Aerospace and Defense Archives - Page 51 of 68 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

U.S. Air Force Authorizes Lockheed to Finish GPS III SVs 7 & 8

The U.S. Air Force has awarded Lockheed Martin more than $245 million in contract options to complete production of its seventh and eighth GPS Block III satellites.

The two space vehicles (SVs 07–08) received initial funding under a February 2013 long-lead material contract for the Air Force’s second set of four satellites, GPS III SV 05–08. Similar to this current award announced yesterday (April 1, 2014), the Air Force exercised an option to complete production of SVs 05–06 in December 2013.

By Inside GNSS

March 31, 2014

Munich Summit 2014 Stages Comeback as Europe’s Preeminent GNSS Event

Matthias Petschke, European Commission Director of EU Satellite Navigation Programs

After an organizational hiccup led to its cancellation last year, the “reloaded” Munich Satellite Navigation Summit 2014 successfully re-established the event as Europe’s leading forum for GNSS policy dialog.

By Inside GNSS

March 23, 2014

Paternity Suit

Don’t be misled by the title. This is not another round of speculation about who should be proclaimed the rightful “Father of GPS.”

By Inside GNSS

GPS Modernization Stalls

With the optimism of college-bound seniors touring the Ivy League, GPS managers have been weighing options to dramatically change the GPS constellation. Now, after studying the costs, considering the benefits, and assessing the funding climate, officials have made the starkly fiscal decision to stick close to home and take a few extra years to finish.

By Dee Ann Divis

March 18, 2014

FAA May Tap Three Reference Networks to Monitor Civil GPS Signals

Aviation officials are looking at combining data from the Air Force’s planned GPS ground system with services from other monitoring systems — or even relying on other systems entirely — to save money on monitoring the GPS civil signals.

By Inside GNSS

March 17, 2014

Who’s Your Daddy?

In this article, we will take a look at the various GNSS signals from the perspective of their cost-benefit tradeoffs. First, we’ll look at the evolution of consumer GPS architecture to date — where acquisition speed and sensitivity have been the main drivers of receiver architecture. That architecture has evolved rapidly to take full advantage of the characteristics of the GPS C/A code.

By Inside GNSS

March 6, 2014

FY15 Budget: GPS III Procurement to Slow, Dual-Launch Funding Cut

The Air Force is slowing GPS modernization and dropping part of the funding for dual launch of satellites, said defense officials describing the President’s Fiscal Year 2015 (FY15) budget on Wednesday (March 5, 2014).

Air Force Undersecretary Eric Fanning said the Air Force would continue to “honor our investments and obligations” regarding the Global Positioning System but would “reprofile” the GPS III program so that it meets constellation sustainment demands.

By Inside GNSS

March 5, 2014

DoT Agrees to GPS CNAV Test Plan, Seeks Public Comment

Message Type 30: satellite clock data, and corrections for ionospheric and group delay. From IS–GPS–200G

In a Federal Register notice issued today (March 5, 2014), the U.S. Department of Transportation (DoT) invited public comments on U.S. Air Force plans to implement preoperational L2C and L5 civil navigation (CNAV) messages on GPS Block IIR-M and IIF satellites next month.

By Inside GNSS

February 28, 2014

Change in GPS IIR/IIR-M Satellite Battery Charging Will Extend Mission Life

Modifications in the battery charging protocol of on-orbit GPS satellites are expected to substantially extend the mission life of the spacecraft — a particularly timely development as technical and financial difficulties have raised doubts about keeping the system’s next-generation Block III satellites on schedule for launch readiness.

By Inside GNSS

February 14, 2014

House Committee Moves to Block Loran-C Teardowns

Lawmakers overseeing the Coast Guard approved language this week that would stop the agency from dismantling facilities needed for eLoran, a proposed system that has gained wide support as a backup in case GPS signals are jammed, blocked, spoofed, or otherwise rendered unusable.

In “markups” or adjustments to language in the FY 2015 Coast Guard authorization bill, a House transportation subcommittee proposes to halt the tearing down of stations in the Coast Guard’s old Loran-C navigation system, which was turned off in 2010.

By Inside GNSS

January 31, 2014

GPS IIFs Back on Launch Manifest

The fifth GPS Block IIF satellites is scheduled for launch from Cape Canaveral on February 20 after concerns regarding a 2012 launch anomaly led the Air Force to scrub a planned launch last fall. A Delta IV M+ will carry the spacecraft into orbit.

Additional GPS IIF launches this year are tentatively set for May (Delta IV M+) and July (Atlas V rocket). The last GPS launch (GPS IIF-4) took place on May 13, 2013.

By Inside GNSS

FY14 Budget Pares GPS Appropriations

The GPS program sustained a cut of more than six percent from the levels in the president’s proposed budget for Fiscal Year 2014 (FY14), increasing the likelihood that the Next Generation Operational Control System (OCX) will be delayed and putting pressure on budgets in future years to make up for cuts to modernization efforts.

By Inside GNSS

January 22, 2014

DoT Opposes Early Start for Navigation Messages on New Civil GPS Signals

John Porcari

The U.S. Department of Transportation (DoT) is asking the Air Force to cancel its plan to add navigation data to two key civil GPS signals this year, saying they are concerned that the approach and “nonstandard engineering tools” military officials plan to use could put GPS users at risk.

By Inside GNSS

Aerospace and Defense

Key GPS/PNT Official Teri Takai Leaving DoD...

GLONASS Suffers Temporary Systemwide Outage; Multi-GNSS Receiver ...

U.S. Air Force Authorizes Lockheed to Finish GPS III SVs 7 & 8

Munich Summit 2014 Stages Comeback as Europe’s Preeminent GNSS Event

Paternity Suit

GPS Modernization Stalls

FAA May Tap Three Reference Networks to Monitor Civil GPS Signals

Who’s Your Daddy?

FY15 Budget: GPS III Procurement to Slow, Dual-Launch Funding Cut

DoT Agrees to GPS CNAV Test Plan, Seeks Public Comment

Change in GPS IIR/IIR-M Satellite Battery Charging Will Extend Mission Life

House Committee Moves to Block Loran-C Teardowns

GPS IIFs Back on Launch Manifest

FY14 Budget Pares GPS Appropriations

DoT Opposes Early Start for Navigation Messages on New Civil GPS Signals