November 22, 2014
Figures & Tables: Tracking IRNSS Satellites
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By Inside GNSS
Global Navigation Satellite Systems Engineering, Policy, and Design
Global Navigation Satellite Systems Engineering, Policy, and Design
Return to main article: "Tracking IRNSS Satellites"
By Inside GNSSEvery so often, anthropologists — and maybe a few mathematicians — have a field day puzzling over the origins of our positional base-10 numeral system.
Oh, not the historical origins themselves, the Hindu-Arabic innovations beginning in the 5th and 6th centuries. That’s all pretty much agreed.
No, I’m referring to the possible physiological inspirations, the readily visible digits at the ends of our limbs: 10 fingers, 10 toes.
Coincidence? Does nature have coincidents, or does it abhor them like vacuums — o horror vacui?
By Inside GNSS
Moscone CenterThe 47th American Geophysical Union Fall Meeting will take place from December 15-19, 2014 at the Moscone Center in San Francisco, California, U.S.A.
Registration information can be found here.
By Inside GNSS
RIEGL has announced that its next international user conference, RIEGL LIDAR 2015, will be held in Hong Kong and Guangzhou, China, next May.
“To meet the growing demand of our products in China, we’ve opened a new RIEGL CHINA office just recently. To recognize this development, we will hold our next user conference in Asia. We look forward to welcoming our international and Chinese community to the spectacular cities of Hong Kong and Guangzhou!” said Johannes Riegl Jr., RIEGL Chief Marketing Officer.
By Inside GNSS
Officials at opening of ING Robotic Aviation’s new facility in Ottawa included Hon. James Moore (center), Canadian Minister of Industry, and Ian Glenn (3rd from right), ING Robotic CEOING Robotic Aviation officially opened the doors to its new facility in Ottawa earlier this week—representing another step forward in the company’s move into the commercial market.
The Hon. James Moore, minister of Industry Canada, officially opened the Ottawa–Orléans the new 4,000-square-foot office, which houses sales, R&D, marketing, and operations production.
By Inside GNSS
Brian Wynne, new AUVSI leaderThe Association for Unmanned Vehicle Systems International, the world’s largest professional and industry group for those in the unmanned technology sector, has chosen a private pilot with roots in commercial transportation as its new president and chief operating officer.
Brian Wynne, currently president of the Electric Drive Transportation Association (EDTA), will be leading the organization as regulators work through the rules needed to integrate unmanned aerial systems into the national airspace and car companies build on advances in assisted-drive vehicles.
By Inside GNSS
Image captured by an onboard Infra-red camera during the West Virginia demonstrationLarge wildfires can create their own weather and a dynamic, uncertain environment, and that is one of the reasons they’re so dangerous, says Manish Kumar, an Associate Professor in the Department of Mechanical, Industrial, and Manufacturing Engineering at the University of Toledo.
By Inside GNSS
The number of special requests to fly unmanned aircraft commercially has surpassed 130 as firms search for a way around a federal ban on for-pay flights. The new numbers came to light the same day a court decision underscored regulators’ authority to rein in the industry with restrictions unlikely to be lifted until new rules are put in place years from now.
By Inside GNSS
The U.S. Defense Department (DoD) is launching a search for innovative technologies to help U.S. forces to maintain their advantage in the face of gains by potential adversaries, tighter budgets, and an increasingly complex landscape of security challenges.
At the top of the agency’s wish list are advances related to unmanned systems, including miniaturization and robotics as well as systems that can operate more autonomously.
By Inside GNSS
Cospas–Sarsat’s extension to MEOSAR (Medium Earth Orbit Search and Rescue) will extend its search and rescue coverage (the area outlined in red). On the ground the Galileo programme is contributing a Toulouse-based test bench, and a networked trio of MEOSAR ground stations – known as Local User Terminals (LUTs) – to cover Europe, based in Svalbard in the Norwegian Arctic, Cyprus and the Canary Islands. Existing LUTs are distributed on a per country basis, but it is an advantage of MEOSAR that fewer ground stations will be needed for greater coverage. Cospas-Sarsat illustration The European Space Agency (ESA) has announced completion of tests that indicate the readiness of the European component of a modernized, GNSS satellite–aided search and rescue service known as Cospas-Sarsat.
ESA has completed construction and testing of a trio of located on three islands at the far corners of the continent, ready to pick up distress calls via satellite from across Europe and its surrounding waters.
By Inside GNSS
Efficient power transmission and distribution would benefit from synchronized near–real-time measurements of voltage and current phasors at widely dispersed locations in an electric power grid. Such measurements also could enable effective real-time system monitoring and control, which are considered to be the key to preventing wide-scale cascading outages like the 2003 Northeast Blackout.
By Inside GNSS
As a navigation satellite transmits multiple signals on single frequency (e.g., Open Service and Restricted Service over L5 Band), these are combined on a common carrier to comprise a composite signal. This composite signal passes through navigation payload subsystems such as an up-converter, traveling wave tube amplifier (TWTA), filters, and so on. These subsystems may introduce adverse effects on the signal, such as amplitude and phase distortion, nonlinear effects, gain imbalance, IQ imbalance, and phase noise.
By Inside GNSS
Figure 2: Sky plot showing position of IRNSS and GPS satellites over Helsinki Finland on November 6, 2014 at 16:10 local time.The Indian Regional Navigation Satellite System (IRNSS)] is designed as a stand-alone regional navigation system with a primary service area extending up to 1,500 kilometers from the Indian land mass. Finland lies north of 60°N latitude more than 5,000 kilometers away from India, as shown in Figure 1 (see photo at the top of this article).
By Inside GNSS
