TAG: L5

JAVAD Asserts Filters Protect GPS L1, L2, L5; GLONASS L1, L2; Galileo L1, L5

September 14, 2012By

Javad Ashjaee, founder and CEO of JAVAD GNSS, has filed a letter with the U.S. Federal Communications Commission (FCC) concerning his company’s development of technical possibilities in GNSS filter designs and components. He states “I hope this will be helpful in establishing realistic guidelines for the characteristics of high-precision GNSS receivers that will be used in critical applications.” Below is... read more

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Q&A from L5 and LightSquared Webinars

May 5, 2011By

In late March, I conducted a webinar titled "A Closer Look at L5: The Future of High-Precision GNSS," in which I discussed the impact that the new GPS L5 signal/frequency may have on high-precision users. Then, in April I was part of a discussion panel-format webinar titled "LightSquared: Our Story So Far." Many questions and comments arose from both webinars, and I'll attempt to address those in this column. read more

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Webinar Brief – A Closer Look at L5: The Future of High-Precision GNSS

March 18, 2011By

Yesterday I conducted a webinar titled "A Closer Look at L5: The Future of High-Precision GNSS." Preparing for it was quite interesting, so I thought I'd share some of the slides I produced (and had produced) for the webinar. I think you'll find them interesting. read more

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Letters: L5; An Advisor Bids Farewell

September 1, 2010By

Letters: The GPS history articles by Brad Parkinson; gifts to L5; Paul Cross, GPS World Advisory Board member, bids Farewell. read more

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The System: Three’s the Challenge

August 1, 2010By

A small variance in the L5 signal, which remains well within signal specifications and will not affect pseudorange measurements, may show some impact on triple-frequency combinations of the signal’s carrier phase in high-precision applications. Observations suggest a temperature-dependent line bias in one or more carriers as a likely cause of the observed variation in the tri-carrier combination of L1, L2, and L5. read more

This article is tagged with , and posted in GPS modernization, The System

The System: An L5 Surprise

August 1, 2010By

Researchers at the German Aerospace Center say they have found a small variance in the L5 signal on IIF-1. The signal variation results in no more than a 5-centimeter error with a predictable periodicity of about six hours. The GPS Wing is studying the issue and expects to resolve it before setting the satellite healthy, in another month or so according to the schedule. read more

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“What Can GLONASS, GPS L2C, and GPS L5 Do for You?” Webinar Q&A Follow-up

October 6, 2009By

As I’ve been accustomed to doing, this newsletter addresses the questions you submitted during the Sept. 15 webinar entitled “What Can GLONASS, GPS L2C, and GPS L5 Do for You?”. There were some great questions during the webinar, and a lot of them. There were so many, in fact, that I’m going to break them up into a couple of different newsletter issues. Also, I need to update you on my trip to ION GNSS a couple of weeks ago. I might mix up the next newsletter with more Q&A as well as the ION GNSS update. read more

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New GPS Satellite’s Problems Indicated

May 4, 2009By

The U.S. Air Force spoke briefly for the first time in public regarding signal anomalies from the IIR(M)-20 satellite launched in March. read more

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