GPS

International Symposium on GPS/GNSS 2012
September 4, 2012

International Symposium on GPS/GNSS 2012

The International Symposium on GPS/GNSS 2012 will take place on October 31, November 1 and November 2 in Xi’an, China.

The conference venue is Tianyu Gloria Grand Hotel Xian.

The event is organized by organized by College of Geology Engineering
and Geomatics, Chang’an University, the International Association of
Chinese Professionals in Global Positioning Systems (CPGPS) and the
National Time Service Center, Chinese Academy of Sciences.

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By Inside GNSS
Vector Delay Lock Loops
September 3, 2012

Vector Delay Lock Loops

GNSS receivers determine their position and clock bias by measuring the arrival times of satellite signals. Delay lock loops (DLLs) are used in traditional receivers to measure the arrival times of the signals.

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By Inside GNSS
GPS Civil Funding

GPS Civil Funding

The Federal Aviation Administration (FAA) has told those awaiting their slice of the GPS civil program budget that the funds are on the way.

The money, which is supposed to support that portion of the GPS program springing from the needs of civilian users, has been held up for months. In fact, as of late August — with less than 40 days left to go in the fiscal year — the money had not been transferred to either the military’s GPS Directorate or the National Coordination Office (NCO) for Space-Based Positioning, Navigation, and Timing (PNT).

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By Dee Ann Divis
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Improving GNSS Attitude Determination

Improving GNSS Attitude Determination

This article describes an integration of a single-frequency GNSS, two-antenna heading system with low-cost inertial and magnetic field sensors in order to improve the availability and reliability of pure GNSS attitude determination. This method calculates a redundant attitude solution in an error-state Kalman filter using different sensor setups. As a result, the process of carrier phase ambiguity resolution accelerates.

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By Inside GNSS
Spoofs, Proofs & Jamming

Spoofs, Proofs & Jamming

TABLE 1. Spoofer antenna requirements for various hardened GPS signal types

“Here is Edward Bear, coming downstairs now, bump, bump, bump, on the back of his head, behind Christopher Robin. It is, as far as he knows, the only way of coming downstairs, but sometimes he feels that there really is another way, if only he could stop bumping for a moment and think of it. And then he feels that perhaps there isn’t.”
– A.A. Milne, Winnie-the-Pooh

Is our faith in the integrity and infallibility of the Global Positioning System misplaced or, perhaps, insufficiently grounded?

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By Inside GNSS
ESA GNSS Propagation Course 2012

ESA GNSS Propagation Course 2012

El Centro Europeo de Astronomía Espacial (ESAC)

Organized by the European Space Agency with the collaboration of a number of national space organizations, this intensive course will cover GNSS error sources related to radiowave propagation and interference effects.

It is aimed at engineers, geodesists, physicists and advanced students with appropriate degrees and a knowledge of GNSS fundamentals, statistics and signal processing.

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By Inside GNSS
PTTI 2012: Precise Time and Time Interval Systems and Applications Meeting
September 1, 2012

PTTI 2012: Precise Time and Time Interval Systems and Applications Meeting

The 44rd PTTI systems and applications meeting and industry exhibit will be held at the Hyatt Regency Reston Town Center in Reston, Virginia on November 26-29, 2012.

PTTI 2012 will address time and frequency standards; time transfer theory, techniques and applications; PTTI in current applications; atomic and advanced clocks; time scales, algorithms and methods; GNSS receivers timing and calibration; military applications; and novel applications using PTTI.

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By Inside GNSS
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ION’s Big Year! GNSS 2012 Plus a New Pacific Rim Conference
August 31, 2012

ION’s Big Year! GNSS 2012 Plus a New Pacific Rim Conference

Marriott Waikiki Beach

It’s a big year for the Institute of Navigation, with the venerable ION GNSS 2012 happening this September in Nashville and the new and highly anticipated Pacific PNT conference opening for the first time next April in Honolulu.

ION GNSS 2012, the granddaddy of all GNSS events, begins shortly in Music City, USA: Nashville, Tennessee.

It’s scheduled during the third week of September at the downtown Nashville Convention Center, a five minute walk to the Country Music Hall of Fame and other attractions.

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By Inside GNSS
11th Annual Open Mic Night Hosted by NavtechGPS
August 29, 2012

11th Annual Open Mic Night Hosted by NavtechGPS

NavtechGPS will host its 11th Annual Open Mic Night on Thursday, Sept. 20, 2012, from 8 p.m. to midnight during the ION GNSS 2012 conference at none other than the well-known Cannery Ballroom at the Mercy Lounge on Cannery Row. This musical evening will include performances by ION’s own Augmentations — complete with back-up singers, the Pseudorandom Noise, together with other talented folks from the conference. In addition to live music and a night of fun and Karaoke, five $100 cash prizes will be raffled off.

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By Inside GNSS
GNSS Hotspots | August 2012

GNSS Hotspots | August 2012

One of 12 magnetograms recorded at Greenwich Observatory during the Great Geomagnetic Storm of 1859
1996 soccer game in the Midwest, (Rick Dikeman image)
Nouméa ground station after the flood
A pencil and a coffee cup show the size of NASA’s teeny tiny PhoneSat
Bonus Hotspot: Naro Tartaruga AUV
Pacific lamprey spawning (photo by Jeremy Monroe, Fresh Waters Illustrated)
“Return of the Bucentaurn to the Molo on Ascension Day”, by (Giovanni Antonio Canal) Canaletto
The U.S. Naval Observatory Alternate Master Clock at 2nd Space Operations Squadron, Schriever AFB in Colorado. This photo was taken in January, 2006 during the addition of a leap second. The USNO master clocks control GPS timing. They are accurate to within one second every 20 million years (Satellites are so picky! Humans, on the other hand, just want to know if we’re too late for lunch) USAF photo by A1C Jason Ridder.
Detail of Compass/ BeiDou2 system diagram
Hotspot 6: Beluga A300 600ST

1. PAPER CUTS
Washington, Oklahoma, Ohio, Georgia, Pennsylvania
√ State transportation departments in Georgia, Pennsylvania, Oklahoma, and Ohio are printing fewer state highway maps, says the Associated Press. Washington did away with them entirely. Blame it on the double whammy of public sector budget cuts and smartphone, handheld, and in-car GPS. But there are lots of holdouts. As one Indiana man said, without a paper map, “You’re beholden to the GPS lady, you know?”

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By Inside GNSS
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