TAG: PNT

Iridium and GPS revisited: A new PNT solution on the horizon?

June 8, 2016By
Replica of Iridium satellite. (Photo courtesy of Iridium)

How many times have you heard of a nearly 20-year-old space constellation being modified with a new technology? It almost never happens. Get the details on Iridium's new Satellite Time and Location System. read more

This article is tagged with , , , , , and posted in Defense, GNSS, Opinions

GNSS jam-proof test range ready for customer testing

May 25, 2016By
Locatalite transceiver installation in the White Sands Missile Range Ultra High-Accuracy Reference System, provided by the U.S. Air Force for testing equipment under conditions of GPS jamming.

A new dimension in real-world PNT testing has arrived. One of the most critical things to predict for chips, receivers and devices using alternative or back-up PNT technologies is how they will actually perform without GPS. Filling this need, the U.S. Air Force 746th Test Squadron has declared Initial Operational Capability (IOC) for its new truth reference, the Ultra High-Accuracy... read more

Air Force jam-proof reference system ready to support testing

May 24, 2016By
Locatalite transceiver installation in the White Sands Missile Range Ultra High-Accuracy Reference System, provided by the U.S. Air Force for testing equipment under conditions of GPS jamming.

The U.S. Air Force 746th Test Squadron has declared Initial Operational Capability (IOC) for its new truth reference, the Ultra High-Accuracy Reference System (UHARS), which employs LocataLite transceivers. Even when GPS is being completely jammed, UHARS provides extremely accurate positioning, navigation and time (PNT) over the large area of White Sands Missile Range (WSMR) in New Mexico that the system was designed to cover.... read more

Iridium launches alternative GPS PNT service

May 23, 2016By

Iridium Communications Inc. has introduced its Satellite Time and Location (STL) service, an alternative or complement to traditional indoor and outdoor location-based technologies, and declared it ready for use. STL’s position, navigation and timing (PNT) technology is deployed through Iridium’s 66 cross-linked, low-earth orbit satellite constellation. Through Iridium satellites and in GNSS receivers, STL technology can work to verify GPS, GLONASS, Galileo and... read more

In defense of PNT: Multi-GNSS to the rescue

May 11, 2016By
An artist's concept of a GPS IIR-M satellite in orbit (courtesy of Lockheed Martin).

For more than 41 years, many of us who were there in the beginning have been discussing the attributes, capabilities, enabling features and shortcomings of GPS and other space-based PNT (position, navigation and timing) systems. You have likely heard most of them; historically they go something like this: The signal is weak. The signal is easily jammed. The signal can be... read more

PNT Roundup: Navigating GPS-free, MEMS inertial trends and non-GPS tracking

April 7, 2016By

Initiatives to provide continuous, high-frequency and high-accuracy position spanning GPS outages or obstructions are discussed, as well as the frontiers of non-GPS tracking, in April's PNT Roundup. read more

ESA to host 2016 Summer School on GNSS at JRC

March 24, 2016By

The European Space Agency (ESA) will host its Summer School on GNSS program for students July 18–29 at the European Commission Joint Research Centre (JRC) in Ispra, Varese, Italy. The 11-day event is open to graduate students that have studied more than three years; Ph.D. students and postdoctoral researchers younger than 35 years old; and young engineers and professionals in the industry... read more

All Betz are on: A satnav book review

February 10, 2016By
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There is something for everyone interested in satnav in this wonderful book, regardless of their level of involvement or sophistication with PNT. This book is a treasure trove for PNT engineers and satnav experts but it’s readability is such that even if you are only slightly curious about how space based PNT works, you will find it an educational and enjoyable read. read more

This article is tagged with , , and posted in Defense, Opinions