Inside GNSS: Engineering Solutions from the Global Navigation Satellite System Community
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August 18, 2010

High-Integrity Global Positioning at Issue as Congress Works Through 2011 GPS Funding

GPS-related procurement and development items in President Obama’s proposed budget for fiscal year 2011 are moving through Capitol Hill, but not without contention. At issue is Obama’s request for $40.9 million for the High-Integrity Global Position System (HIGPS, also known as iGPS).

August 10, 2010

GPS IIF Satellite Reaches Final Orbital Location

Officials from the Air Space Space and Missile Systems Center’s GPS Wing announced today (August 10) that the first GPS IIF satellite (SVN-62) arrived on-station August 1. This indicates that the satellite is in its designated orbital position and ready for its final phase of on-orbit checkout and testing, to be completed before September. The satellite will then be cleared to serve navigation and timing users as part of the operational GPS constellation.

August 4, 2010

QZSS Satellite 'Michibiki' to Launch on September 11

JAXA has announced the launch date for Japan's first Quasi-Zenith satellite. On the morning of September 11, H-IIA Launch Vehicle No. 18 will carry the satellite, nicknamed Michibiki, to its inclined geosynchronous orbit (IGSO).

The launch was postponed from August 2 because of problems with the onboard reaction wheels. The malfunctioning part was replaced.

August 1, 2010

China Launches 5th Compass (Beidou-2) Navigation Satellite — First IGSO

[Updated August 1, 2010] China's state news agency has reported that the fifth Compass (Beidou-2) satellite — the system's first inclined geostationary orbit (IGSO) spacecraft — was launched successfully at 5:30 a.m. Sunday (August 1 — local time) from Xichang Satellite Launch Center in southwestern Sichuan Province

This was the third Compass satellite put into orbit this year, following launches in June and January 2010.

July 30, 2010

Early View on GPS SVN62: As Well As Might Be Expected

The first GPS IIF satellite (SVN62/PRN25) is on orbit and doing well, despite some well-publicized speculation about higher-the-expected range residuals detected by researchers at the German Aerospace Center (DLR).

July 29, 2010

GPS-Aided Test Flight Lowers Emissions by 35 Percent in Alaska Airlines “Greener Skies” Project

Alaska Airlines demonstrated next-generation GPS-aided flight procedures last week (July 23) during a test flight over Puget Sound, Washington, that burned less fuel and reduced emissions by 35 percent compared to a conventional landing.

The flight was part of Alaska Air Group’s “Greener Skies” project at Seattle-Tacoma International Airport (Sea-Tac) focused on using satellite-based guidance technology to fly more efficient landing procedures that will reduce environmental impacts in the region.

July 20, 2010

GNSS Status Report from ICG

The International Committee on GNSS (ICG) has published a report on “Current and Planned Global and Regional Navigation Satellite Systems and Satellite-Based Augmentation Systems”

July 19, 2010

Air Force Investigating Residuals in GPS IIF Signals

[Updated July 22, 2010] Air Force officials at the GPS Wing have confirmed that higher-the-expected range residuals detected by researchers at the German Aerospace Center (DLR) are appearing in signals transmitted by the first GPS IIF satellite, designated SVN/62/PRN25.

But the Air Force and Boeing Space and Intelligence Systems, which built the spacecraft, point out SVN62 is currently performing within specifications, and the signal phenomenon does not appear likely to have any significant effect on GPS positioning when the satellite is declared operational.

July 14, 2010

EGNOS Operator Receives Key Certification

The European Satellite Services Provider (ESSP) has received a certificate of “Air Navigation Service Provider” according to the Single European Sky Regulation 2096/2005.

July 2, 2010

GPS IIF Signals: Loud and Clear

Initial analyses by researchers in the United States and Germany of the transmissions from the first GPS Block IIF satellite indicate generally strong and healthy signals, although the some aspects of the new L5 signal are drawing close attention.

The researchers’ efforts will be reported in two articles in the July/August issue of Inside GNSS magazine.

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