A new study examines the factors that would enable researchers to create a Martian version of the Global Positioning System widely used on Earth. Mendillo et al. investigated the planets ionospheric characteristics with radio signal data taken from the Mars Global Surveyor spacecraft and analyzed how local time, latitude, and solar cycle patterns would affect Mars electron content and contribute to errors in estimating exact locations on the planets surface.
They note that, as seen on Earth, a planets ionosphere imparts a delay on radio transmissions between an orbiting satellite and ground receiving stations that can hinder precise location of ground sites. The magnitude of the delay effect on Mars would depend on the radio frequency selected for its satellite navigation system, or it could be overcome by using a dual-frequency system.
The authors suggest that a constellation of GPS-like satellites could be introduced to improve navigation and provide continual monitoring of Martian features and locations with an expected margin of error of around one meter [three feet].
Title: Ionospheric effects upon a satellite navigations system at Mars
Michael Mendillo | Radio Science
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University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
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Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
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