From the Magazine

PNT Roundup: Inertial market outlook, 3D grows lidar, RoboParachute drops

February 22, 2016By
Blue Force Tracker units may add inertial to GPS for unit and individual soldier location.

Inertial effort underway for MGUE
The U.S. Air Force’s Joint Service Systems Management Office (JSSMO) has awarded Northrop Grumman Corporation an order to support embedded GPS/inertial navigation system (INS) pre-Phase 1 modernization efforts. read more

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Expert Opinions: Optimum number of GNSS signals for PNT device

February 22, 2016By

Q: What is the optimum number of GNSS signals to include/process in a consumer-grade PNT device? A: The cost for including additional silicon to a receiver for processing more signals is low, thanks to multiplexing hardware and high clock speeds. Having more satellite measurements allows the receiver to be selective about which ones it actually uses for PVT calculations, so... read more

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Antennas: The unsung heroes of the GNSS industry

February 22, 2016By

By Tracy Cozzens Managing Editor Antennas. When I was a kid, antennas meant the pair of rabbit ears sitting on top of the family TV set. We had to constantly adjust the angles to get the best reception, using aluminum foil to improve the signal. Wow, how things have changed. Today, consumer users of smartphones, Fitbits, smartwatches, tablets and a... read more

Research Online: Multi-sensor SLAM key to tactical situational awareness

February 22, 2016By

Rescue and military applications require rapid, accurate and reliable information about unknown environments. Simultaneous Localization and Mapping (SLAM) is a key technology for providing an accurate and reliable infrastructure-free solution for indoor situational awareness. The researchers’ approach is to integrate a monocular camera, multiple inertial measurement units (IMUs), a barometer and a ranging sensor to obtain a solution for SLAM,... read more

Out in Front: ION-ITM addresses ethics of autonomy

February 22, 2016By

The talk veered off into rather heady philosophical realms at the plenary session for ION’s International Technial Meeting in late January. Two of the three speakers had been encouraged to go well outside the box — and not to employ any equations in doing so — to address or envision the autonomously navigated future. We are caught in the act... read more

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GNSS echo sounder guides medical ship through uncharted waters

February 16, 2016By
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An Australian company that manufacturers GNSS echo sounders aided the aiders — leading a medical ship through uncharted waters in Papua New Guinea. The CEESCOPE echo sounder enabled the ship to reach volunteers who were working to save the life of a newborn. The ship, operated by YWAM Medical Ships Australia (YWAM MSA), visits remote villages in Papua New Guinea, giving... read more

Coyote howls into the wind

February 15, 2016By
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A team from the National Oceanic and Atmospheric Administration (NOAA) and Raytheon has successfully demonstrated advancements of the Coyote Unmanned Aircraft System (UAS), verifying new technology that improves Coyote’s ability to collect vital weather data on hurricanes. read more

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Innovation: Null-steering antennas

February 11, 2016By
FIGURE 1. Geometry of antenna array consisting of seven dual-frequency (L1, L2), dual polarized (RHCP, LHCP) elements arranged on a circular ground plane.

Assessing the performance of multi-antenna interference-rejection techniques
Several factors affect the levels of signal rejection using antenna arrays. Our authors describe experiments to assess the bounds the factors impose on its signal rejection capability. read more

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