A: System Categories Archives - Page 159 of 205 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

June 30, 2011

Summer Dreams: Case Western Wins Robotic Lawnmower Contest

2011 Case Western Reserve team winning robotic lawnmower

A team from Case Western Reserve University in Cleveland, Ohio took home the top $15,000 prize and a special award for the most aesthetically pleasing cut in the three-day 2011 Robotic Lawnmower Competition held in Dayton, Ohio on May 31 through June 2.

The second place award of $10,000 went to Auburn University and Wright State University won the third place prize of $5,500.

By Inside GNSS

USA Challenge Competition Seeks Satellite Navigation Apps

This is a 1993 photo of Walter, a German astronaut. He exemplifies the fearless approach to experimentation and the spirit of fun that we are looking for (DLR photo)

[Updated June 30] Lucky you – you have three extra days to submit your GNSS application idea to the USA Challenge! The extended deadline is midnight Sunday (Europe) or 3 P.M. (Pacific time) on July 3.

Right now, some team is hard at work in a basement, an office, a dorm room or a lab. They are about to come up with a new, useful and commercially viable idea for a satellite navigation application or location based service.

By Inside GNSS

June 28, 2011

First Encounters: Asteroid MD 2011 Meets the GPS Constellation

MD 2011 trajectory (NASA)

A schoolbus-sized asteroid grazed the Earth’s atmosphere around 1:00 P.M. (EDT) on June 27. It was 7,600 miles (12,300 km) away at its closest point, at which time it veered away across the South Atlantic Ocean.

It actually passed through the GPS constellation, alerting us to the vulnerability of our vital PNT space vehicles. We can now add asteroids to the the list of GNSS collision risks that already includes other satellites and space debris.

By Inside GNSS

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U.S. Supreme Court to Weigh In on GPS Surveillance and the Fourth Amendment

On June 27, the Supreme Court decided to accept a 2005 Washington D.C. warrantless tracking case that illustrates how confusing GPS satellite positioning and the new technologies that follow, sense and link us are to judges and public alike. The case, United States v. Jones, will probably be heard during the October 2011 term.

By Inside GNSS

June 26, 2011

Airport Authority of India Says GAGAN Satellite is in Position

Detail of India’s GAGAN system, from a presentation by Dr. S.V. Kibe. For full diagram:

The communications satellite that carries India’s GPS-Aided Geo Augmented Navigation (GAGAN) system has been positioned, according to major news sources in India.

"The initial phase is now over. The satellite is now in position," Airports Authority of India chairman V.P. Agarwal said at a New Delhi workshop on aviation safety.

"We are now going through the certification stage of the Satellite-Based Augmentation System (SBAS) and we will have certification of the system by June 2013." he said, according to reports.

By Inside GNSS

June 25, 2011

Excerpts from House Transportation Subcommittee Hearing on LightSquared Interference to GPS

Return to main story.

By Inside GNSS

Intermodulation Effects: Another Perspective on LightSquared Interference to GPS

Much of the research into the possible effects of the planned LightSquared cellular broadband transmissions near the GPS L1 band have focused on the saturation of the front end of GPS receivers caused by the high power of the terrestrial LightSquared base stations. In this article, an engineer with a long history in broadcast digital television takes a look at the likely effects on GPS receivers of third-order intermodulation products created by the LightSquared signals.

By Inside GNSS

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LightSquared Lays Out New GPS Plan for Skeptical House Members

Would-be cellular broadband company LightSquared promised a Congressional subcommittee Thursday (June 23, 2011) that it would scale back its proposed wireless system and help pay to find a way to mitigate the network’s adverse effects on users of the Global Positioning System.

By Inside GNSS

June 24, 2011

Appropriators Cut $98 Million from FY12 GPS Program, Add $40 Million for Block IIF

The House Appropriations Committee approved its version of the Fiscal Year 2012 (FY12) Department of Defense Appropriations Act (H.R.2219) on June 14, cutting funds from the next-generation GPS space (GPS III) and operational control (OCX) segments, while adding money to the current GPS IIF satellite allocation.

By Inside GNSS

Senate Proposals for GPS Receiver Standards Won’t Solve LightSquared Issue

LightSquared’s proposed broadband service may cause trouble for GNSS receivers, such as this one, that use commercial satellite augmentation services.

The Senate is considering establishment of receiver standards as part of a wide-ranging effort to find more frequencies for wireless broadband services, a move that could ultimately result in expensive new requirements for the GPS community.

By Inside GNSS

June 23, 2011

House Appropriations Bill Cautions FCC on LightSquared GPS Interference

The U.S. House of Representatives Appropriations Committee today (June 23, 2011) approved action that would prevent the Federal Communications Commission (FCC) from expending any funds related to a conditional waiver it granted a company called LightSquared until all concerns have been resolved about interference with Global Positioning System (GPS).

By Inside GNSS

LightSquared Interference Could Cause $96 Billion a Year in GPS Commercial Losses

The report concerns economic effects on high precision commercial uses of GPS, such as precision agriculture. (U Calif. photo)

Research released yesterday (June 22, 2011) indicates that interference from LightSquared cellular broadband transmitters could cost manufacturers and users of commercial GPS technology up to $96 billion in annual losses.

By Inside GNSS

June 22, 2011

GLONASS, Galileo Finances Star at Paris Air Show

The two Soyuz ST-B launchers and Fregat-MT upper stages arrived at Kourou harbor on June 18 are the most powerful Soyuz-Fregat combination available, intended to launch the four Galileo IOV satellites. Arianespace photo

Supporters of Europe’s Galileo system got some good news today (June 22, 2011) at the Paris Air Show: savings in the program have freed up funds that may be able to support acquisition of at least six additional spacecraft by 2014.

Taking part in a signing ceremony for the final Galileo work packages, European Commission Vice President Antonio Tajani announced that improved program management and cost-cutting by industry vendors could free up €300 million ($482.8 million) — enough to ensure that 24 satellites could be launched by 2015.

By Inside GNSS

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A: System Categories

GLONASS-K for Airborne Applications...

GPS Interference Testing...

Summer Dreams: Case Western Wins Robotic Lawnmower Contest

USA Challenge Competition Seeks Satellite Navigation Apps

First Encounters: Asteroid MD 2011 Meets the GPS Constellation

U.S. Supreme Court to Weigh In on GPS Surveillance and the Fourth Amendment

Airport Authority of India Says GAGAN Satellite is in Position

Excerpts from House Transportation Subcommittee Hearing on LightSquared Interference to GPS

Intermodulation Effects: Another Perspective on LightSquared Interference to GPS

LightSquared Lays Out New GPS Plan for Skeptical House Members

Appropriators Cut $98 Million from FY12 GPS Program, Add $40 Million for Block IIF

Senate Proposals for GPS Receiver Standards Won’t Solve LightSquared Issue

House Appropriations Bill Cautions FCC on LightSquared GPS Interference

LightSquared Interference Could Cause $96 Billion a Year in GPS Commercial Losses

GLONASS, Galileo Finances Star at Paris Air Show