The website for the first quasi-zenith satellite, dubbed Michibiki, is now open for visitors, though some areas are still under construction. The primary purpose of the site, QZ-Vision, is to publish data acquired by Michibiki. However, the site also strives to make Michibiki fun. The site consists...More>>

Two Loran-C towers have been demolished. Budget cuts and better technology sealed the fate of radio towers that have been providing navigation signals. Congress voted to cut the Long Range Aids To Navigation (Loran-C) system in the 2010 budget after it was determined it wasn't needed as a back up...More>>

Mitsubishi Heavy Industries, Ltd. and the Japan Aerospace Exploration Agency have announced a new date for the launch of Michibiki, the first QZSS satellite. The launch had been put on hold due to a suspected defect in the onboard reaction wheels.More>>

A U.S./European working group that assessed GPS-plus-Galileo receivers compared to single-system receivers has found that combined receivers offered significant benefits, according to a joint U.S. and European Union statement issued July 30.More>>

Few outside the position, navigation, and timing (PNT) community will also recall that the day before the 9/11 attacks, the U.S. government released a landmark document that described the vulnerabilities of services provided by GPS to disruption, whether by attack or inadvertent interference. The...More>>

We now definitively declare “curtain up!” on the second act of the human and technological drama, Interoperable Global Navigation Satellite Systems, by many authors, directors, and actors, upon the global stage. It happens on August 2 with removal of the message 0 (“Do Not Use in...More>>

A group working under the auspices of the Federal Aviation Administration (FAA) Navigation Services Directorate recently prepared a study assessing non-GNSS navigation system architectures to provide alternate positioning, navigation, and timing (APNT) services for aviation users, to mitigate GNSS...More>>

On February 8, the United States began shutting down its 20-odd Loran transmitters. The International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA), of which the United States is a member, continually recommends the use of eLoran as back up for GNSS, and is moving...More>>

Mitsubishi Heavy Industries, Ltd., and the Japan Aerospace Exploration Agency (JAXA) decided to postpone the launch of the first Quasi-Zenith Satellite “Michibiki” by the H-IIA Launch Vehicle No. 18 (H-IIA F18) from the Tanegashima Space Center, which was originally scheduled for August 2,...More>>

The European Commission (EC) has published an updated Galileo Open Service Signal-In-Space Interface Control Document (OS SIS ICD) giving technical specifications and performance expectations for the future system. Plus: SBAS WoesMore>>