GPS System Integration Design & Test - GNSS and GPS System Design and Test
 
All the manufacturers of GPS, Chart-plotters
Marine electronics, navigation instruments
All the industrial manufacturers
GPS, Radio, Bus converters, Wireless Communication Network
ALGORITHMS & METHODS
Innovation: Making a Difference with GPS
Time Differences for Kinematic Positioning with Low-Cost Receivers
One of the difficulties with RTK-style positioning is resolving carrier-phase ambiguities. If you time-difference sequential carrier-phase measurements, the ambiguity actually disappears, and you can determine accurate relative positions using time-differenced carrier-phase measurements. But there are some caveats.
BLOG WITH THE EXPERTS

GPS World Tech Talk is a new blog where industry professionals and academics talk tech about GPS and GNSS systems, receivers, and applications. Every month, three new blogs are posted by international experts. Join us!

— Dorota Brzezinska, Forum Moderator

LATEST SYSTEM DESIGN & TEST NEWS
RIA Novosti Op-Ed: GPS Birds Gathering Intel?
Perhaps it?s the result of the East/West saber rattling over the conflict in the country of Georgia, but an opinion piece published by Russian news agency RIA Novosti asserts that U.S. GPS satellites serve as platforms for intelligence gathering equipment.
NASA Seeks Navigation and Timing — on the Moon
NASA has issued a request for information, or RFI, to determine interest and solicit ideas from private companies on providing communications and navigation services that would support the development of exploration, scientific, and commercial capabilities on the moon for the next 25 years.
University Balloon Reaches the Edge of Space
Students from Oklahoma State University's Radiation Physics Laboratory built and successfully launched a sensor-laden, GPS-tracked balloon this summer that reached the edge of outer space.
Indra Leads Team Tasked with Updating EGNOS
Spanish company Indra is heading the group in charge of studying the potential evolution of the current EGNOS satellite navigation system with an eye towards a future multi-constellation regional system (MRS) for the European Space Agency.
SD&T NEWSLETTER: EDITOR'S COLUMN
Perspectives — August 2008
A critical GPS enhancement, Talon NAMATH transfers very accurate or zero age of data (ZOAD) concerning the GPS ephemeris and other user ranging error (URE) aiding data over Link 16, a secure military communications channel, to U.S. Air Force planes.
GPS MODERNIZATION ARTICLES
AEP Goes Operational
The phased transition of the 22-year-old Legacy GPS Master Control Station (MCS) to the Architecture Evolution Plan (AEP) control segment, which became operational in September 2007, constituted a multi-year cooperative effort to achieve a seamless navigation service transition to GPS users.
SIGNAL PROCESSING ARTICLES
Innovation: Improving Long-Range RTK
Getting a Better Handle on the Biases
How accurate modeling of atmospheric effects coupled with an ionosphere-free ambiguity resolution process results in successful long-range RTK.
GALILEO ARTICLES
Galileo Validation
The GIOVE-A satellite broadcast Galileo's first signals on January 12, 2006. GIOVE-B is scheduled for launch on April 14, 2008. The authors describe generation of the first Galileo navigation messages, operational and performance aspects, and signal improvements. Some improvements have been already identified, and their implementation is ongoing.
AUGMENTATION & ASSISTANCE ARTICLES
Bringing All GNSSs into Line
The introduction of new GNSSs requires updating the AGPS-only solution to add support for new GPS bands, new GNSSs, and to enhance accuracy, sensitivity, and availability.
RECEIVER DESIGN ARTICLES
Innovation: Interference Heads-Up
How do users know that their receivers are being jammed and not suffering some other type of malfunction? The author look at simple techniques that can be incorporated into the design of a GNSS receiver to detect, characterize, and actually mitigate radio-frequency interference to benefit civilian and military users alike.
INTEGRATION WITH OTHER TECHNOLOGY ARTICLES
Innovation: Ubiquitous Positioning
The UbiComp concept has spawned smart coffee pots, smart printers, smart copy machines and the like, all connected via a wired or wireless network. For a UbiComp device to know its position anywhere and anytime, we need "ubiquitous positioning" or UbiPos. This article looks at the available technologies that might be used to supplement conventional GPS positioning and some initial testing that will eventually lead to a UbiPos world.
RSS FEED

Get instant delivery of System Design & Test news!  z

Click here to get RSS feeds from other GPS World sites.

NEWSLETTERS

Subscribe Today!
• Navigate! Daily News
• Mass Market OEM
• Military & Government
• Utilities & Comm Pulse
• LBS Insider Now Bi-weekly!
• Survey & Construction
• Avionics & Transportation
• System Design & Test
• Geospatial Weekly

VIEW GPS DIGITAL
 

View GPS World archives

ADVERTISEMENT

Click here