Aerospace and Defense Archives - Page 52 of 60 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

April 10, 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."

By Inside GNSS

March 31, 2010

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

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.

By Inside GNSS

March 26, 2010

IET Seminar: GNSS-10, The Future of Satellite Navigation

The UK Institution of Engineering and Technology will sponsor a one-day seminar on Galileo and GNSS on Thursday, April 29 at the IET headquarters on the Thames Embankment, Savoy Place, London.The event runs from 9 A.M. to 5 P.M.

Speakers include GNSS experts EADS Astrium, Helios, Roke Manor Research Ltd, SSTL, Logica and University College London.

By Inside GNSS

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.

By Inside GNSS

March 4, 2010

A Closer Look at the GPS OCX Contract

By now, the news is out: Raytheon Corporation’s Intelligence and Information Systems (IIS) business, has won the contract to build the Next Generation GPS Control Segment (OCX).

By

February 26, 2010

Raytheon Wins $1.5-Billion GPS OCX Contract

Officials from the Space and Missile Systems Center’s Global Positioning Systems Wing announced today (February 25) the award of the Next Generation GPS Control Segment (OCX) contract to Raytheon Company, Intelligence & Information Systems, Aurora, Colorado.

With a baseline duration of 73 months, the OCX development contract has option years for sustainment worth a potential total of $1,535,147,916. Raytheon teammates include Boeing, ITT, Braxton Technologies, Infinity Systems Engineering, and the Jet Propulsion Laboratory.

By Inside GNSS

February 19, 2010

President Proposes $1.23 Billion for GPS in FY 2011 Budget

President Obama’s proposed budget for fiscal year 2011 (FY11) would allocate $1.057 billion for Department of Defense (DoD) GPS-related procurement and development activities and nearly $180 million to the Department of Transportation (DoT) for civil GPS programs.

By Inside GNSS

February 16, 2010

Ready to Navigate!

After three decades of increasingly widespread use, satellite navigation-based services have changed significantly, especially for general users in the mass market. New technology enablers such as assisted GPS (A-GPS), the use of massively parallel correlation, and the application of advanced positioning techniques have significantly enhanced the time-to-first-fix (TTFF) and sensitivity of today’s receivers.

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February 11, 2010

First GPS Block IIF Satellite Moves to Cape Canaveral: Launch Window Opens Mid-May

[updated Februaary 16] The first Block IIF satellite is undergoing final launch preparations after arriving at Cape Canaveral Air Force Station in Florida aboard a Boeing-built C-17 Globemaster III airlifter.

Space Vehicle 1 (SV-1), the first of 12 GPS IIF satellites for the U.S. Air Force, will lift off on a United Launch Alliance Delta IV vehicle later this year, with the first launch window in mid-May.

By Inside GNSS

January 28, 2010

New LMCO SV Lab Will Support GPS IIIA Production

Lockheed Martin has announced that its new Space Vehicle Integration Laboratory (SVIL) near Denver, Colorado, has achieved initial operational capability and is supporting the company’s satellite development program activity, including the production run of the next-generation GPS IIIA spacecraft.

By Inside GNSS

ESA, Industry Sign Galileo FOC Contracts

René Oosterlinck, the European Space Agency’s director of the Galileo program and navigation-related activities, and company representative signed the first three contracts for the Galileo full operational capability (FOC) phase on January 26. The event marks the official start of building the Galileo operational infrastructure.

By Inside GNSS

January 8, 2010

GNSS Forum: How Galileo Can Help Europe Recover from the Economic Crisis

Back in 1999, the European Union decided to set up a global satellite navigation system (GNSS), known as Galileo, for civil and commercial use. Early 2010 the European Commission awarded the contracts for Galileo’s first satellites, launchers and support services. In 2011 the European system will finalize its validation phase. As a result, the initial service provision of Europe’s satellite navigation system could start as of early 2014.

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Modernization Milestone

The New Year’s festivities had ended and satellite operators at the 2d Space Operations Squadron (2 SOPS) at Schriever Air Force Base, Colorado, were hard at work conducting routine operations on the GPS satellites. At around 11:30 in the morning local time (1830 UTC) on January 1, 2004, range errors for space vehicle number (SVN) 23 began to rapidly drift above the 30-meter threshold.

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Aerospace and Defense

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The GPS Assimilator...

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

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

IET Seminar: GNSS-10, The Future of Satellite Navigation

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

A Closer Look at the GPS OCX Contract

Raytheon Wins $1.5-Billion GPS OCX Contract

President Proposes $1.23 Billion for GPS in FY 2011 Budget

Ready to Navigate!

First GPS Block IIF Satellite Moves to Cape Canaveral: Launch Window Opens Mid-May

New LMCO SV Lab Will Support GPS IIIA Production

ESA, Industry Sign Galileo FOC Contracts

GNSS Forum: How Galileo Can Help Europe Recover from the Economic Crisis

Modernization Milestone