GNSS

Salvaged Galileo satellites to broadcast test signals

August 15, 2016By
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News from the European Space Agency Europe’s fifth and sixth Galileo satellites, which were salvaged from their faulty launch into working orbits, are set to begin broadcasting working navigation signals for test purposes. This activation will allow satnav receiver manufacturers, service providers and scientific researchers to make use of these test signals. A decision on whether these satellites will become... read more

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Considering GPS III in light of a PNT wager

August 10, 2016By
SV 01 in testing at Lockheed Martin's Denver facility. (Photo: LMCO)

It was not a big wager as wagers go, but the underlying premise spoke volumes. It all began innocently enough in 2005 when the first test, or proof of concept, Galileo satellite known as GIOVE-A was launched. Who won the wager, and what can that tell us about GPS III? read more

Expert Opinions: OEM R&D budget for mitigation of jamming

August 8, 2016By

Q: What percent of a GNSS designer or manufacturer’s R&D budget should be devoted to mitigation of jamming? A: Solving for jamming, intentional or unintentional, in the design of any GNSS technology platform is no longer an option. How much any one company spends is largely a function of how much is spent on engineering overall and of how much... read more

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US Air Force releases GPS III-3 launch services RFP

August 4, 2016By
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The Air Force has released a Request for Proposal (RFP) for launch services for the GPS III-3 mission, scheduled to launch in 2019. Proposals are due Sept. 19; the contract will be a standalone contract for a single GPS III launch. The United Launch Alliance (ULA) and SpaceX are expected to compete for the contract. In April, SpaceX was chosen to launch the... read more

Air Force upgrades to better field reference system for testing GPS denial

Non-GPS positioning system, White Sands North Range. X = transmitter site.

Can’t Deny the Truth: Defeating the Jamming Threat Initial Operational Capability for the Ultra High-Accuracy Reference System has been declared by the U.S. Air Force. Even when GPS is being completely jammed, UHARS provides extremely accurate positioning, navigation and time — more accurate than GPS — over the large area of White Sands Missile Range in New Mexico. Amid a... read more

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Elliptically orbiting Galileo satellites to start broadcasting navigation messages

August 2, 2016By

News courtesy of CANSPACE Listserv. According to two Notice Advisories to Galileo Users (NAGUs), the two Galileo satellites launched into elliptical orbits in August 2014, GSAT0201 using PRN code E18 and GSAT0202 using PRN code E14, will start transmitting navigation messages for test purposes this Friday, Aug. 5. The Signal Health Status (SHS) flags will be set to “Test” and... read more

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Australia drifts away from GNSS measurements

August 2, 2016By
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Australia is moving north at the rate of approximately 2.75 inches per year, causing it to be out of sync with GNSS positioning by nearly five feet, reports the BBC. Scientists are working to correct the measurement problems this situation creates. The shift, caused by normal tectonic movement, is causing a discrepancy that would interfere in the future use of self-driving cars.... read more

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Trimble acquires Axio-Net GmbH to reinforce European presence

August 1, 2016By
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Trimble has acquired Axio-Net GmbH from Airbus Defence and Space. Based in Hannover, Germany, Axio-Net is a provider of GNSS corrections and professional data services serving Germany, the United Kingdom and Benelux. Financial terms of the transaction were not disclosed. Axio-Net, founded in 2008, delivers both real-time and post-processed network real-time kinematic (RTK) solutions to a broad range of users including surveyors,... read more

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