James L Farrell Blog
Resume for James L. Farrell, PHD
I perform functional formulations and algorithm generation plus validation for both simulation and operational purposes in system integration. Read moreCHECK LIST for DESIGNERS
Questions submitted by members of various forums, understandably, frequently involve one or more of the following topics: * some or all facets Read moreDept. of Homeland Security on GPS jamming & spoofing
At ION GNSS 2011 in Portland OR, Javad Ashjaee, James L. Farrell and others participated in a panel discussing the U.S. Dept. of Homeland Read moreLife before GPS
Before GPS took over so many operations by storm (e.g., navigation,tracking, timing, surveying, etc.), designers had access to other -- far less Read moreRUNWAY INCURSIONS
The number of runway incursions, as shown on an FAA URL was nearly a thousand in FY 2011 and 1150 for FY 2012. A subsequent article shows Read moreAircraft Collision Avoidance: Move Forward ?
A 1996 crash that killed U.S. Commerce Secretary Ron Brown drew attention to a problem that has caused thousands of airline fatalities. Read moreBOOK on TRACKING
Tracking acceleration dynamics by GNSS, radar, imaging My 2007 book on GPS and GNSS (GNSS Aided Navigation & Tracking), as its title implies, Read moreBook on GPS and GNSS
GPS and GNSS Check out a preview of “GNSS Aided Navigation & Tracking” (click here) GNSS Aided Navigation & Tracking - Inertially Read moreGYRO MOUNTING MISALIGNMENT: DEAL BREAKER
Schuler cycles distorted -- Here's why A 1999 publication I coauthored took dead aim at a characteristic that received far too little attention Read moreDEAD RECKONING by GPS CARRIER PHASE
GPS Carrier Phase for Dynamics ? The practice of dead reckoning (a figurative phrase of uncertain origin) is five centuries old. In its Read moreSINGLE-MEASUREMENT RAIM
In January of 2005 I presented a paper "Full Integrity Test for GPS/INS" at ION NTM that later appeared in the Spring 2006 ION Journal. I've Read more