TAG: PPP

Tallysman GPS/GNSS Antennas Available in Australia, New Zealand

April 7, 2015By
TW4421 wideband dual-feed GPS/GLONASS antenna.

Two dual-feed GPS/GLONASS antennas from Tallysman’s GNSS antenna range are now available in Australia and New Zealand through M2M Connectivity. Tallysman is a Canada-based developer of high-performance GNSS antennas focused on the requirements for precision and multi-constellation GNSS receivers. Featuring a dual-feed wide-band patch element, Tallysman’s TW2410 and TW4421 antennas cover the GPS L1, GLONASS G1 and SBAS (WAAS, EGNOS and MSAS) frequency band... read more

Innovation: Carrier-Phase Ambiguity Resolution

April 3, 2015By
FIGURE 9. Network used for the triple-frequency PPP study.

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. read more

Veripos Offshore PPP Services Improve Accuracy

March 11, 2015By

Veripos, a supplier of high-precision GNSS positioning facilities to offshore and associated industries, has upgraded its Apex and Apex² precise point positioning (PPP) services. The services now typically provide users with a horizontal position accuracy of better than 5 cm and 12 cm in the vertical at the two sigma (95 percent) confidence level. The enhanced levels of performance, now available to... read more

On the Edge: The Precision to Carry On

March 1, 2015By
Components easily pack into a baseball-style case.

When asked to do a small survey job overseas, we were concerned about shipping bulky and expensive survey equipment. Shipping costs are not trivial. Add to that the real possibility that your survey equipment may be confiscated by the local authorities, as ours was in Djibouti, and the cost of shipping equipment becomes a substantial part of the overall job. There should be alternatives, especially if accuracy requirements are not stringent. read more

New Open Source BKG Ntrip Client Published

September 23, 2014By
bncSS2

The International GNSS Service (IGS) has published a new version of the Open Source BKG NTRIP Client (BNC) for real-time GNSS applications and RINEX3 QC. Follow this IGS link to download precompiled binaries for Linux and Windows systems. Version 2.11.0 includes a bug fix for GLONASS code biases as well as RTCM SSR message updates for PPP. The maximum number of GNSS observations has been increased... read more

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NovAtel’s Velocity Magazine Features PPP

September 10, 2014By

NovAtel is offering a sneak peak at its Velocity 2014 magazine, which features an informative technical article on precise point positioning, or PPP. The article, “Advanced GNSS Positioning Solutions with Precise Point Positioning,” discusses how NovAtel CORRECT is designed to optimally handle GNSS constellations and corrections to deliver the best possible positioning solution. The new Velocity magazine is available at the ION GNSS+ conference in NovAtel’s booth, Booth J. Anyone not able to... read more

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Veripos Picked for Offshore Fleet Positioning

January 27, 2014By

Singapore-based Miclyn Express Offshore (MEO), a provider of offshore support vessels across South East Asia, Australia and the Middle East, has awarded Veripos a five-year contract for provision of high-precision GNSS positioning services in support of its fleet of 27 ships. Under the terms of the contract, Veripos will provide MEO’s fleet with Veripos Ultra Precise Point Positioning (PPP) service... read more