GPS World's Navigate! Weekly

DECEMBER 30, 2019

HAPPY HOLIDAYS TO OUR READERS!

INSIGHTS

Staying ahead of NAVWAR and resilient PNT in 2020

Year-end message from Orolia
In 2019, military forces witnessed the global threat of GPS/GNSS interference grow. Because of this, proven and efficient signal integrity solutions will be even more critical in 2020.

TOP STORIES OF 2019

Two satellites of the GPS III constellation began transmitting signals.

Image: Peter Steigenberger, Oliver Montenbruck, Steffen Thoelert and Richard B. Langley

First light: Broadcast of L1C by GPS III

Less than three weeks after its launch, the first GPS III satellite, SVN74, started transmitting navigation signals.

Second GPS III in orbit, responding to commands

Following its launch, the U.S. Air Force’s second next-generation GPS III satellite was under control and using its own internal propulsion system to get to orbit.

Ground System COps connects with orbiting GPS III satellite

The GPS enterprise reached another major milestone on Oct. 21, when the GPS III Contingency Operations Program (COps) successfully connected with the first GPS III satellite on orbit.

Galileo experienced a week-long service outage.

Galileo down over weekend

The entire Galileo system suffered an unexpected and hitherto unexplained signal outage, beginning at 1 p.m. Central European Time on July 11.

Galileo picks itself up and moves on

After a signal outage that began on July 11, efforts to restore services reportedly found a malfunction in the calculation of time and orbit predictions.

What happened when Galileo experienced a week-long service outage

Check out an analysis of the Galileo service outage, including what happened and how it was resolved.

The GPS rollover caused a few hiccups.

GPS Week Number Rollover coming April 6

A memorandum from the Department of Homeland Security aimed to provide an understanding of the possible effects of the April 6, 2019 GPS Week Number Rollover on Coordinated Universal Time derived from GPS devices.

Schriever Air Force Base releases GPS Week Number Rollover guidelines

The 50th Space Wing Public Affairs office of Schriever Air Force Base established and posted guidelines for receiver manufacturers to ensure continued capability during the April 6 GPS Week Number Rollover.

Fallout from GPS rollover includes NOAA, Samsung, NYC, Boeing

The GPS Week Number Rollover caused several automated NOAA stations to go offline.

WHAT'S TO COME

Several articles begin discussions that will continue into the new year.

Survey accuracy: The future of precision with 5 GNSS constellations

Today’s GNSS satellites transmit on three or more carrier frequencies. This article explores the noise of the range residual and ionospheric residual to indicate the oncoming capabilities.

New military code about to board 700+ platforms

Much development has been necessary to enable the new M-code capability on more than 700 weapon systems that require it.

Commentary: High-precision positioning is going mainstream

A new generation of GNSS hardware and pioneering new correction data services are enabling cheaper, more compact and truly scalable high-precision GNSS solutions, ready for the mass market.

Year-long ocean cruise finds GNSS interference...everywhere

A year-long project aboard a commercial cargo ship collected tens of thousands of snapshots of radio-frequency interference in the GNSS band on a passage from Spain to Korea and back.

MOST POPULAR STORIES ON GPS WORLD

Here are the two most widely read articles on our website this year.

3D mapping of Notre Dame will help restoration

Detailed 3D maps of the iconic and historic Notre Dame Cathedral in Paris hold out hope for accurate reconstruction after it was devastated by a massive fire April 15.

Screenshot from video by Kevin Jenkinson

Autonomous car hits autonomous robot in bizarre collision

In a unique car accident, a self-driving Tesla Model S hit and destroyed an autonomous Promobot, the robot model v4, in Las Vegas.

FROM GPS WORLD MAGAZINE

View the latest digital edition of GPS World magazine

Delivering GPS capabilities

During the next 18-24 months, the GPS enterprise will deliver the new and more powerful modernized GPS III capabilities across all segments of the system. Learn more about these developments.

BeiDou in the new era of globalization

In 2019, the BeiDou Navigation Satellite System has progressed with regard to aspects of system construction, integrated applications and international development. Find out how.

Cover photo: Canada's Department of National Defence

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