A new high-accuracy technique using one dual-frequency GNSS receiver, precise point positioning (PPP) offers the possibility of cost-effectively obtaining coordinates. This study investigates the accuracy of kinematic PPP for hydrographic applications on rivers, and shows results comparable to double-difference solutions.
Countering Ionospheric Disturbances Affecting GNSS in Brazil By Marcio Aquino After 27 months of intense research, the CALIBRA project […]
By Denis Parrot Guest Columnist, Survey Scene newsletter I recently read an article by David Doyle entitled “Why Doesn’t my […]
The PPP Software Centre, an email-based Online PPP comparison utility hosted by the University of New Brunswick, is once […]
Fugro has been awarded a contract by subsea contractor DeepOcean for the provision of precise satellite positioning for […]
NavCom’s StarFire Network is a global satellite-based augmentation system (GSBAS) that provides five centimeter positioning accuracy on a […]
Two dual-feed GPS/GLONASS antennas from Tallysman’s GNSS antenna range are now available in Australia and New Zealand through M2M […]
Handling the Biases for Improved Triple-Frequency PPP Convergence
Precise point positioning (PPP) can be considered a viable tool in the kitbag of GPS positioning techniques. One precision aspect of PPP is its use of carrier-phase measurements rather than just pseudoranges. But there is a catch. Often many epochs of measurements are needed for a position solution to converge to a sufficiently high accuracy. In this month’s column, we look at how using measurements from three satellite frequencies rather than just two can help.
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