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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) 2013048 by Sam Wormley[_2_]
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013048 SUBJ: SVN55 (PRN15) FORECAST OUTAGE SUMMARY JDAY 232/1301 - JDAY 232/1942 1. NANU TYPE: FCSTSUMM NANU NUMBER: 2013048 NANU DTG: 201948Z AUG 2013 REFERENCE NANU: 2013047 REF NANU DTG: 152155Z AUG 2013 SVN: 55 PRN: 15
August 21st 13 01:46 AM
by Sam Wormley[_2_] Go to last post
0 302
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013043-44 by Sam Wormley[_2_]
2013043------------------------ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013043 SUBJ: SVN39 (PRN9) FORECAST OUTAGE JDAY 225/0715 - JDAY 226/0715 1. NANU TYPE: FCSTDV NANU NUMBER: 2013043 NANU DTG: 082007Z AUG 2013 REFERENCE NANU: N/A REF NANU DTG: N/A SVN: 39
August 8th 13 11:13 PM
by Sam Wormley[_2_] Go to last post
0 626
Focus: Colliding Grains Make Stronger Sandstorms by Sam Wormley[_2_]
Focus: Colliding Grains Make Stronger Sandstorms http://physics.aps.org/articles/v6/86 Midair collisions between grains in a sandstorm drastically increase the strength of the storm, according to simulations, suggesting a central role for collisions. In a sandstorm, midair collisions between particles dramatically increase the flow of grains within the storm, rather than...
August 5th 13 02:47 PM
by Hans-Georg Michna Go to last post
3 418
I don't need no stinkin' GPS - I got grid cells! by Alan Browne
http://www.nytimes.com/2013/08/06/science/navigational-cell-systems-located-in-human-brains.html?hp or https://tinyurl.com/mubzywm -- "Political correctness is a doctrine, fostered by a delusional, illogical minority, and rapidly promoted by mainstream media, which holds forth the proposition that it is entirely possible to pick up a piece of **** by the clean end." ...
August 4th 13 05:35 PM
by Alan Browne Go to last post
0 299
U.S. Air Force Squeezing Extra Life from GPS Satellites by Sam Wormley[_2_]
http://www.ngs.noaa.gov/CORS/news.shtml FROM THE NEWS U.S. Air Force Squeezing Extra Life from GPS Satellites BY: MIKE GRUSS Space News 26 July 2013 The U.S. Air Force's intensifying scramble to do more with less in difficult
August 2nd 13 09:27 PM
by Alan Browne Go to last post
1 412
Get Back, Loretta: DARPA Seeks to Eliminate GPS Dependence by Sam Wormley[_2_]
Get Back, Loretta: DARPA Seeks to Eliminate GPS Dependence http://www.gpsworld.com/get-back-loretta-darpa-seek-to-eliminate-gps-dependence/ Call it irony, poetic justice, or just the nature of the beast. The same impulse that led to the invention of GPS now has engendered a drive to beget non-GPS. In the 1970s, the U.S. military began putting together a program “to drop five bombs...
August 2nd 13 09:21 PM
by Alan Browne Go to last post
1 333
Satelles Announces Patent and Technology License Agreement with Boeing by Sam Wormley[_2_]
Satelles Announces Patent and Technology License Agreement with Boeing http://www.gpsworld.com/satelles-announces-patent-and-technology-license-agreement-with-boeing/ Satelles, a division of iKare Corporation, has entered into a patent and technology license agreement with The Boeing Company. This license allows Satelles to provide timing and location solutions to commercial markets...
July 30th 13 07:06 PM
by Sam Wormley[_2_] Go to last post
0 316
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013041 by Sam Wormley[_2_]
2013041------------------------ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013041 SUBJ: SVN58 (PRN12) FORECAST OUTAGE JDAY 205/1715 - JDAY 206/0515 1. NANU TYPE: FCSTDV NANU NUMBER: 2013041 NANU DTG: 191505Z JUL 2013 REFERENCE NANU: N/A REF NANU DTG: N/A SVN: 58
July 19th 13 04:09 PM
by Sam Wormley[_2_] Go to last post
0 298
Why is light slower in glass? - Sixty Symbols by Sam Wormley[_2_]
Why is light slower in glass? - Sixty Symbols http://www.youtube.com/watch?v=CiHN0ZWE5bk
July 17th 13 08:35 AM
by J. J. Lodder Go to last post
2 386
Lockheed Martin Delivers Antenna Assemblies for First GPS III Satellite by Sam Wormley[_2_]
Lockheed Martin Delivers Antenna Assemblies for First GPS III Satellite http://www.gpsworld.com/lockheed-martin-delivers-antenna-assemblies-for-first-gps-iii-satellite/ Seven antenna assemblies, produced at Lockheed Martin’s Newtown, Pennsylania, facility were delivered to the company’s GPS III Processing Facility (GPF) near Denver, Colorado, on June 14. The antennas will be installed...
