm’s ...
February 13th 13 04:06 AM
by Sam Wormley[_2_] Go to last post
0 261
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