GPS World

Tag: NMEA

  • New Version of NMEA 0183 Released

    The National Marine Electronics Association (NMEA) has released a significantly updated version of NMEA 0183, its well-known standard that enables the interfacing of marine electronics, reports the Martime Executive. Version 4.10 will improve boating safety and navigation through updates and expansions of various electronic communications “sentences” pertaining to a number of navigation and communications devices, including Galileo satellite receivers and Automatic Identification Systems (AIS).

    NMEA 0183 defines electrical requirements, data transmission protocol and timing, and specific sentence formats for a 4800-baud serial data bus. Version 4.10 affects shipboard, non-shipboard, and land-based equipment as well as networks for maritime and other industry use. The standard has been expanded to include Galileo. Many of the existing GNSS sentences have been extended to accommodate Galileo and future GNSS improvements.

    Version 4.10 replaces V 4.00, created in 2008. The new version is backward-compatible to V 2.00.

    Read more about the changes here.

  • Oxford Technical Releases 6-Axis Inertial+

    Oxford Technical Solutions (OxTS) has rolled out its Inertial+, an inertial navigation system that can be used with an existing GPS receiver to improve position measurements, according to the company.

    The Inertial+ includes inertial sensors, processing engine, and algorithms. It is built around a 6-axis inertial measurement unit — including three angular rate sensors (gyros) and three servo-grade accelerometers — to measure position and velocity even when GPS is not available, OxTS said.

    Designed for surveying in an urban environment, the Inertial+ is able to ignore or correct jumps in the GPS measurements. In addition to position data when combined with a GPS receiver, the device will also produce measurements like roll, pitch, and heading. Data is read and output in NMEA format, and other formats are supported. By combining an Inertial+ with a high-accuracy real-time kinematic (RTK) GPS receiver, users can achieve 1 centimeter precision, 0.03 degrees roll/pitch accuracy, and low drift rates when GPS is not available, according to the company.