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From the Magazine

(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

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

GNSS today: A four-leaf clover

October 18, 2021

Photo: Gavin Schrock

How land surveyors grapple with rapid evolution

October 18, 2021

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

Mapping Marvel: Lost cities found

September 28, 2021

Photo: SOPHIE-CARON/iStock Unreleased/Getty Images

Seen & Heard: Space Force recruits with GPS

September 28, 2021

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

Photo: RedTail Lidar

Launchpad: Network solutions, lidar and UAVs

September 23, 2021

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