Newsletter Editorials

Block IIF: Follow-on, or Failure?

May 27, 2009By

A few short weeks ago, the U.S. GPS program had its posterior firmly planted in the catbird seat. Government spokespeople in international fora looked on benignly as European, Chinese, and Russian GNSS programs struggled to resolve their issues and meet their heady challenges. All was well with the world. A new GPS satellite launched, a segment of radio-frequency spectrum secured for a promising new signal, a next-gen satellite shipped to the Cape, and the next-next-gen program nearing successful preliminary design review (since completed). In the blink of an eye, the world is turning. read more

This article is tagged with and posted in GPS modernization, Newsletter Editorials

Expert Advice: Managing the GPS Constellation for Today’s Needs

September 1, 2006By
John Lavrakas

For many, GPS is at its best performance ever, with 29 satellites in orbit and user range errors at their lowest levels in years. Yet for others, GPS performance falls short of expectations. read more

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

Potential Problems for Users of Modernized GPS Signals in Mixed-Mode Operations

June 15, 2006By

PRN 17 is the first in the new generation of GPS satellites with a new feature called flex power. read more

This article is tagged with and posted in GNSS, Newsletter Editorials, Opinions, Signal Processing, Survey