Main Categories Archives - Page 179 of 237 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

October 4, 2011

GNSS Systems Reports: Compass ICD, Expanded QZSS, GLONASS Launches, GPS Budget Issues, Galileo Reprofiling

[Updated October 3] All five of the world’s major satellite navigation systems are poised to offer new capability — if the money comes through — program representatives told attendees at the recent Institute of Navigation’s GNSS 2011 conference in Portland.

The satellite navigation systems in China, Japan, and the United States have each recently had new satellites added, while those in Russia and Europe are poised for new launches. Budgets are in flux for most systems, however, so it remains to be seen how the systems will advance over the next year.

By Inside GNSS

September 30, 2011

High-Precision GNSS Market Set to Increase Almost 100% by 2016, Study Predicts

Following a difficult 2009, the precision GNSS market is moving into a new period of sustained growth, resulting in a near doubling of shipments and revenues by 2016, according to recently completed study by ABI Research.

By Inside GNSS

LightSquared Interference to GPS Reports Pack the Room at ION GNSS 2011

While a representative for a proposed broadband network assured attendees at a recent satellite navigation meeting that their telecom system could co-exist with the Global Positioning System, a panel of GPS experts raised new doubts about the broadband system and interference from its handsets.

By Inside GNSS

Historical Monument App Wins USA Challenge “People’s Choice” Award at ION GNSS 2011

Georeader, a free Android Smartphone app that allows written text to be placed at any GPS location, was the audience favorite of five USA Challenge GNSS application idea contest finalists profiled at the September ION GNSS 2011 conference in Portland, Oregon.

By Inside GNSS

September 16, 2011

LightSquared Would Jam GPS, Defense Officials Tell Congress

Air Force Space Commander Gen. William Shelton at House Armed Services subcommittee hearing

Amidst a storm of political controversy and the conspicuous absence of a key administration witness, Department of Defense (DoD) officials told members of Congress today (September 15, 2011) that a proposed broadband wireless service would degrade or render useless billions of dollars of equipment essential to military operations.

By Inside GNSS

September 14, 2011

Locata Passes USAF CDR, Technology Adopted by Leica, Launches at ION GNSS 2011

Leica’s Jigsaw Positioning System with LocataLite

Locata Corporation and the U.S. Air Force have announced that the Australia-based company has successfully completed the critical Design Review (CDR) contract phase for a Locata network that will enable the U.S. Air Force to deploy a new ground-based, centimeter-accurate "truth-reference level" positioning system for use in GPS-denied environments.

By Inside GNSS

FCC Calls for More Testing of Lightsquared Interference to GPS; White House Ties Revealed

In a remarkable change of momentum, the Federal Communications Commission (FCC) issued a public notice yesterday (September 13, 2011) stating that “additional targeted testing” is needed in the matter of LightSquared Subsidiary LLC’s interference to GPS.

By Inside GNSS

September 9, 2011

First Galileo IOV Satellite Reaches Kourou

The Galileo In-Orbit Validation (IOV) ProtoFlight Model (PFM) and Flight Models (FM-2, FM-3 and FM-4) undergoing assembly and testing at Thales Alenia Space’s facility in Rome during May 2011. ESA – S. Corvaja

The first Galileo navigation satellite arrived Wednesday (September 7, 2011) in Europe’s Spaceport in French Guiana, ready to begin preparations for launch on 20 October.

Packed within its protective, air-conditioned container, the satellite — known as Known as Flight Model 2, or FM2 — landed at Cayenne Rochambeau Airport aboard an Antonov aircraft, having departed from Thales Alenia Space Italy’s Rome facility, where it was built.

By Inside GNSS

Officials Decry Risks of Severe GPS Interference; LightSquared Makes New Offer

LightSquared told a congressional committee today (September 8, 2011) that it would limit the on-the-ground power of its signals to avoid overpowering GPS receivers, which use frequencies next door that the company proposes to have rezoned for its high-powered wireless broadband network.

By Inside GNSS

September 8, 2011

Looming Budget Hurricane Could Swamp the GPS Landscape

Budget storms have reappeared on the horizon and the fore¬cast for defense expenditures, including for the GPS program, is grim with a high probability of ugly.

By Dee Ann Divis

The Differences in Differencing

Equation 1

Q: How does measurement differencing affect my computed position?

A: The short answer is, “That depends.”

Standalone, or undifferenced, measurements obviously produce the poorest positioning performance. However, how we proceed from this most basic data processing approach may affect the computed solution. In this article, we look at the details of why this occurs.

By Inside GNSS

Codes: The PRN Family Grows Again

Working Papers explore the technical and scientific themes that underpin GNSS programs and applications. This regular column is coordinated by Prof. Dr.-Ing. Günter Hein, head of Europe’s Galileo Operations and Evolution.

By Inside GNSS

Everywhere Navigation

Consumer demand for positioning information is currently being met by a plethora of wireless positioning technologies. The most popular consumer positioning technology, GNSS, is only one option along with several methods that use cellular networks to provide location, such as wireless local area networks (WLANs), wireless personal area networks (WPANs), radio frequency identification (RFID) tags, and ultrawideband (UWB) communications.

By Inside GNSS

Main Categories

Galileo: At Long Last, Launch...

Interstate Launches First Common GPS Module–Based Receiver...

GNSS Systems Reports: Compass ICD, Expanded QZSS, GLONASS Launches, GPS Budget Issues, Galileo Reprofiling

High-Precision GNSS Market Set to Increase Almost 100% by 2016, Study Predicts

LightSquared Interference to GPS Reports Pack the Room at ION GNSS 2011

Historical Monument App Wins USA Challenge “People’s Choice” Award at ION GNSS 2011

LightSquared Would Jam GPS, Defense Officials Tell Congress

Locata Passes USAF CDR, Technology Adopted by Leica, Launches at ION GNSS 2011

FCC Calls for More Testing of Lightsquared Interference to GPS; White House Ties Revealed

First Galileo IOV Satellite Reaches Kourou

Officials Decry Risks of Severe GPS Interference; LightSquared Makes New Offer

Looming Budget Hurricane Could Swamp the GPS Landscape

The Differences in Differencing

Codes: The PRN Family Grows Again

Everywhere Navigation