TAG: RTCM

CNES offers new Android apps for GNSS

April 24, 2017By

French space agency CNES has made available two applications on the Google Play store for Android apps. Both are compatible with Android N (Nougat). RTCM Converter: This app aims to convert the smartphone GNSS raw measurements to Radio Technical Commission for Maritime Services (RTCM message type 1077) and send them to a caster, for use by third-party software. PPP WizzLite: This app... read more

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System of Systems: DHS Receiver Improvements, Australian SBAS

March 6, 2017By
To improve precision navigation, a second-generation SBAS will use signals from both GPS and Galileo, and dual frequencies, to achieve even greater GNSS integrity and accuracy.

DHS Spells Out Receiver Improvements In early January, a new Department of Homeland Security (DHS) document appeared: “Improving the Operation and Development of Global Positioning System (GPS) Equipment Used by Critical Infrastructure.” The document focuses on receivers used in critical infrastructure, with an emphasis on timing receivers. It provides owners, operators, researchers, designers and manufacturers with information to improve the... read more

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Recommendations: RTCM on BeiDou use, DHS on critical timing receivers

February 24, 2017By
Improving_the_Operation_and_Development_of_Global_Positioning_System_(GPS)_Equipment_Used_by_Critical_Infrastructure_S508C-cover

Two documents of interest and importance to GNSS designers and manufacturers have been published, one from the Radio Technical Commission for Maritime Services (RTCM) and one from the U.S. Department of Homeland Security (DHS). The latter document is the subject of a news story concerning receivers used in critical infrastructure, with an emphasis on timing receivers. It provides owners, operators, researchers,... read more

BKG NTRIP Client update coming April 18

April 6, 2016By
BNC on a Mac system for static real-time precise point positioning with Google Maps, such as for early warning of natural hazards.

A new version 2.12 of the BKG NTRIP Client (BNC) will be available on April 18. Originally developed in cooperation of the Federal Agency for Cartography and Geodesy (BKG) and the Czech Technical University (CTU) with a focus on multi-stream real-time access to GNSS observations, the software has been substantially extended. The BKG Ntrip Client is an open source multi-stream... read more

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SkyTraq launches low-power RTK receiver

March 29, 2016By

SkyTraq Technology Inc., developer of high-performance chipset and module solutions for the GNSS market, unveiled its new S2525F8-RTK low-power, single frequency RTK receiver for applications requiring centimeter-level accuracy positioning. S2525F8-RTK is a multi-constellation GNSS RTK receiver that can use 12 GPS, eight SBAS, six BDS, and one QZSS signal. In situations where an RTK fix is not possible, a Float RTK mode can... read more

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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