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August 18, 2020

Novel Anti-Jamming Techniques for GNSS-based ERTMS Train Control

The digital outputs of a four-channel antenna processing chain consisting of a four-element squared phased array and a 4-coherent channels front-end are processed to identify the presence of a jamming signal. The processing unit then implements a spatial filter to minimize jammer impact. The reconstructed signal is input to a COTS/SDR receiver designed to work in a typical railway environment.

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By Inside GNSS
VN GNSS-INS
August 12, 2020

Get with the Inertial Program: An Advanced Engineering Archive

An extensive and significant body of technical information on inertial navigation, including detailed instruction, technical papers and use cases, has appeared online. This valuable resource is openly available to engineers, designers, integrators, and specifiers working on UAVs, aerial and ground survey and mapping, construction, surveillance and reconnaissance, satellite communications, military and much more. 

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By Inside GNSS
UAE
August 10, 2020

Emirates Join GNSS Crowd, Will Launch SatNav Next Year

The United Arab Emirates will launch a navigation satellite in 2021, according to the Emirates News Agency. “The first satellite will be launched in 2021 and the second — a technologically enhanced one — the following year,” said Dr. Khaled Al Hashmi, Director of the National Space Science and Technology Centre (NSSTC) at UAE University in Al Ain.

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By Inside GNSS
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GPS III satellite ships to launching site. Lockheed Martin photo

GPS III Advances with M, 4 and 3

The new GPS Military-Code (M-Code) Early Use (MCEU) hardware and software upgrade successfully took place on July 27 at the GPS Operational Control System (OCS) at the Master Control Station at Schriever Air Force Base, Colorado and Alternate Master Control Stations at Vandenberg Air Force Base, California.

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By Inside GNSS
glonass-k
August 4, 2020

Ready, Steady, Go — Here at Last Comes GLONASS-K

The third next-generation GLONASS-K navigation satellite, postponed several times, will now take place in late August or early September, according to reported statements by Russian space industry sources. This marks a long-delayed step along a road towards interoperability with other GNSS. The first GLONASS-K satellite was launched in 2011 and a second one in 2014.

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By Inside GNSS
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Beidou3

Light Relief: GNSS Buddy Road Trip

In a feelgood two-and-a-half minute video cartoon aimed well below its audience’s head, the XinhuaNet.com news service explains BeiDou advantages over GPS and other GNSS. Principally, the script stresses the satnav system’s two-way short message service (SMS) texting capability that can stand in for cellular communications in remote areas and in case of natural disasters that may disable cellular base stations.

Beidou4Set to a loping synthesized country rock soundtrack, the entertainment-with-a-message follows a passenger bus through a remote desert. When Buzz the Driver, spooked by a snake, deviates from his planned course, a BeiDou monitoring station quickly detects the error, generates an alarm and sends a message: “Hey, keep yourself focused!”Beidou

The animation gives a nod to other GNSS by stating that “Me and other family members are compatible and interoperable at the user level, which allows us to work together.”

 

 

 

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