TAG: WAAS

Innovation: Ground-Based Augmentation

April 2, 2014By
FIGURE 5. Research aircraft D-IBUF (Dornier Do 128-6).

Combining Galileo with GPS and GLONASS
While a GPS-based GBAS will offer improved navigation services for aircraft, might these services be even better if the systems were to use satellites from other constellations besides GPS? In this month’s column, the authors show how GBAS protocols might be modified to accommodate multiple constellations, offering results of preliminary tests using GPS, GLONASS, and Galileo simultaneously. read more

This article is tagged with , and posted in Aviation, Aviation & Space, From the Magazine, GNSS, Innovation, Receiver Design

NovAtel Awarded Contract to Supply WAAS Receivers for FAA System

October 1, 2013By

NovAtel, an OEM provider of high-precision GNSS positioning products, has been contracted by the Federal Aviation Administration (FAA) to produce and deliver 176 Wide Area Augmentation System (WAAS) third-generation reference receivers (G-III). The contract includes engineering support for the receiver as well as support for the current generation reference receiver (G-II), Geostationary Earth Orbit Uplink Subsystem – Type 1 (GUST)... read more

This article is tagged with , , , and posted in Aviation, Aviation & Space, Government News, Latest News, Transportation News

Expert Advice: Which Is the Best GNSS Receiver?

October 1, 2013By
Jaynata Ray

By Jayanta Ray Aerospace GNSS receivers constitute a class apart, compared to their more popular relatives used in automotive, cell phone, or survey applications. Automotive and cell-phone receivers can sometimes provide position information even in indoor environments. The survey class of receivers provides centimeter-level accuracies. However, neither group can guarantee the reliability and integrity of the position solution, and users... read more

Accord’s NexNav GPS Receiver Supports Freeflight with FAA’s Capstone Retrofit Project

May 22, 2013By

Accord Technology’s NexNav GPS receiver will be supporting FreeFlight Systems with its recently awarded FAA Capstone Retrofit Project. In March 2013, FreeFlight and Accord announced their collaboration to develop practical and cost-effective ARINC 429 WAAS GPS solutions that enable aircraft operators to meet ADS-B, RNP (0.3) and other performance-based navigation mandates, worldwide. The NexNav Circuit Card Assembly (CCA) will integrate... read more

Personal Privacy Jammers: Locating Jersey PPDs Jamming GBAS Safety-of-Life Signals

April 1, 2012By
Grabowski-opener2

When jamming interfered with GPS signals at Newark Airport, a three-month effort determined that low-power, mobile personal-privacy devices were responsible. This article describes how they were found and outlines how the observable parameters of such devices encompass a wide variation in RF spectra and internal modulation. read more

Integrity for Non-Aviation Users: Moving Away from Specific Risk

July 1, 2011By
Pullen-Open2

Non-aviation users of satellite- and ground-based augmentation systems do not require the conservative level of integrity built into these systems for aviation users. Removing it can produce substantial benefits in terms of smaller error bounds and improved availability. read more

This article is tagged with , , , and posted in Augmentation & Assistance, Aviation, GNSS, Transportation