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November 17, 2014

Europe Prepares Its Part of GNSS-Enhanced Search & Rescue Service

The European Space Agency (ESA) has announced completion of tests that indicate the readiness of the European component of a modernized, GNSS satellite–aided search and rescue service known as Cospas-Sarsat.

ESA has completed construction and testing of a trio of located on three islands at the far corners of the continent, ready to pick up distress calls via satellite from across Europe and its surrounding waters.

Inside GNSS • November/December 2014

Reliable GPS-Based Timing for Power Systems

Efficient power transmission and distribution would benefit from synchronized near–real-time measurements of voltage and current phasors at widely dispersed locations in an electric power grid. Such measurements also could enable effective real-time system monitoring and control, which are considered to be the key to preventing wide-scale cascading outages like the 2003 Northeast Blackout.

Inside GNSS • November/December 2014

Evaluating the Performance of Navigation Payloads

As a navigation satellite transmits multiple signals on single frequency (e.g., Open Service and Restricted Service over L5 Band), these are combined on a common carrier to comprise a composite signal. This composite signal passes through navigation payload subsystems such as an up-converter, traveling wave tube amplifier (TWTA), filters, and so on. These subsystems may introduce adverse effects on the signal, such as amplitude and phase distortion, nonlinear effects, gain imbalance, IQ imbalance, and phase noise.

Inside GNSS • November/December 2014

Higher Aspirations for GNSS

New space missions such as the robotic repair and recovery of damaged or errant communication satellites may become possible with the aid of an emerging class of receivers that is able to use GPS signals for navigation in orbits thousands of kilometers above the middle Earth orbit (MEO) GPS constellation itself.

GNSS Solutions • November/December 2014

What are the actual performances of GNSS positioning using smartphone technology?

Q: What are the actual performances of GNSS positioning using smartphone technology?

A: “Where I am?” is the typical question asked by a person when visiting a new city or unknown place. Knowing one’s own location is generally a basic necessity for people, both in indoors and outdoors.

June 17, 2015 - June 19, 2015
Gdynia, Poland
November 14, 2014

First GPS III Launch Slips to FY17

The launch of the first GPS III satellite could slip to as late as March 2017, further delaying a modernization program that already has been pushed back repeatedly by budget cuts and technical problems.

“The first GPS III launch is tentatively considered for the first half of FY17, based on booster availability and Air Force launch priorities,” a spokesman for the Space and Missile Systems Center told Inside GNSS.

November 14, 2014

Most Tariffs on GPS Equipment Could Soon disappear

Tariffs on GPS devices in more than 70 countries could disappear in a matter of months now that the U.S. and China have worked through an impasse on expanding the Information Technology Agreement (ITA).

New Builds • November 14, 2014

Topcon Engineers Track New GLONASS Signal

Topcon Positioning Group has announced that its latest GNSS reference receiver has tracked a new signal from the GLONASS constellation.

The GLONASS-M 55 satellite was launched in June and is equipped
with an experimental payload capable of transmitting CDMA signals in the
Russian GNSS system's L3 frequency band centered at 1202.025 MHz. According to the company, Topcon engineers successfully tracked the signal using the NET-G5
receiver during a series of recent tests at the Topcon Technology Center
in Moscow, Russia.

New Builds • November 6, 2014

Tallysman Launches Smart GPS-GLONASS Antenna

Tallysman has introduced the TW5340 “smart” antenna that pairs Tallysman‘s Accutenna technology with STMicroelectronics’ Teseo II GNSS receiver.

The TW5340 is a multi-constellation GNSS antenna that provides simultaneous GPS/GLONASS/SBAS reception and is designed for use in professional grade applications such as precision timing, network synchronization, or low-current  and tracking/positioning applications.

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