GNSS

Lockheed Martin Completes GPS III Flight Software Milestone

February 6, 2013By
GPS-III-AHI-O

The Lockheed Martin team developing the U.S. Air Force’s next generation Global Position System III satellites has completed a key flight software milestone validating the software’s ability to provide reliable and effective command and control for the GPS III satellites planned for launch into orbit. The GPS III program will affordably replace aging GPS satellites, while improving capability to meet... read more

This article is tagged with , , and posted in GNSS News, GPS Modernization, Latest News

Symmetricom Enhances SSU 2000 Platform with GLONASS

February 5, 2013By

Symmetricom, Inc. today announced two new capabilities for its SSU 2000 Synchronization Supply Unit: a GLONASS timing reference that uses signals from the satellite navigation system operated by the Russian Aerospace Defense Forces, and Synchronous Ethernet (SyncE), an ITU-T synchronization standard that delivers frequency synchronization over the Ethernet physical layer. This enhanced version of the SSU 2000 will be the... read more

This article is tagged with and posted in GLONASS, Latest News, Timing

Hemisphere GPS Sells Precision Business to Chinese UniStrong

February 4, 2013By

On January 31, Hemisphere GNSS Inc., a subsidiary of Beijing UniStrong Science & Technology Co. Ltd., purchased the Precision Products business and related GNSS technology and intellectual property from Hemisphere GPS Inc. for $15 million US. In a related press release, Hemisphere GPS Inc. has announced the intention to change its company name to AgJunction. As part of the transaction,... read more

LabSat 2 Customers Offered Free BeiDou Upgrade

February 4, 2013By

LabSat 2 now has the ability to record and replay satellite signals from the rapidly expanding Chinese navigation system, BeiDou. LabSat 2 users can now record and replay any combination of two channels from the three available constellations, GPS, GLONASS, and Beidou. Existing LabSat 2 users can  download the latest firmware (v2.0.0) and PC software (v2.6.14) to add this functionality... read more

This article is tagged with and posted in BeiDou/Compass, Latest News, Mobile Devices, OEM News, Simulators & Tools

Anti-Jam Protection by Antenna

February 1, 2013By
Figure 6. Outdoor jamming test campaign.

A controlled radiated pattern antenna can be an effective way to protect GPS receivers against jamming. A new CRPA, composed of seven elements, works on the E5a, E5b, E6, L2, and L1 bandwidths. This article reports on radiation pattern measurements of the array in a test facility. read more

This article is tagged with and posted in From the Magazine, GNSS, Signal Processing

The System: BeiDou ICD, Galileo-Only Positioning

February 1, 2013By

BeiDou ICD: Signal Specs Are Free At Last; First Demonstration of Galileo-Only Positioning (By Peter Steigenberger, Urs Hugentobler, and Oliver Montenbruck) BeiDou ICD: Signal Specs Are Free At Last The interface control document (ICD) describing the details of the BeiDou B1I open service signal on 1561.098 MHz was released December 27 at a news conference held in Beijing by the... read more

This article is tagged with and posted in BeiDou/Compass, Galileo, System and Business News, The System

Expert Advice: BeiDou, How Things Have Changed

February 1, 2013By

Economically, the System Differs Significantly from Its GNSS Cousins John W. Lavrakas In May 2007, I authored an article in GPS World looking ten years into the future and envisioning how the GNSS field would operate at that then-distant time. Reviewing my assessments, I see that I was both accurate and wide of the mark with my predictions. The prediction... read more

Signal Decoding with Conventional Receiver and Antenna

February 1, 2013By
Figure 7  Signal-to-noise-density ratio of E1 (red), E5a (magenta), E5b (blue), and E6 (green) code tracking of Galileo IOV satellite PRN 11 on December 21–22, 2012.

A method of decoding an unknown pseudorandom noise code uses a conventional GNSS antenna and receiver with modified firmware. The method was verified using the signals from the Galileo In-Orbit Validation satellites. read more