GPS

Air Force Declares Nunn-McCurdy Breach on the New GPS Operational Control System
June 30, 2016

Air Force Declares Nunn-McCurdy Breach on the New GPS Operational Control System

Secretary of the Air Force Deborah Lee James declared a critical Nunn-McCurdy breach on the GPS Next-Generation Operational Control System (OCX) today (June 30, 2016).

After a December 2015 Program “Deep Dive,” Undersecretary of Defense for Acquisition, Technology and Logistics Frank Kendall placed the OCX program under significant Department of Defense (DoD) oversight with quarterly reviews.

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By Inside GNSS
Senate Passes Defense Authorization Bill "Fencing Off" Funding for Next-Generation GPS Control System
June 22, 2016

Senate Passes Defense Authorization Bill “Fencing Off” Funding for Next-Generation GPS Control System

The Senate approved defense authorization legislation last week before heading out for weekend campaigning. The measure contains a provision the White House said would further delay completion of the already overdue next-generation GPS control system (OCX) by 6 to 12 months.

Senators passed their version of the National Defense Authorization Act (NDAA) for Fiscal Year (FY) 2017 on June 16, defying the White House, which had said June 7 it would veto the bill.

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By Inside GNSS
ION ITM - PTTI 2017: ION International Technical Meeting and Precise Time/Time Interval Meeting

ION ITM – PTTI 2017: ION International Technical Meeting and Precise Time/Time Interval Meeting

The Institute Of Navigation (ION) annual technical meeting (ITM) will be held in conjunction with the Precise Time and Time Interval Meeting (PTTI) at the Hyatt Regency Monterey in Monterey, California on January 30 through February 2, 2017.

This year’s joint ITM/PTTI Plenary Session: Back to the Future: Forecasts for Time and Navigation, 1917 and 2017 will explore significant forecasts made in 1917 about time and navigation and relate them to the future as we envision it from 2017.

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By Inside GNSS
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Iridium-based System, Proposed GPS Backup, Incorporates Crypto Protections
June 15, 2016

Iridium-based System, Proposed GPS Backup, Incorporates Crypto Protections

A new satellite-based positioning and timing system now available from partners Iridium and Satelles incorporates layered security elements into a service that offers 20- to 50-meter unaided position accuracy worldwide and could serve as a GNSS backup, according to the companies.

The Satelles Location and Timing (STL) service, also offers microsecond timing accuracy, said Satelles CEO Michael O’Connor — and that can be improved with more advanced receivers.

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By Dee Ann Divis
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NovAtel Raises Concerns about Ligado Test Methodology, Results
May 21, 2016

NovAtel Raises Concerns about Ligado Test Methodology, Results

NovAtel Inc. has submitted comments to the Federal Communications Commission (FCC) regarding Ligado Networks LLC’s (formerly New LightSquared LLC) License Modification Applications in which the company raises deep concerns about the testing methodology used and conclusions presented by Ligado regarding the impact of their proposed usage of L-band frequencies for a terrestrial wireless network.

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By Inside GNSS
Re-Baseline This!
May 19, 2016

Re-Baseline This!

So, if everything had gone as planned, we would have a new ground control segment (OCX) operating a new generation of satellites (GPS III) as they launch into an expanded constellation in support of modernized military GPS user equipment (MGUE).

But then the best-laid plans. . . .

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By Inside GNSS
Military GPS Receiver Advances Could Help Trim Satellite Costs

Military GPS Receiver Advances Could Help Trim Satellite Costs

Advanced military receivers using the sort of modern multi-channel, multi-constellation capabilities already available commercially, could enable the Air Force to focus its anti-jam efforts on the ground, simplifying future GPS satellites and lowering their cost. Moreover, experts told Inside GNSS, the cutting-edge receivers could be deployed years before the anti-jam capability planned for the new GPS III satellites would be fully available.

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By Dee Ann Divis
Listening for RF Noise

Listening for RF Noise

GNSS signals are vulnerable to interference due to being extremely weak when received on Earth’s surface. Therefore, even a low-power interference signal can easily disrupt the operation of commercial GNSS receivers within a range of several kilometers.

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By Inside GNSS
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