GNSS

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

Innovation: Getting Control

February 1, 2013By
I-opener2

Off-the-Shelf Antennas for Controlled-Reception-Pattern Antenna Arrays
The antenna is a critical component of any GNSS receiving equipment. It must be carefully designed for the frequencies and structures of the signals to be acquired and tracked. Important antenna properties include polarization, frequency coverage, phase-center stability, multipath suppression, the antenna’s impact on receiver sensitivity, reception or gain pattern, and interference handling. While all of these affect an antenna’s performance, let’s just look at the last two here. read more

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

Call for Participation: Round 2 of NGS Kinematic GPS Challenge

January 30, 2013By

NOAA’s National Geodetic Survey (NGS) is conducting a 12-year project, called Gravity for the Redefinition of the American Vertical Datum (GRAV-D), to redefine the vertical datum of the United States by flying airborne gravity missions. The accuracy of the resulting vertical datum depends directly on the quality of the aircraft’s GNSS position solutions. In August 2010, NGS issued a Kinematic... read more

This article is tagged with and posted in Aviation, GNSS News, Latest News, Signal Processing, Transportation News

Report from ION ITM: Faster, Smaller, Cheaper

January 29, 2013By

And more of them! That’s been one of the mantras — a controversial one, granted — of technological advance in the late 20th and early 21st centuries. It has succeeded in penetrating the global positioning, navigation, and timing vanguard, as evidenced by a handful of key presentations on the first day of the Institute of Navigation (ION) International Technical Meeting... read more