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September 30, 2009

On-Orbit Signal Problem Delays Next GLONASS Satellite Launch; Russian Space Agency Investigates

A problem caused by the signal generator in an on-orbit GLONASS-M satellite (#726) led the Russian space agency (Roscosmos) officials to delay a scheduled September 25 launch of three new spacecraft.

Sergey Revnivykh, deputy director general of Roscosmos’s Central Research Institute of Machine Building, told Inside GNSS today (September 30) that the agency has set up a task force that includes Revnivykh to investigate the problem with the on-orbit satellite and to ensure that the new spacecraft are free of similar technical difficulties.

Inside GNSS • September/October 2009

Good, But Not Great

This book is a welcome addition to the GNSS textbook literature by the team of authors who have since 1992 produced five editions of an excellent book on GPS targeting high precision users, Global Positioning System (GPS): Theory and Practice. Hofmann-Wellenhof is also the lead author of the 2003 book, Navigation, and for the second edition of the classic Physical Geodesy (2006).

Inside GNSS • September/October 2009

Fireside GPS

My history with GPS began during the time of the “Cold War” in what was then Czechoslovakia. In 1975, the ION Journal of Navigation was the only information available to me.  Despite that, my team at the Czech Technical University developed a GPS receiver and measured the position of our faculty in 1984.  In those relatively isolated years, we gained a good deal of experience with GPS signals.

March 30, 2010 - April 2, 2010
Moscow, Russia
August 19, 2009

Russia Building Out GLONASS Monitoring Network, Augmentation System

With a nearly restored and modernizing GLONASS system beginning to make inroads into mass market products and services, Russia has revealed plans to build out a space-based augmentation system (SBAS) and establish its first ground monitoring stations outside the Russian territory. 

In a July 30 presentation at an International Committee on GNSS (ICG) working group on interoperability, Dmitry Marareskul, head of the onboard satellite navigation sector of Information Satellite System Reshetnev Corporation in Zheleznogorsk, revealed Russia’s plans to expand its network of GLONASS monitoring and measuring stations to include sites in Australia, Cuba, and South America.

August 11, 2009

Spirent Launches New Signal Generator

Spirent Communications plc has launched the GSS6300 Multi-GNSS Signal Generator, intended for high-volume production test applications for devices that use commercial GPS/SBAS, GLONASS, and/or Galileo receivers.

The GSSS6300 provides a comprehensive remote control interface, designed to facilitate integration into automated test equipment (ATE) environments.

New Builds • July 16, 2009

Spirent Launches Multi-GNSS Constellation Simulator

Spirent Communications has launched its GSS6700 Multi-GNSS Constellation Simulator with test test capability GPS, GLONASS, and the planned European Galileo system.

July 17, 2009

GPS Signal Anomalies: Is SVN49 Just the Tip of the Iceberg?

After GPS Wing engineers and contractors figure out how to solve the elevation-dependent signal anomalies on the latest GPS satellite — Space Vehicle Number 49 (SVN49), they may want to take a look at another nine Block IIR and IIR-M spacecraft that European scientists say exhibit similar, but less severe, behavior.

In an article that will appear in the July/August issue of Inside GNSS, Tim Springer and Florian Dilssner, GNSS engineers in the Navigation Support Office of the European Space Operations Center (ESOC), described the effects of the anomaly as well as the U.S. Air Force’s initial attempts to solve the problem by altering the broadcast satellite orbital positions and time. A version of the article was posted June 25 on the magazine’s website.

New Builds • July 9, 2009

GPS Networking Offers Variable Gain Amplifier with Push Button Control

GPS Networking, of Pueblo, Colorado, has launched the VGLCDLA30RPDC, a variable gain GPS in-line amplifier with LCD display and push button control.

Featuring a range of 0–30 dB, the VGLCDLA30RPDC’s push button control can increase or decrease gain in increments of 1 dB, enabling operators to make precise adjustments quickly and view the output power at any given time for more efficient testing.

The unit operates on 110VAC or 220 VAC transformer (wall mount) and 240 VAC (United Kingdom). Connector options include types N, SMA, TNC, and BNC.

July 8, 2009

New RTCM Standard Supports Internet Streaming of GNSS Corrections to Mobile Users

The Radio Technical Commission for Maritime Services (RTCM) has completed a revision (Version 2.0) of its standard for Networked Transport of RTCM via Internet Protocol (Ntrip).

Designated as RTCM Standard 10410.1, Among other things, the new standard defined by RTCM’s Special Committee 104 (SC104) provides a protocol for streaming differential correction data or other kinds of Global Navigation Satellite System (GNSS) data to stationary or mobile users over the Internet.

Jammer Dectector
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