Design & Test

Leap Second Implementation Confuses Some Receivers

February 2, 2015By

The United States Civil GPS Service Interface Committee (CGSIC) has issued a notice about a problem some receivers are having implementing the correct time. The U.S. Coast Guard Navigation Center has received reports of synchronization issues since the implementation of a leap second on Jan. 21. Users experiencing this problem should contact the receiver manufacturer for a firmware or software update. Below is the... read more

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New NovAtel RTK GNSS Receiver Offers Advanced Heading Capabilities

February 2, 2015By
FlexPak6D-NovAtel-O

NovAtel Inc. has announced the FlexPak6D enclosed GNSS receiver, a flexible dual-antenna solution for application developers seeking a high-precision heading-capable positioning engine for space-constrained applications. Designed for efficient and rapid integration, the compact, lightweight receiver tracks GPS, GLONASS, Galileo and BeiDou. Antenna placement is flexible, which means the antenna baseline can be set according to space available on the vehicle... read more

Innovation: Python GNSS Receiver

February 1, 2015By
FIGURE 8. The trip back to Puno as determined by Receiver Y after cooperative scalar tracking and navigation computations. Compared to Figure 4, the navigation solutions are less noisy. Image courtesy of Google Earth and the GPS Visualizer.

An Object-Oriented Software Platform Suitable for Multiple Receivers
An experiment highlights the abilities of the Python Receiver, showing how it has been used to develop a software-defined GNSS receiver — one well-suited to processing data from a network of receiver front ends. read more

OxTS Offers Core Module for Inertial, GNSS

January 30, 2015By
Oxford-Oxts-Core_hand

The xOEMcore, now being offered by Oxford Technical Solutions (OxTS), is an inertial navigation system that can also serve as a framework for other positioning systems. The xOEMcore is a combined six-axis inertial measurement unit and navigation system with sensor fusion in one compact OEM module. In its base form, the xOEMcore measures and outputs raw accelerations and angular rates... read more

2, 4, 6, 8 — Who Do We Appreciate?

January 29, 2015By

Galileo, that’s who! For dogged determination and persistent pushing-forwardness in the face of adversity, obstacles, and the occasional technical difficulty. That there may be occasional confusion, as well, or mixed messages as to just what the future may bring, is certainly understandable. In fact, it is to be expected, given the circumstances. Let’s review the math. Two Two for the... read more

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CNAV Messages Now Transmitted Daily

January 2, 2015By

News courtesy of CANSPACE Listserv.   Starting December 31, 2014, the Air Force 2nd Space Operations Squadron began transmitting daily CNAV uploads. The CNAV signals should continue to be considered pre-operational and should be employed at the user’s own risk. read more

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Out in Front: All-Day, Everywhere for All

January 1, 2015By

We appear incompletely before you this month. A funny thing happened on the way to the presses: we discovered that we had more content than pages in which to squeeze it. “All the news that fits to print,” the motto of the New York Times, can in this instance not be ours. All the news just won’t fit! First to... read more

GNSS Frontiers: BeiDou and Ubiquitous Location

December 18, 2014By

The Stanford Center for Position, Navigation and Time conducted its eighth symposium on PNT in October. These symposia have always been a superb two (this year three) days of excellent presentations, ranging over the entire domain of PNT, including policy factors as well as technical ones. read more