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Federal Agencies Plan Shutdown of 37 Differential GPS Stations
July 5, 2016

Federal Agencies Plan Shutdown of 37 Differential GPS Stations

Graphic Depicting NDGPS Coverage After Site Reductions

The U.S. Coast Guard, the U.S. Army Corps of Engineers (USACE), and the Department of Transportation (DoT) released a Federal Register notice today (July 5, 2016) announcing a reduction of the Nationwide Differential Global Positioning System (NDGPS).

The planned reduction calls for the shutdown and decommissioning of 37 DGPS sites, leaving 46 operational sites available to users in coastal areas. Termination of the NDGPS broadcasts is scheduled to occur on August 5, 2016.

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By Inside GNSS
Army Plans Awards, Solicitations for Assured PNT with(out) GPS
July 1, 2016

Army Plans Awards, Solicitations for Assured PNT with(out) GPS

The U.S. Army will soon release new contracts and a post-Milestone B solicitation as part of its shift to a system of systems approach for making sure warfighters have the position, navigation, and timing (PNT) information they need regardless of issues with getting the GPS signal.

The Assured PNT (APNT) approach incorporates multiple sensors and an open architecture into an integrated whole that is resilient and easy to update, explained Kevin Coggins, the direct reporting program manager for PNT.

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By Dee Ann Divis
Homeland Security, PNT ExCom Move on Backing Up GPS

Homeland Security, PNT ExCom Move on Backing Up GPS

Harold “Stormy” Martin, director NCO for Space-Based PNT

The Department of Homeland Security (DHS) is moving forward to establish a backup for the position, navigation, and timing (PNT) information provided by GPS. This month the agency assumed the lead in a yearlong effort to specifically define the requirements for an alternative source of timing information to and released a solicitation for research to help protect critical infrastructure from timing disruption or spoofing.

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By Inside GNSS
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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

South Monterey Bay

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
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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GNSS Hotspots | May 2019
May 29, 2016

GNSS Hotspots | May 2019

One of 12 magnetograms recorded at Greenwich Observatory during the Great Geomagnetic Storm of 1859
1996 soccer game in the Midwest, (Rick Dikeman image)
Nouméa ground station after the flood
A pencil and a coffee cup show the size of NASA’s teeny tiny PhoneSat
Bonus Hotspot: Naro Tartaruga AUV
Pacific lamprey spawning (photo by Jeremy Monroe, Fresh Waters Illustrated)
“Return of the Bucentaurn to the Molo on Ascension Day”, by (Giovanni Antonio Canal) Canaletto
The U.S. Naval Observatory Alternate Master Clock at 2nd Space Operations Squadron, Schriever AFB in Colorado. This photo was taken in January, 2006 during the addition of a leap second. The USNO master clocks control GPS timing. They are accurate to within one second every 20 million years (Satellites are so picky! Humans, on the other hand, just want to know if we’re too late for lunch) USAF photo by A1C Jason Ridder.
Detail of Compass/ BeiDou2 system diagram
Hotspot 6: Beluga A300 600ST

Electronic Throwaways, Space X Wins, Drones at Sea and Shaking It Up

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By Inside GNSS
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
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