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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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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 06:35 PM
by Alan Browne Go to last post
0 277
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 10:27 PM
by Alan Browne Go to last post
1 388
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 10:21 PM
by Alan Browne Go to last post
1 301
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 08:06 PM
by Sam Wormley[_2_] Go to last post
0 292
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 05:09 PM
by Sam Wormley[_2_] Go to last post
0 279
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 09:35 AM
by J. J. Lodder Go to last post
2 366
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 09:47 PM
by Sam Wormley[_2_] Go to last post
0 244
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 09:26 PM
by Joop[_3_] Go to last post
6 453
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 04:36 AM
by Sam Wormley[_2_] Go to last post
0 273
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 10:13 PM
by oriel36[_2_] Go to last post
1 334
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 07:57 PM
by J. J. Lodder Go to last post
2 331
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 06:27 PM
by Marcelo Pacheco Go to last post
19 710
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 10:55 PM
by Sam Wormley[_2_] Go to last post
0 242
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 08:27 PM
by Sam Wormley[_2_] Go to last post
0 276
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 10:57 PM
by Sam Wormley[_2_] Go to last post
0 317
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 03:27 AM
by Sam Wormley[_2_] Go to last post
0 465
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 04:48 AM
by [email protected] Go to last post
1 344
SVN66 checkout completed Jun 13th by [email protected]
http://www.afspc.af.mil/news/story.asp?id=123352105 This is excellent precedent. Internal GPS related processes evolving at a brisk pace. But one week later still not healthy, perhaps waiting the end of the L2C/L5 testing activity ? Trying to estimate next bird to be retired. From a on orbit performance, it looks like 16yr old SVN38/PRN8 is the next to go - 120cm RMS URE performance. However...
June 21st 13 12:18 AM
by [email protected] Go to last post
0 245
Will Saudi Arabia begin to sink or settle? - read905ew by [email protected]
Will Saudi Arabia's central land mass begin to sink because of massive ground water removal? The question needs to be asked. After studying information showing the amount of ground water removed up until this post, to be equal to the size of Lake Erie, and that it was removed in just over a decade, there must be some very large empty spaces below ground throughout Saudi Arabia. The pumping wells...
June 12th 13 08:34 PM
by [email protected] Go to last post
1 451
Progeny MLAT by miso
Yeah I know, it isn't satellite. But probably of interest. http://transition.fcc.gov/Daily_Releases/Daily_Business/2013/db0606/FCC-13-78A1.txt Progeny, a multilateration location and monitoring service (“M-LMS”) licensee, plans to deploy a highly accurate location service, which it states will provide both precise outdoor and in-building location information, including improved delivery of...
June 9th 13 02:45 AM
by miso Go to last post
7 872
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