25 years on the path to multi-GNSSAs Galileo, BeiDou, the Quasi-Zenith Satellite System, the Indian Regional Navigation Satellite System, and a variety of satellite-based augmentation systems join GPS and GLONASS, we help celebrate the coming 25th anniversary of the IGS as a truly multi-GNSS service.
More Is BetterThe PPP technique is making inroads in the positioning industry. By using a multi-system, multi-carrier-frequency approach, instantaneous centimeter-level PPP can be achieved.
Where is it?Intentional or unintentional, GNSS interference means headaches, if not worse. This month’s Innovation column tells us how to detect GNSS interference and find its source so that remedial action can be taken.
Making It BetterReal-world tests show improved single-frequency GNSS positioning in urban environments using GLONASS alongside GPS, as well as the effect of different antennas and adaptive weighting of observations. Results? Single-frequency accuracies below one meter.
Body Fitting
Ultra-wideband is being used in a novel microwave imaging and localization system, one which features Antonio Vivaldi’s namesake antenna.
Where Are We Now, and Where Are We Going?
In this month’s column, we travel along the road of PPP development, examine its current status, and look at where it might go in the near future.
Constellation completedThe first, or prototype, Block I QZSS satellite was launched in 2010 and, based on the positive test results from this satellite, an additional three satellites were launched in 2017, completing a four-satellite constellation. In this month’s column, we examine the recent developments of this unique and innovative navigation system.
Follow Us