GPS Archives - Page 95 of 148 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

ESA Adds System Time Offset to Galileo Navigation Message

The four Galileo in-orbit validation (IOV) satellites now on orbit have begun broadcasting the “offset” between the GPS and Galileo system time, accurate to a few billionths of a second, according to the European Space Agency.

With satellite navigation based around the highly accurate measurement of signal travel times, both Galileo and GPS have their own internal reference time systems used to synchronize all system clocks, including those in the ground segment, on satellites, and in receivers. Galileo System Time is about 50 nanoseconds or less apart from GPS time.

By Inside GNSS

May 18, 2013

NavtechGPS Course: GPS / GNSS Operations for Engineers and Technical Professionals

Course 346 is a condensed, 4-day version of NavtechGPS’ most popular course for those who want to save on lodging and overhead. It will take place at the company offices, 5501 Backlick Road, Suite 230, in Springfield, Virginia on June 10, 11, 12 and 13.

The last day to register is May 24.

By Inside GNSS

CGSIC Meeting: Civil GPS Service Interface Committee

The 53rd meeting of the Civil GPS Service Interface Committee (CGSIC) will take place on Monday and Tuesday, September 16 and 17 just before the opening of the ION GNSS conference at the Nashville Convention Center in Nashville, Tennessee.

Attendance is free and registration is open at the website below.

The keynote speaker at Tuesday morning’s plenary is a Smithsonian
geographer, Dr. Andrew K. Johnston, who will talk about the museum’s new
permanent exhibit "Time and Navigation: The Untold Story of Getting
from Here.

By Inside GNSS

May 16, 2013

Fourth GPS IIF Satellite Launched

The fourth GPS Block IIF satellite, space vehicle number (SVN) 66, was launched successfully today (May 15, 2013) on board a United Launch Alliance Atlas V rocket at 5:38 p.m. EDT from Cape Canaveral Air Force Station, Florida.

It was the first time that an Atlas V had been used to launch a GPS spacecraft.

By Inside GNSS

May 13, 2013

White House Moves to Harden Infrastructure against GPS Disruption

System engineers across the country may soon be planning, in some cases perhaps for the first time, what they would do if they could not use the GPS service.

The effort is part of an expanded White House initiative to protect the nation’s critical infrastructure. Alhough infrastructure protection programs have been under way for some time, they did not necessarily address GPS vulnerabilities explicitly.

By Inside GNSS

May 2, 2013

MUSTER

Existing methods for improving the GNSS performance commonly attempt to enhance the signal processing and navigation estimation parts of a single receiver. Such approaches, however, leave unexplored the potential benefits inherent to the integration of data from multiple receivers.

By Inside GNSS

April 30, 2013

Air Force Examining Broader Options for Next GPS III Satellite Buy

The Air Force will decide this fall whether to build more GPS III satellites or move to a new generation of spacecraft, the leader of Air Force Space Command told Congress last week.

“We’re on contract right now . . . through (GPS III) satellite vehicle number eight. Satellite vehicles nine and beyond – the acquisition strategy for that – will be debated in the fall,” General William Shelton, commander of Air Force Space Command (AFSPC), told the House Armed Services Committee on April 25.

By Inside GNSS

Defense Department CIO Teresa Takai Gets Positioning, Navigation and Timing Brief

A Department of Defense Directive (DoDD 5144.02) issued April 22 clarifies the positioning, navigation, and timing (PNT) responsibilities for Teresa Takai, the assistant secretary of defense for networks and information integration (NII) and the DoD’s chief information officer (CIO).

By Inside GNSS

NASA Successfully Launches Three Smartphone Satellites

ET may have an improved method to phone home and satellite operators, a new way to position and control satellites — smartphones in space.

By Inside GNSS

April 25, 2013

North Korea’s GPS Jamming Prompts South Korea to Endorse Nationwide eLoran System

GPS jamming attacks from North Korea that have increased in frequency and duration since they began August 2010 have prompted the South Korean government to implement an enhanced Loran (eLoran) systems that will cover the entire country by 2016.

The South Korean government completed design, development, and construction documents for the eLoran system in February and will procure the system infrastructure through international competitive bidding.

By Inside GNSS

April 16, 2013

U.S. Agencies Seek Comments on Future Uses of NDGPS

The U.S. Department of Transportation’s Research and Innovative Technology Administration (RITA), in partnership with the U.S. Coast Guard (USCG), is seeking public comments on the current and future user needs for the Nationwide Differential Global Positioning System (NDGPS).

By Inside GNSS

Military GPS Budget Appears Steady as President Bids to Slow Defense Cuts

Spending pressures on the Pentagon seem to be coming from every direction, and the GPS program appears unlikely to avoid them entirely.

The growing needs of veterans are poised to force up health care budgets and higher transportation costs and operating tempos have dug a $22 billion-hole in the accounts for Overseas Contingency Operations in places such as Afghanistan.

By Inside GNSS

Galileo Satellite Achieves High Earth Orbit Positioning with GPS

When the European Space Agency launched its Galileo In-Orbit Validation Element-A (GIOVE-A) satellite in 2005, its main mission was to transmit Galileo test signals that secured the system’s frequencies, evaluate hardware under space environmental conditions, and so forth.

By Inside GNSS

GPS

GPS Civil Funding Request Slashed...

Future of the International Time Scale Workshop...

ESA Adds System Time Offset to Galileo Navigation Message

NavtechGPS Course: GPS / GNSS Operations for Engineers and Technical Professionals

CGSIC Meeting: Civil GPS Service Interface Committee

Fourth GPS IIF Satellite Launched

White House Moves to Harden Infrastructure against GPS Disruption

MUSTER

Air Force Examining Broader Options for Next GPS III Satellite Buy

Defense Department CIO Teresa Takai Gets Positioning, Navigation and Timing Brief

NASA Successfully Launches Three Smartphone Satellites

North Korea’s GPS Jamming Prompts South Korea to Endorse Nationwide eLoran System

U.S. Agencies Seek Comments on Future Uses of NDGPS

Military GPS Budget Appears Steady as President Bids to Slow Defense Cuts

Galileo Satellite Achieves High Earth Orbit Positioning with GPS