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TAG: Doppler

Signal acquisition of Iridium NEXT satellites’ signal in the long baseline positioning scenario. (Credit: Aerospace Information Research Institute)

Low-cost antennas power high-precision space-based positioning

June 5, 2025

A novel method using signals of opportunity from low-Earth orbit (LEO) satellites is redefining what’s possible in satellite-based navigation.


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This article is tagged with , , , , , , , and posted in Latest News, UAS/UAV, UAV/UGV
Image: GPS World

Austria modernizes air traffic control with Thales Doppler system

October 23, 2017

Thales has launched commercially its next-generation Doppler VHF Omnidirectional Radio ranging system, the DVOR 532. At the same […]


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This article is tagged with , , , , , and posted in Latest News, Transportation

Directions 2014: Great Expectations

December 1, 2013

By Peter O. Large, Vice President, Trimble November 29, 2013, marks the 210th anniversary of the birth of […]


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This article is tagged with , , , , , , , , , and posted in From the Magazine, GNSS, Opinions
Figure 1. Satellite tracking and carrier-phase anomaly summary during the observation time-span. These data were collected in a dense urban environment in both static and kinematic mode. The superimposed red-points show epochs where carrier-phase observables are either missing or contaminated with cycle slips, loss of locks, and/or other measurement anomalies.

Innovation: Doppler-Aided Positioning

May 1, 2011

Improving Single-Frequency RTK in the Urban Enviornment
A look at how Doppler measurements can be used to smooth noisy code-based pseudoranges to improve the precision of autonomous positioning as well as to improve the availability of single-frequency real-time kinematic positioning, especially in urban environments.


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This article is tagged with , , and posted in From the Magazine, Innovation, OEM