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April 9, 2010

U.S. Invites Comments for Easing GPS SVN49 Signal Anomaly

(This article first appeared in the March 31 Inside GNSS SIGNALS eNewsletter)

The GPS Wing is in the middle of a yearlong process designed to sort out the trade-offs among a set of at least nine options that may be undertaken to reduce the effects of a signal anomaly on the GPS satellite known as SVN49.

In a March 26 teleconference, the first of two scheduled to discuss the options, Lt. Col. James Lake, the wing’s deputy chief engineer, emphasized that some of the options could well improve the performance of some receivers while decreasing that of others.

He underlined the Air Force's concern that receivers that don't conform to the specification for GPS space segment/navigation user interfaces (IS-GPS-200) "greatly complicate the issue."

April 9, 2010

GNSS Opportunities Help Drive UK to Set Up National Space Agency

(This article first appeared in the March 31 Inside GNSS SIGNALS eNewsletter)

Driven in part by a prestigious Space Innovation and Growth Strategy (Space IGS) report suggesting that the nation has lost both the best industrial work and the ability to influence programs such as Galileo, the United Kingdom will establish a new national space agency on April 1.

April 9, 2010

Canada to Decommission DGPS System

The Canada-wide DGPS Service (CDGPS), a free GNSS augmentation system initiated by the Canadian Council on Geomatics (CCOG) in 2003, will be decommissioned by March 31, 2011, according to Gary Sawayama, the system’s general manager.

The CDGPS L-band broadcast has been carried by SkyTerra Communications Inc.’s MSAT communications satellites, which are expected to be replaced this year by the next-generation SkyTerra satellites. Significant new investment in infrastructural changes would be required to migrate to a new communication satellite.

March 31, 2010

National Inventors Hall of Fame 2010 Inductees Include TIMATION Developer

Listen to TIMATION II, recorded September 30, 1969 on 137.380 MHz in AM/FM by Mike D. Kenny*

Roger Easton, who led development of the TIMATION system, one of the forerunner systems to GPS, was inducted into the National Inventors Hall of Fame today (March 31).

September 15, 2010 - September 17, 2010
Zurich, Switzerland
June 8, 2010 - June 9, 2010
Novi, Michigan
October 14, 2010 - October 15, 2010
Helsinki (Kirkkonummi), Finland
June 7, 2010 - June 10, 2010
Orlando, Florida USA
December 8, 2010 - December 10, 2010
Noordwijk, Netherlands
March 26, 2010

DoT Seeks Help from Receiver Manufacturers to Decide on GPS SVN49 Mitigation

[Updated March 27] The first of two  teleconferences hosted by the GPS Wing underlined the U.S. Air Force's desire to gain greater participation by manufacturers of user equipment in sorting out the options for mitigating the effects of a signal anomaly on the GPS satellite known as SVN49.

The March 26 teleconference, held on the same day as publication of a notice in the Federal Register inviting public comment on nine possible options for dealing with the anomaly, drew only a handful of participants. But the U.S. Department of Transportation Research and Innovative Technology Administration (RITA), which issued the invitation, and the GPS Wing, which has the lead in implementing an eventual decision, hope to see further industry participation in written comments and a second teleconference planned for April 30.

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