GNSS

Research: Accelerating GNSS software receivers

November 16, 2016By

By Carles Fernandez–Prades, Javier Arribas and Pau Closas, Centre Tecnologic de Telecomunicacions de Catalunya, Spain. Presented at ION GNSS+, September 2016. This paper addresses both the efficiency and the portability of a computer program in charge of the baseband signal processing of a GNSS receiver. Efficiency, in this context, refers to optimizing the speed and memory requirements of the software... read more

This article is tagged with , , and posted in From the Magazine, GNSS

4 Galileos a ‘go’ for Thursday launch

November 15, 2016By

This week’s Arianespace flight with four European Galileo navigation system spacecraft has been approved for a morning liftoff on Nov. 17 following the launch readiness review held Monday at the Spaceport in French Guiana. Designated Flight VA233 in Arianespace’s numbering system, the launch will deploy its quartet of Galileo spacecraft during a nearly four-hour flight, with liftoff set at exactly 10:06:48 a.m.... read more

This article is tagged with , , and posted in Featured Stories, GNSS, Latest News

Arianespace ready to roll out 4-satellite launcher for Galileo

November 14, 2016By

Arianespace has entered the final phase of preparations for its next Ariane 5 launch — the company’s first heavy-lift mission to orbit satellites for Europe’s Galileo navigation constellation. During activity in the Spaceport’s Final Assembly Building, Arianespace “topped off” the Ariane 5 launcher with installation of the payload fairing over the four Galileo spacecraft and their payload dispenser. With Ariane 5... read more

This article is tagged with , , , and posted in GNSS, Latest News

Roscosmos could launch up to 4 replacement GLONASS in 2017

November 14, 2016By

Russia’s Roscosmos space agency could launch up to four GLONASS navigation satellites in 2017, reports sputniknews.com. The satellites will be launched only to replace malfunctioning satellites if necessary, according to Deputy Director General for Automatic Space Complexes Mikhail Khailov. “It is planned to carry out up to four launches [of GLONASS satellites] in 2017 … We will carry them out only when... read more

This article is tagged with and posted in GNSS, Latest News

China launches pulsar navigation satellite

November 14, 2016By

China has successfully launched a navigation satellite that will conduct in-orbit experiments using pulsar detectors to demonstrate new technologies, reports The Indian Express. The X-ray pulsar navigation satellite XPNAV-1 was launched Nov. 10 atop a Long March 11 solid-fueled rocket from the Jiuquan Satellite Launch Center in China’s northwest. The experimental pulsar navigation mission carries two sensors to pick up... read more

This article is tagged with , , , and posted in GNSS, Latest News

Poll: Experiences with jamming, spoofing and RF interference

November 14, 2016By

Not with Purple Haze, but with signal interference — although, come to think of it, the two may be not unalike, phenomenologically. The October reader’s poll asked “Have you directly experienced any of the following? Check all that apply. GPS/GNSS jamming. GPS/GNSS spoofing. Unintentional RF interference. RF interference from unknown source; unknown whether intentional or not. None of the above.... read more

This article is tagged with , , and posted in GNSS, Opinions

Four Galileos now atop Ariane 5 launcher

November 11, 2016By

From the European Space Agency Europe’s next four Galileo navigation satellites are together on their dispenser atop the Ariane 5 launcher due to launch them next Thursday from Europe’s Spaceport in French Guiana. Having been attached to their dispenser as a combined upper composite, the four 715-kg satellites were transported to the final assembly building on Oct. 31. The next step... read more

This article is tagged with and posted in Featured Stories, GNSS, Latest News

New BeiDou Interface Control Document released

November 10, 2016By

Version 2.1 of the BeiDou Navigation Satellite System Signal In Space Interface Control Document for the Open Service Signal has been released. The document was issued by the China Satellite Navigation Office. It defines the specification related to open service signals B1I and B2I between the space segment and the user segment of the BeiDou Navigation Satellite System. B2I will... read more

This article is tagged with , , and posted in GNSS, Latest News