Machine Control

Septentrio Announces First GNSS Receiver with Full Support of TERRASTAR Services

October 10, 2012By

Septentrio announces the full support of TERRASTAR wide-area differential and Precise Point Positioning (PPP) capabilities in some of its receivers. The Septentrio AsteRx2eL is an all-in-view dual-frequency GPS/GLONASS receiver, featuring an integrated L-band modem to receive TERRASTAR data transmitted by satellite and field-proven dm-accurate positioning using this data. AsteRx2eL also features GNSS+ technology, a unique combination of industrial grade performance algorithms,... read more

On the Edge: Go Big Green

December 1, 2011By

Nav On Time, a French Company located in Toulouse, has successfully completed a trial campaign of its Mow-By-Sat precision guidance on a commercial lawnmower. In August, the prototype of a GPS-guided robot lawnmower was installed on a golf driving range near Toulouse and tested in real conditions of use, day and night, maintaining a 25,000 square meter lawn since then. In a previous campaign, the mower covered more than 2.2 million yards — equal to1,250 miles or 2,000 kilometers — in 2,100 hours. (See videos of the mower in action at www.youtube.com/DSnavontime.) read more

Pulling in All Signals

March 1, 2010By
Melgard-Open

Adding GLONASS to GPS gives a total of about 50 satellites, for a significant improvement in navigation availability, reliability, robustness, and convergence time through a new multi-GNSS precise point positioning (PPP) service. System performance and field results demonstrate that there is no need to await future constellations — better performance is available now. read more

GNSS Receiver Evaluation

January 1, 2009By
FIGURE 1. Traditional in-vehicle receiver testing.

This article addresses how best to quantify “which navigation system performs best” in a realistic testing scenario. The methodology focuses on land vehicles navigating in urban environments, but applies equally well to pedestrian navigation and can be adapted for testing assisted-GNSS implementations. During a drive test, the truth-reference system and RF recording system log samples to disk, with no need for the receivers under test to be included during the actual drive. read more