Archives

SBAS (WAAS) and NDGPS Accuracy and Statistics

October 21, 2010 - By

There's something I've been wanting to write about since the ION-GNSS conference a few weeks ago. However, a nasty cold, a 10-day trip to Europe (INTERGEO conference), and some jet lag have kept me from it until now. read more

This article is tagged with and posted in Newsletter Editorials, Opinions, Survey, Survey Scene

Tradeshow’s the Appeal at INTERGEO 2010 Conference in Cologne

October 6, 2010 - By

This week, I’ve been attending the INTERGEO 2010 conference in Cologne, Germany. It’s a gathering of ~16,500 people interested in geodesy, geoinformation, and land management. It’s the largest event of its kind in the world. read more

This article is tagged with and posted in Newsletter Editorials, Opinions, Survey, Survey Scene

Innovation: Record, Replay, Rewind

October 1, 2010 - By

Testing GNSS Receivers with Record and Playback Techniques
Is there a way to perform repeatable tests on GNSS receivers using real signals? This month’s column looks at how to use an RF vector signal analyzer to digitize and record live signals, and then play them back to a GNSS receiver with an RF vector signal generator. read more

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

Letter to the Editor: History Articles Set Record Straight

October 1, 2010 - By

I was relieved to see that the facts related to the conception of GPS were clearly laid out in the two-part article “GPS Heroes” (May and June issues). During the past few years, erroneous information about the early years of GPS development has circulated in some military, engineering, and scientific circles.These stories centered on some version of the idea that GPS’ design originated with the Naval Research Laboratory (NRL) and within the patent submitted for Timation by the NRL’s Roger Easton; the U.S. Air Force and The Aerospace Corporation were conspicuously missing from the various scenarios that credited Roger Easton with “inventing” GPS. read more

This article is tagged with and posted in GNSS

Out in Front: Welcome to Accuracy Anonymous

October 1, 2010 - By

Hi, my name is Alan, and I’m an accuracy addict. I got my first taste of accuracy back in 2000 when I started at GPS World, and discovered the vast range of very advanced things that people were doing with the signals of the Global Positioning System. This filled me with a great feeling of elation, expansiveness, and effectiveness. I can position anything. I can track anything. I can go anywhere, and know where I am. I can direct something else to go somewhere, and have it hit exactly on target. I can examine the minute movements of the earth, the swaying of skyscrapers, the moisture content of the atmosphere, and I can know all. I began to feel the illusion of omnipotence — of power over all. The more I found out about accuracy, the more I used it, the more addicted I became. read more

This article is tagged with and posted in From the Editor

Expert Advice: An EPIC Start for Coordination

October 1, 2010 - By

The new European Positioning, Navigation, and Timing (PNT) Industry Council (EPIC) will be a forum for organizations with an interest in all PNT systems including Global Navigation Satellite Systems (GNSS). EPIC shall serve as an information and distribution portal between all stakeholders in the PNT community. Its mandate includes all GNSS constellations and related augmentation systems worldwide, both operational and in development/modernization. read more

This article is tagged with and posted in Expert Advice & Leadership Talks, GNSS, Opinions

The System: GLONASS Forecast Bright and Plentiful

October 1, 2010 - By

At the Civil GPS Service Interface Committee meeting in Portland, Oregon, on September 20, Sergey Revnivykh, Deputy Director General of Roscosmos’s Central Research Institute of Machine Building, reported on the status and future of GLONASS. He provided a number of details on the present constellation and how it will be augmented in the future, stressing that GLONASS is doing well... read more

This article is tagged with and posted in Galileo, GLONASS, GNSS, GPS Modernization, The System

Sparse Network: Wide-Area, Sub-Decimeter Positioning for Airborne LiDAR Surveys

October 1, 2010 - By

The use of a precise wide-area positioning technique for airborne trajectory solutions for LiDAR surveys provides both relative and absolute accuracies similar to those derived from using a local GNSS reference station. read more

This article is tagged with , , and posted in Mapping, Mapping, Survey