GNSS

SpaceX wins second US Air Force contract to launch GPS III

March 15, 2017By

SpaceX has won a second contract from the U.S. Air Force for launch services to deliver a GPS III satellite to its intended orbit. SpaceX was awarded the $96,500,490 firm-fixed-price contract over the United Launch Alliance. ULA — a joint venture of Lockheed Martin Space Systems and Boeing Defense, Space & Security — did not compete for the first GPS III launch contract.... read more

Innovation: Position estimation using non-line-of-sight GPS signals

March 15, 2017By and

Reflected Blessings.
A technique developed by researchers at the University of Illinois at Urbana-Champaign distinguishes a reflected non-line-of-sight (NLOS) signal of a particular satellite from the LOS signal and characterizes the NLOS signal as coming from a virtual mirror-image satellite in the direction of the signal reflection point. By using information on the position and orientation of the reflector, the NLOS signal can be treated as an additional LOS signal. read more

Turbulence not the culprit for Northern Lights’ effect on GNSS

March 14, 2017By

Researchers at the University of Bath, U.K., have gained new insights into the mechanisms of the Northern Lights, providing an opportunity to develop better satellite technology that can negate outages caused by the natural phenomenon. Previous research has shown that the natural lights of the Northern Lights — also known as Aurora Borealis — interfere with GNSS signals. Plasma turbulence within the Northern... read more

Respect the facts: March for Science

March 14, 2017By

In life, few things are certain. In family, love and friendship, fewer. Add more people — workplace, groups, associations, government, society, nations, war — and the complications multiply, the certainties become more scarce. Some things, however, remain fixed, and true. We call them facts. They are not subject to denial or claims of fakery. They can sometimes be distorted, or... read more

‘DevOps’ best practices drive progress on next-gen GPS OCX control system

March 7, 2017By

New tech development approach speeds progress on improved GPS Raytheon’s use of technology development best practices — DevOps — and its completion of a systems engineering milestone are driving progress on the GPS  Next-Generation Operational Control System (OCX), according to the contractor. Raytheon has completed its latest major systems engineering milestone for the final software iteration, a marker of the progress achieved... read more

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System of Systems: DHS Receiver Improvements, Australian SBAS

March 6, 2017By

DHS Spells Out Receiver Improvements In early January, a new Department of Homeland Security (DHS) document appeared: “Improving the Operation and Development of Global Positioning System (GPS) Equipment Used by Critical Infrastructure.” The document focuses on receivers used in critical infrastructure, with an emphasis on timing receivers. It provides owners, operators, researchers, designers and manufacturers with information to improve the... read more

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GLONASS ground station goes live in South Africa

March 6, 2017By

A GLONASS ground station was officially commissioned in South Africa on Feb. 27. “Assembling and pre-commissioning work was completed on Nov. 25 to set up a measuring station on the premises of the Hartebeesthoek Radio Astronomy Observatory (HartRAO) as part of the agreement signed between Russia’s High-Precision Instrument Systems Company and South Africa’s HartRAO on Oct. 29, 2015,” said the... read more

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BeiDou launch schedule shared

March 6, 2017By

A launch schedule for future BeiDou satellites was reported on a space news discussion board. According to the schedule, the government of China is planning to launch 32 satellites through 2020. The schedule includes nine BeiDou-3 MEO satellites launched this year, and one replacement for a BeiDou-2 satellite, which retires in January 2018. The schedule is below: A PDF of the schedule is... read more

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