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(Satellites from left) GPS: In July 1995, GPS achieved full operational capability (FOC). GLONASS: In December 1995, the (then) Soviet system achieved FOC. BeiDou: On June 23, 2020, China launched the final satellite of the BeiDou-3 constellation. Galileo: The constellation has 21 usable satellites.(Credit: Satellites from public sources; background image: NASA/Chaykovsky Igor/Shutterstock.com)

Global GNSS constellations: Why 2 + 2 equals more than 4

October 18, 2021

The tremendous benefits of having four complete GNSS constellations In 2020, with the completion of China’s BeiDou-3 (aka […]


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Knowing your position is only part of navigation. (Photo: Oliver Montenbruck)

GNSS today: A four-leaf clover

October 18, 2021

By Oliver Montenbruck and Peter Steigenberger A year ago, the U.S. Global Positioning System celebrated its silver jubilee […]


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Photo: Gavin Schrock

How land surveyors grapple with rapid evolution

October 18, 2021

Gavin Schrock, PLS, shared his thoughts on how the evolution of GNSS has affected surveying. Schrock is a […]


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This is posted in From the Magazine, Survey
Photo: Mlenny/iStock/Getty Images Plus

Mapping Marvel: Lost cities found

September 28, 2021

GPS and airborne light detection and ranging (lidar) have revolutionized archaeology. In just a little more than a […]


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This article is tagged with , , , , , , , , , and posted in From the Magazine, Mapping
Photo: SOPHIE-CARON/iStock Unreleased/Getty Images

Seen & Heard: Space Force recruits with GPS

September 28, 2021

“Seen & Heard” is a monthly feature of GPS World magazine, traveling the world to capture interesting and […]


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Spirent Federal Systems’ GSS6450 RF record and playback GNSS simulator is portable, for testing automotive applications in the field. (Photo: Spirent Federal)

Simulating complexity: Testing GNSS receivers requires increasingly sophisticated simulators

September 23, 2021

Simulator vendors explain their evolution in response to changes in GNSS/PNT, comment on technical challenges they face, and […]


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Photo: RedTail Lidar

Launchpad: Network solutions, lidar and UAVs

September 23, 2021

A roundup of recent products in the GNSS and inertial positioning industry from the September 2021 issue of […]


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This is posted in From the Magazine, Mapping, OEM, Survey, Transportation, UAV/UGV
Visualization of dominant tree structures in Northern Wisconsin around the flux towers. (Image: Routescene)

UAV lidar to inform carbon-emission reduction policy

September 23, 2021

A specialist team at the University of Wisconsin-Madison (UW-Madison) used the Routescene UAV lidar system to detect and […]


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This article is tagged with , , and posted in From the Magazine, Survey, UAV/UGV
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