July 16th 13 08:47 PM
by Sam Wormley[_2_] Go to last post
0 266
Parts installed “upside down” caused Russian rocket to explode last week by Sam Wormley[_2_]
Parts installed “upside down” caused Russian rocket to explode last week http://arstechnica.com/science/2013/07/parts-installed-upside-down-caused-last-weeks-russian-rocket-to-explode/ Each of those sensors had an arrow that was suppose to point toward the top of the vehicle, however multiple sensors on the failed rocket were pointing downward instead. As a result, the flight control ...
July 16th 13 08:26 PM
by Joop[_3_] Go to last post
6 512
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013040 by Sam Wormley[_2_]
2013040------------------------ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013040 SUBJ: SVN26 (PRN26) FORECAST OUTAGE SUMMARY JDAY 192/1612 - JDAY 192/2227 1. NANU TYPE: FCSTSUMM NANU NUMBER: 2013040 NANU DTG: 112231Z JUL 2013 REFERENCE NANU: 2013039 REF NANU DTG: 081626Z JUL 2013 SVN: 26
July 12th 13 03:36 AM
by Sam Wormley[_2_] Go to last post
0 306
NO leap second will be introduced at the end of December 2013 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 OBSERVATOIRE DE PARIS 61, Av. de l'Observatoire 75014 PARIS (France) Tel. : 33 (0) 1 40 51 22 29 FAX : 33 (0) 1 40 51 22 91
July 8th 13 09:13 PM
by oriel36[_2_] Go to last post
1 358
Remembering: Air Force Delta II rocket explodes 13 seconds afterliftoff at Cape Canaveral Air Station. (Jan/1997) by Sam Wormley[_2_]
Remembering: Air Force Delta II rocket explodes 13 seconds after liftoff at Cape Canaveral Air Station. (Jan/1997) http://www.youtube.com/watch?v=z_aHEit-SqA
July 6th 13 06:57 PM
by J. J. Lodder Go to last post
2 388
Congress Slashes Civil GPS Funding by Sam Wormley[_2_]
Congress Slashes Civil GPS Funding http://www.insidegnss.com/node/3615 In a set of decisions that could potentially slow GPS modernization both the House and Senate Appropriations Committees this week slashed funding for the civil community’s contribution to the GPS system from the Fiscal Year 2014 (FY14) budget. The House eliminated the entire amount of the White House budget
(Multi-page thread 1 2)
July 4th 13 05:27 PM
by Marcelo Pacheco Go to last post
19 782
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013038 NANU TYPE: GENERAL by Sam Wormley[_2_]
2013038------------------------ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013038 NANU TYPE: GENERAL *** GENERAL MESSAGE TO ALL GPS USERS *** The purpose of this notification is to inform users that the L2C and L5 CNAV message testing announced in NANU 2013034 is complete. Any military or civil users who encountered user equipment problems during this period should contact the GPSOC...
July 1st 13 09:55 PM
by Sam Wormley[_2_] Go to last post
0 260
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013036-37 by Sam Wormley[_2_]
2013036------------------------ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013036 SUBJ: SVN33 (PRN3) UNUSABLE JDAY 181/1634 - UNTIL FURTHER NOTICE 1. NANU TYPE: UNUSUFN NANU NUMBER: 2013036 NANU DTG: 301618Z JUN 2013 REFERENCE NANU: N/A REF NANU DTG: N/A SVN: 33
June 30th 13 07:27 PM
by Sam Wormley[_2_] Go to last post
0 293
Homeland Security's National Risk Estimate on GPS Disruption: Stilla Lot of Unknowns by Sam Wormley[_2_]
Homeland Security's National Risk Estimate on GPS Disruption: Still a Lot of Unknowns http://www.insidegnss.com/node/3613 The U.S. Department of Homeland Security has released an abbreviated fact sheet and a summary report on its evaluation of the risks to U.S. critical infrastructure from GPS disruptions. The unsurprising “bottom line,” as the public summary put it: “U.S. ...
June 28th 13 09:57 PM
by Sam Wormley[_2_] Go to last post
0 342
Harnessing the potential of quantum tunneling: Transistors withoutsemiconductors by Sam Wormley[_2_]
Harnessing the potential of quantum tunneling: Transistors without semiconductors http://phys.org/news/2013-06-harnessing-potential-quantum-tunneling-transistors.html "Imagine that the nanotubes are a river, with an electrode on each bank. Now imagine some very tiny stepping stones across the river," said Yap. "The electrons hopped between the gold stepping stones. The stones are so...
June 25th 13 02:27 AM
by Sam Wormley[_2_] Go to last post
0 487
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013035 by Sam Wormley[_2_]
2013035------------------------ NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013035 SUBJ: SVN66 (PRN27) USABLE JDAY 172/1958 1. NANU TYPE: USABINIT NANU NUMBER: 2013035 NANU DTG: 212002Z JUN 2013 REFERENCE NANU: N/A REF NANU DTG: N/A SVN: 66
June 22nd 13 03:48 AM
by [email protected] Go to last post
1 373
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